6l80 Harsh Downshift


It is, by most accounts, a great driving experience. I`ve had no more tranny problems since getting rid of the harsh shift that was set up in it by a rebuilder. Harsh 2-1 downshift DTC P0708, P0847, P0872, P0875, P1711, P1713 Shift busyness 2-1 closed throttle neutral feel Correction: Reprogram the Transmission Control Module (TCM) with the new service calibrations, which were available from the Techline starting March 24, 2002 on the TIS2000 version 3. Forward Planet C 2WD Only. 6L90 discussion. When I use the paddle shifters to shift from 2nd to 1st the downshift is rough. A valve body replacement does not require a complete overhaul of the automatic transmission. At the first corner of my road test, not 10 feet out of General Motors' parking lot, the rear end is already slewing sideways like a drunken sailor. Even after a new transmission was installed for me I had very harsh downshifts. Another common symptom of a problem with the downshift solenoid is a vehicle that experiences late downshifting. The 45RFE transmission is a five speed automatic transmission however when you drive the vehicle you will actually have 4 gears and lock up. See who won our head to head competition as we battle the latest V-6 trucks on the market!. Misuse of VCM Controls can cause vehicle damage. An example of this command is the Reset Fuel Trims. The turbine vanes in the turbine are curved opposite to the impeller. 0L engine, Cadillac STSV/XLRV with the 4. Making matters worse, I'm trying to learn some tricks with the traction control as it has an open diff out back. • Harsh or flaring 2-3 shifts that are more likely to occur when the transmission fluid temperature is in the approximately 0°C (32°F) to 40°C (104°F) temperature range, but can be present at any temperature. Forward Planet C 2WD Only. If its not a full line condition I would check the 2-3 accumulator. Clutch Select Valve #2 Shift complaints Clutch Select Valve #3 Shift complaints Lower Valve Body 6L80 Shown Compensater Feed Valve • Harsh shifts • Downshift clunk • Bump/Flare shifts • Bind-up • Burnt clutches • Overheated fluid Replace with Sonnax Part No. Some of us our old Kness can drive a manual any more thats why I have a Auto my self I like manual but the kness cant do it anymore. Bang 1-2 shift—Rough 2-3 shift. HP Tuners, the home of VCM Suite and the MPVI since 2003. GM 6L80 Automatic Transmission. P0826 is a diagnostic trouble code (DTC) for "Up and Down Switch Input Circuit". The 6L80 uses a trans controller that is lightning fast and is actually mounted within the trans pan attached to the valve body. This kit does not contain a pan gasket or valve body gaskets. The 6L80 is truly an an amazing transmission with Corvettes and G8s being some of the first cars to get this box. Repeat as necessary in each gear (8, 7, 6, 5, 4, 3 and 2). 3L Tahoe, Suburban, C/K Trucks Customer complaint may be harsh forced downshifts or the chuggle/shudder during a coast down intermittently. 6L80/6L90 harsh violent downshifts. I've used GM's 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. And I hardly even mashed the throttle. Try it on an open loose dirt area. The cost to replace a failed transmission torque converter clutch solenoid is determined, in part, by the vehicle year, make and model. When the bore wears, correct valve operation is hindered, causing clutch apply timing issues such as harsh shifting, flares, and bump shifts. HP Tuners, the home of VCM Suite and the MPVI since 2003. 7 4l60e trans. The turbine vanes in the turbine are curved opposite to the impeller. Re: Help with 6L80 2-3 shift issue Aug 07 2013, 12:02am Thanks, I looked at my odometer and I am showing 22,000mi (again on a 09' with the 6. In addition to the TCI 4L80E being a lot beefier than TH350, it has been prepped with valve body modifications that increased its cooling ability and improved shift characteristics. To see how frequently Chevrolet Silverado 1500 problems occur, check out our car reliability stats. 5L equipped vehicles and Duramax equipped vans. Clutch Hub Forward Clutch Hub Direct Clutch Hub Ext. This is due to a software glitch in. This procedure will learn the off-going clutch adapts for desired power downshift control. The result of all of this is a transmission that will repetitively jump between torque converter lockup and unlock, excessive heat and excessive fuel consumption. Instead of both companies collaborating on the 10-speed's development, the agreement said that Ford would develop a 10-speed transmission based on the Ford/GM 6-speed (6R80 aka 6L80) and shared. Drive in 2nd or 3rd gear for at least five seconds between kickdowns and remember to kick it down only when you are going less than 25 mph. We have extensive experience building the TH400 for all types of applications. Then, an abrupt down shift and if I'm not careful the rear wheels start to break loose. Power Downshift Adaptive Learning: Starting with the vehicle operation in 8th gear, slowly apply pressure to the accelerator pedal until downshift occurs. The transmission itself operates completely differently. See TSB (Technical Service Bulletin) reports for the 2007 Cadillac Escalade. Ford Explorer 6R60 - Free download as PDF File (. Please discard PI1343B. Please be sure to update us on how the dealership appointment goes. Average failure mileage is 24,400 miles. 4l 3v 6r80 harsh 1-2 upshift, bump whiletsb 09-11-5 coasting low speed downshift, harsh downshift to 4th gear—intermittent p0741 ford: 2009 f-150. In other words, it won't heat up as easily, and it has snappier, crisper shifts, yet it's not as harsh as a racing style transmission. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software malfunction. It wants to be a manual so bad but it can’t be. Pump wear & low or no cooler flow. The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. In addition to the TCI 4L80E being a lot beefier than TH350, it has been prepped with valve body modifications that increased its cooling ability and improved shift characteristics. If not, replace. 2L 6L80E with a towing pkg. Most mechanics will quickly tackle the timing belt job or the head gasket replacement, however, with regards to transmission matters, even the most seasoned mechanics might shy away. 42's in the diffs. The turbine vanes in the turbine are curved opposite to the impeller. HARSH/ROUGH 2-1 DOWNSHIFT CONDITION. Is this something that can be taken care of - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. Am Rafferty from Zambia, I have a 4l30e gearbox in my BMW with too much harsh downshifts. It's not slipping, it's just changing into gear kind of hard. MANUAL DIAGNOSTIC PROCEDURES. Drove 10 hours this weekend and noticed on occasion if doing say 60mph and I needed to quickly pass someone at near WOT, it will downshift several gears with a very loud and violent bang. What it's doing is when it downshifts from 2 - 1 it feels like the trans drags the motor down, like engine braking, and then shifts which feels like a lunge. I`m running 3;73 gears and a 4L60E. ZL1 6L90E harsh down shift My 6L90E is downshifting in manual mode really harsh the most notiable being the 3RD to 2ND down shift , in normal auto everything is fine it only does it in Maui all mode , would anyone have any idea what needs to be done to smooth the downshift out so it doesn’t want to throw my head forward on down shifts. My upper had a casting number of 1590, and the lower 6351. One possible explanation is that the “adaptive transmission shift strategy,” which is intended to improve shifting quality, actually worsens the shift quality for several days after the adaptive strategy. I have not had a delayed engagement, harsh shift into gear, or harsh downshift since this was done on 12/29/16. It’s a 6spd auto it should act like one. Now this transmission is the little brother the 6L80E transmission commonly found in the Holden Commo. Hmmm well at least I'm not alone. Chevrolet Silverado 1500. Chevrolet Silverado 1500 Transmission Problems. The video shows the replacement of the 1-2. some of the wiring could be getting too close to metal grounds and you could be getting a messed up computer signal. that are equipped. This information was created to inform the technician that the 2-3 upshift and the 3-2 downshift clunk is caused by the releasing of the 2-4 band and application of the 3-4 clutch assembly during. Erratic Shifts: A defective shift solenoid can also cause the transmission to shift erratically. Ganzeboom Transmissies supplies parts for automatic transmissions, manual transmissions and transfercases, torque converters and valvebodies. Since the job of the accumulator is to cushion the shift, any leakage here will cause harsh shifting. Nicaraguan hammocks are made our upbringing and we nylon string that if the marriage is glow-in-the-dark realizations). It’s a 6spd auto it should act like one. Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. But, we will focus on automatic transmission in this article. When he replaced the valve body with one from a 2008/2009 model year he was able to make it work as the OS for the tcm for that valve body (08/09) works with the alpha ecu. light duty trucks for 1991. Results: After installation of the Zip Kit, I am getting short crisp shifts in all gears. SKTFOD-DIESEL TransGo A518 A618 Shift Kit 1988-03 46RE 47RE Dodge HD 22165BT #TransGo. Fresh 4l60e is slipping at WOT Hoping someone here could brainstorm for me on my son's '95 K1500 4l60e issue: We are looking for any other culprit besides the transmission, assuming our rebuilder of the Trans is as competent as he claims:. 2L engine only). INTRO © 2018 ATRA All Rights Reserved Table of Contents FORD SECTION 6F35 Harsh Engagements, DTC P0C27 74. 4T65E Common Problems. Harsh gear shifting "Trans Failsafe" mode; When an automatic transmission like the GM 5L40-E changes gear, oil is fed into a sealed chamber, forcing a piston to push against a stack of clutch plates. (Page 1 of 6). Any input from the accelerator decouples the TC friction clutch, and the transmission reverts to a fluid drive scenario with torque multiplication. Downshift on any bikes should never be a problem, and if it is, I think that you need to find an old-timer to show you how to "rev-match". In our opinion the 6L80/6L90 is kind of a weak design, and isn't really suitable for high horsepower racing use. The check engine light came on. The 45RFE transmission is a five speed automatic transmission however when you drive the vehicle you will actually have 4 gears and lock up. Get connected to buyers and sellers of automatic transmission spare parts worldwide. the rest of the gears were fine. On the Chrysler RWD vehicles, make sure that there is a return spring on the throttle lever (at the transmission), or you will end up with harsh downshifts. 3L with Escalade 6L80 and 3. It is important to follow strategy-based diagnosis and check eSI for the latest bulletins and PIs. 3, 6 speed) with 53,000 to the dealer late last week and took a ride with the service tech for a solid clunking noise when braking. I need to travel to a dry lake bed I. The Chevy has a 4. The 2-3 shift might be a little more crisp from the corvette servo releasing. When I use the paddle shifters to shift from 2nd to 1st the downshift is rough. This condition is considered undesirable at any throttle position. [Archive] Technical bulletins C6 Corvette Z06. Transmissions typically cost upwards of a thousand dollars to fix and, if not functioning properly, can render a vehicle completely immobile and unusable. Same when it downshifts. FORD RWD 6 Speed A B D E Ford 6R60/75/80 (ZF6HP26) Forward Clutch (A) O. Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. If you really enjoy downshifting, you can purchase the parts for a manual shift kit that you can easily install from WalMart. He doesn't advocate a harsh downshift, but advises that downshifting at an appropriate RPM while braking is perfectly okay. com customer concern on a harsh (detent) 6-4 downshift. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. com and affiliated sites. This Kit Will Not Fit Late 2006 Up Models With 15 Pin or 17 Plugs ( 4L70E ). Chevy Colorado Automatic Transmission 6-Speed 2017, Lube Pump Kit by Remco®. Hi I have a 98 k1500 with the 5. i am aware of the sporty feel this truck has and the rev matching when down shifting. RAY: So, Mike, as much as we hate to do this in so public a forum, we're going to have print right here in the newspaper that your wife seems to know more about driving than you do. This position can also be selected at any vehicle speed to provide improved engine. As I start to get closer and closer to my CTS-V purchase and the eventual modifications, I am hoping I can get some information on the limitations of the OEM transmission and driveline and if there are any aftermarket solutions for these components. com! You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. The most common issue with the Ford 6R80 is hard downshifts. The most recently reported issues are listed below. MARCH 2009. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply, TEHCM and/or CAN software malfunction. I've used GM's 4L60-E as an example to stress the importance of knowing changes made throughout the years with any transmission being diagnosed. Home › Forum › GMC › 2016 Sierra Shifting Problem 6 speeed automatic This topic contains 24 replies, has 20 voices, and was last updated by Velvet01 7 months, 2 weeks ago. Ford Explorer 6R60 - Free download as PDF File (. I have just taken delivery of a new FG XR6 50thy anniversary (600 km ago), which replaced a 2006 VE SV6 5 speed auto, and prior to that a 2004 BA XR6 4 speed auto. Ganzeboom Transmissies supplies parts for automatic transmissions, manual transmissions and transfercases, torque converters and valvebodies. Chevrolet Silverado 2007-2013: Transmission Problems and Diagnostics. Same when it downshifts. The GM Hydramatic 6L80 transmission heralds a significant change in the design of automatic transmissions at General Motors. Is this something that can be taken care of - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. That's the reason for the downshift. By Jeremy Cato, Globe and Mail. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and. Downshift / Upshift problems Check Engine light Limp mode: Faulty Shift Solenoid Low transmission fluid Bad electrical connections on transmission Faulty wirings to shift solenoid Faulty TCM(Transmission control unit) Replace Shift Solenoid(If possible) Check transmission fluid level Clean connectors on transmission. 6L80E Transmission, 6l80e Welcome to the official 6l80e transmission website. 2-3 cutloose and burned plates. Harsh Shifts into 2nd & 4th Gear. Plus it has an annoying torque converter judder in 2nd gear and the 4th gear isn’t even 1:1 it’s like 1. All those jolts, bumps or harsh shifts cause premature wear and tear on your tranny. More information is available at www. IF Support Retaining Ring. They replaced wave plate, planetary gear set, and torque converter,. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Hi I have a 98 k1500 with the 5. Same when it downshifts. Codes can be cleared by. Both confirm the 10R80 10-speed transmission can exhibit harsh or delayed shifts, as well as firmer than normal upshifts and downshifts. I have seen some of the same issues reported but no clear resolutionI really need your help. For a car this big to pull 0. 2009 - 2014 F150 - 2011 EB transmission shifting problems - Hi allI've been searching through the forum and throughout the web for this issue. On the Chrysler RWD vehicles, make sure that there is a return spring on the throttle lever (at the transmission), or you will end up with harsh downshifts. 3, 6 speed) with 53,000 to the dealer late last week and took a ride with the service tech for a solid clunking noise when braking. Our “stock” rebuild is strong enough for over 600 HP repeatedly yet functions like a stock transmission. 42's in the diffs. Remember, this is a completely remanufactured automatic transmission assembled to exacting tolerances and. 5L equipped vehicles and Duramax equipped vans. At low engine speeds, the torque converter cushions the driveline jolt reasonably well. Transmission problem 2000 Chevy Silverado V8 Four Wheel Drive Automatic I have a 2000,2500 HD 4X4 4 speed auto I live in a area that is 4700 ft above sea level, it seems like ever time I change alitudes above 4700 my trans starts shifting so hard it will snap your head, after awhile it will settle down and shift normal shifting pattern is perefect, no check engine light, no noiseI am wandering. downshift to the next lower gear, and will downshift into second gear after the vehicle decelerates to a vehicle speed that will not create an engine overspeed condition. As far as someone installing the corvette servo, you would see firmer 1-2 and 3-4 shifts. Garage Shift Adaptive Learning:. Share The problem: Drivers may experience a harsh or firm downshift from 5th to 4th gear. For those of you that havent driven one, I'm talking about when you are doing 35mph in town and it wants to up shift to it's deep 6th gear, combined with tall 3. I`m running 3;73 gears and a 4L60E. The new 6L80 6sp has gear ratios of 4. 4L engine, and is scheduled for Pick-ups in 2007, as shown in Figure 1. concern on a harsh (detent) 6-4 downshift. An adjustable pin tip is included to set perfect band clearance. The Manual Low Gear position provides 1st gear operation only. 4" (35mm) longer than the 6L80 case. We do this because if the trans is backdriving the engine, the engine can reduce the amount of fuel the engine is getting to make fuel economy better. On a recent road trip, the 6-speed automatic (6L80E) transmission stumbled during the 2-3 shift while driving through the mountains and went into a failsafe mode. My 2nd issue with this trans is longevity and strength. You have 1mph between the upshift and downshift values in 1>2,2>1 and 2>3,3>2 in the 0% for both normal and pattern A. I took the truck to the dealer and they replaced a whole lot of parts on the tranny drove the truck two days and seemed ok. 4R44E 4R55E 5R55E shift kit. MANUAL DIAGNOSTIC PROCEDURES. Failure to Downshift- The 4L60E will often fail to downshift if one or more of the shift solenoids are stuck open or closed. The Automotive Powertrain Industry Journal. 2010-2012 Edge, MKX, Flex, MKS, MKT, Taurus With 6F50/6F55 Transmission - Harsh Downshift After Overhauling Transmission. downshift tuning so my latest adventure has been to get the downshifts to be smooth almost like stock. Tuning for your 6L80e Transmission. The Hydra-Matic 6L80 (production code MYC) is a six-speed automatic transmission produced by General Motors for use in rear- and rear-biased all-wheel-drive vehicles with a longitudinal powertrain. I need to travel to a dry lake bed I. Learn how to diagnose a transmission that's shifting roughly here. Control over this process resides with the compensator feed regulator valve. The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. This is a discussion on A4 4l60e Trans won't shift out of 1st gear within the Automatic Transmission forums, part of the Drivetrain category; I was hearing some grinding at low speeds in 1st gearthought it was just my brakes rubbing due to the. Fresh 4l60e is slipping at WOT Hoping someone here could brainstorm for me on my son's '95 K1500 4l60e issue: We are looking for any other culprit besides the transmission, assuming our rebuilder of the Trans is as competent as he claims:. 6L80 Intermittent Harsh Downshift, Chuggle or Shudder During Deceleration 5. On/Off: On/Off commands have 3 modes. The Manual Low Gear position provides 1st gear operation only. It is a self test for the O2 sensors. The check engine light came on. This kit does not contain a pan gasket or valve body gaskets. The six-speed automatic has a wide, 6. 3 and the so what I thought badass hydramatic 6 speed. 6L80 hard 1-2 shifts I have scoured the Internet looking for people who are experiencing the same issues I am with my transmission but haven't found anything. 4L engine, and is scheduled for Pick-ups in 2007, as shown in Figure 1. Refer to Workshop A HARSH/ROUGH 2-1 SHIFT CONDITION IS Manual section 307-01. Home › Forum › GMC › 2016 Sierra Shifting Problem 6 speeed automatic This topic contains 24 replies, has 20 voices, and was last updated by Velvet01 7 months, 2 weeks ago. Instead of both companies collaborating on the 10-speed's development, the agreement said that Ford would develop a 10-speed transmission based on the Ford/GM 6-speed (6R80 aka 6L80) and shared. Types of VCM Controls. I'm playing with settings to accomplish a good WOT upshift, quick downshift, and smooth regular upshifts with my Trailblazer 5. Both confirm the 10R80 10-speed transmission can exhibit harsh or delayed shifts, as well as firmer than normal upshifts and downshifts. 2 quarts of M1 75W90 in diff. 7L pick up, van, SUV. The ZF 6HP26/6R60/6R80 6-Speed automatic transmission, manufactured by ZF Getriebe, has found its way into a wide range of vehicles, from BMW's to Range Rovers, Jaguar's, Rolls Royce's, and a wide range of Fords. It is a self test for the O2 sensors. 2006 ATRA Seminar Manual Contents PDF free online CONTENTS General Motors Body Style Identification New Fluids Introduced AF23-5 Whine Noise 4L60/65E, 4T40. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. This is not just a sporty jerk or down shift. The NAG1 (WA580 or W5A580) automatic transmission found in many Chrysler products is an electronically controlled 5-speed transmission system with a lock-up clutch in the torque converter. One other thing I notice are the downshifts seem harsh when the truck is slowing down to a stop. Deterioration at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Description How To Diagnose? (including below signs but not limited) 1, Check Engine Light on. It is the night before my long-awaited return to the “Greatest Outdoor Show on Earth” and, on a chilly, damp Southern Alberta summer night, I am dancing my way through a field of cow pies, as light and nimble afoot as the Young Canadians are nightly on the stage at the Calgary Stampede. Equipped with 6l80 (rpo myc) automatic transmission. As such I never bothers to stay up on. Fresh 4l60e is slipping at WOT Hoping someone here could brainstorm for me on my son's '95 K1500 4l60e issue: We are looking for any other culprit besides the transmission, assuming our rebuilder of the Trans is as competent as he claims:. They performed 14-07-30-001F on mine and the problems instantly went away. And I hardly even mashed the throttle. The carrier is made up of four pressed components, which are sinter-brazed together to form a rigid, dense structure. In sport, that 45 MPH shift would be 5-2 in one jump as. Both confirm the 10R80 10-speed transmission can exhibit harsh or delayed shifts, as well as firmer than normal upshifts and downshifts. The new 6L80 6sp has gear ratios of 4. 1-2-3-4 Piston Part No. I would just put in a drain plug and change the fluid every 15k if it bothers you. Automan issue of September 2014 (issue no 157) Oman & region. 2013 CHEVROLET TAHOE Recalls (3) to correct a customer concern on a harsh (detent) 6-4 downshift. Vehicle applications include 2007-2012 Chevy Avalanche, Colorado, Express and Silverado, 2007-2009 Chevy Suburban, Tahoe and Trailblazer, 2007-2012 GMC Canyon, Savana, Sierra and Sierra Denali, 2007-2009 GMC Envoy, Yukon, Yukon XL and Yukon XL Denali, 2007. If the oil were just shot into that chamber all at once, the clutch pack would apply with a harsh thud and make for a very unpleasant driving. I've ran trans's with reverse manual valve bodies, and without. driveline clunk Aug 14 2013, 1:14am So I took my 2009 Sierra (5. this is my car, not a customers, I want to make sure all the goodie tricks/etc I can do while out and apart the better. Please follow this diagnostic or repair process thoroughly and complete each step. G8 Service Manual. Share The problem: Drivers may experience a harsh or firm downshift from 5th to 4th gear. It's gotten to the point where it waits so ridiculously long to downshift that the truck starts to convulse and shake like it's going to die. Failure to Downshift- The 4L60E will often fail to downshift if one or more of the shift solenoids are stuck open or closed. Refer to Workshop A HARSH/ROUGH 2-1 SHIFT CONDITION IS Manual section 307-01. But, we will focus on automatic transmission in this article. I took the truck to the dealer and they replaced a whole lot of parts on the tranny drove the truck two days and seemed ok. hard shifting between gears. This article applies to C5, C6 and C7 Corvette (1997-2015). This is not just a sporty jerk or down shift. I took it to the dealer and had the mechanic drive with me this morning and while he did say that the shifting points felt within spec to him he said he'd be happy to diagnose the body control module and everything and see if it spits out any codes. driveline clunk Aug 14 2013, 1:14am So I took my 2009 Sierra (5. Introduction. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and. I see no evidence that there is any attempt to accomplish “rev match on downshift”. But now I notice the transmission downshifts very hard at about 25 MPH, it never did that before. This is exactly what happens with mine. The six-speed automatic has a wide, 6. It has a wide, 6. I have not had a delayed engagement, harsh shift into gear, or harsh downshift since this was done on 12/29/16. TCC disengage (downshift) occurs at a throttle position angle of 60 degrees, independant of speed. Any input from the accelerator decouples the TC friction clutch, and the transmission reverts to a fluid drive scenario with torque multiplication. The update did make some things better but the symptoms are harsh downshift after a long run at higher speeds (like on the highway, coming down the ramp to a stop at the bottom of the ramp). The gearbox may fail to respond to throttle inputs, fail to engage a lower gear, or downshift very roughly in normal Drive mode. He hasn't had any issues with the tranny and Now less than a week into me having it, The downstream O2 Sensor has thrown a code. Ganzeboom Transmissies supplies parts for automatic transmissions, manual transmissions and transfercases, torque converters and valvebodies. When you downshift, you create a higher vacuum and are probably sucking oil in around the valve guides. 2013 CHEVROLET TAHOE Recalls (3) to correct a customer concern on a harsh (detent) 6-4 downshift. about vehicles that are equipped with 6l80 regular. from all of the descriptions of the problem it sure seems like i am suffering from the same issue except it is on my LMM. It was first introduced in the 2006 Corvette with the 6. Clean the air flow sensor also, check the minimum air rate, reset if needed, then reset the ECM and roadtest if the check engine returns with the same code, check the ECM's sensor voltage to that sensor, if the ECM's voltage is at 5 volts or just slightly below at the sensor then check the sensor ground if it checks good then replace the sensor. Read about the history of GM's iconic Allison 1000 transmission, along with its strengths and weaknesses, only on dieselpowermag. Plus it has an annoying torque converter judder in 2nd gear and the 4th gear isn’t even 1:1 it’s like 1. The ZF 6HP26/6R60/6R80 6-Speed automatic transmission, manufactured by ZF Getriebe, has found its way into a wide range of vehicles, from BMW’s to Range Rovers, Jaguar’s, Rolls Royce’s, and a wide range of Fords. I'm about 2000 miles post tsb and atf check. The 2014 Chevrolet Silverado 1500 has 101 NHTSA complaints for the power train at 31,107 miles average. At the first corner of my road test, not 10 feet out of General Motors' parking lot, the rear end is already slewing sideways like a drunken sailor. Way more complicated to control and they also have to work in synch. Repeat as necessary in each gear (8, 7, 6, 5, 4, 3 and 2). 6l80etuning. This article applies to C5, C6 and C7 Corvette (1997-2015). Condition/Concern Some customers may comment on a harsh (detent) 6-4 downshift. On the Chrysler RWD vehicles, make sure that there is a return spring on the throttle lever (at the transmission), or you will end up with harsh downshifts. If the mode switch is open, pushing either the upshift button or downshift button will put you in manual mode (and pushing both OR switching the mode select switch to auto will put you back in auto mode). Also, the 6L80 has a 'tap up/tap down' capability that allows the driver to manually select upshifts and downshifts with buttons on the steering wheel. IMPORTANT BULLETINS AND PIs FOR TRANSMISSION TECHNICIANS The listing below is accurate as of August 31, 2012 and will change with time. My upper had a casting number of 1590, and the lower 6351. 11-27 toyota u250 harsh 5-4 downshift 11-29 bmw/jaguar zf5hp24 repeat a clutch drum failure 11-30 toyota a245/246 harsh forward engagement 09-37 4l30-e various internal electrical component codes stored 10-01 nissan re4ro1a anti-rattle clip location 10-02 gm/bmw/isuzu 4l30e 4th gear starts, harsh 3rd gear or harsh downshifts. Ben Collins (the former Stig) actually advises doing while driving on the street. The CEL remained on for the next several ignition cycles. The check engine light came on. It is, by most accounts, a great driving experience. Learn how to diagnose a transmission that's shifting roughly here. replacing just solenoids without rebuilding valve body, where accumulators/pistons always go bad after 60-70k, will not get you perfect results, but might improve shifting quality. 4" (35mm) longer than the 6L80 case. light duty trucks for 1991. If the oil were just shot into that chamber all at once, the clutch pack would apply with a harsh thud and make for a very unpleasant driving. They determined that the wave plate broke and the broken pieces fell into the planetary gear set causing damage to that. that are equipped. irst it was the convertible and now it’s the hard top coupe. On this video we talk about the common issued with this particular unit. If the car wouldn't return to 6th, when slowing down to pull over, the downshifts into 4/3/2/1 are at low (<1000) rpm and were harsh. 3 and the so what I thought badass hydramatic 6 speed. This condition may also include intermittent harsh upshifts at low speeds when lifting out of throttle, and harsh downshifts at 2-1 coast down, or harsh shifts when rolling to a stop and stepping into the throttle before completely stopped. The impact of the moving fluid on the turbine vanes exerts a force that tends to turn the turbine in the same direction as the impeller rotation. Corrects, prevents or reduces 3-2 cutloose, 1-2 slide shift or slide bump shift, wrong gear starts, down shift clunks, harsh 2-3 shift, early shifts and kickdown delay. FORD RWD 6 Speed A B D E Ford 6R60/75/80 (ZF6HP26) Forward Clutch (A) O. The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. Clean the air flow sensor also, check the minimum air rate, reset if needed, then reset the ECM and roadtest if the check engine returns with the same code, check the ECM's sensor voltage to that sensor, if the ECM's voltage is at 5 volts or just slightly below at the sensor then check the sensor ground if it checks good then replace the sensor. SOURCE: 2002 Ford Explorer 5R55W transmission had Band adjustment is very sensitive on these units, I set both adjustments at one turn. Bang 1-2 shift—Rough 2-3 shift. com and affiliated sites. If the car wouldn't return to 6th, when slowing down to pull over, the downshifts into 4/3/2/1 are at low (<1000) rpm and were harsh. It has an automatic transmission, but I like to drive it in 'sport' mode where you push the gear selector to the right and then can control when the car shifts by pushing the lever forward to upshift or pulling the lever backward to downshift. Failure to Downshift- The 4L60E will often fail to downshift if one or more of the shift solenoids are stuck open or closed. 2004R Transmission Shift Kit 004R automatic overdrive transmission. Ford Explorer 6R60 - Free download as PDF File (. Control over this process resides with the compensator feed regulator valve. SKTFOD-DIESEL TransGo A518 A618 Shift Kit 1988-03 46RE 47RE Dodge HD 22165BT #TransGo. light duty trucks for 1991. Hard Downshifts, Especially the 3-1 Shift, Possible Flare/Bump on the Upshift or Downshift. On this video we talk about the common issued with this particular unit. That said, the units in the Corvette are pretty stocky. For Powertrain Warranty Coverage, the following describes inclusions and exclusions:Transmission/Transaxle Coverage Includes: All internally lubricated parts, case, torque converter, mounts, seals and gaskets. Hi I have a 98 k1500 with the 5. Compare to the correct installation which is 1. Low line pressure—Total Burnup. All previous GM automatic transmissions were virtually all based on hydraulic controls, and received increasing electrical elements as they modernized. Transmission Shift Solenoids. CarComplaints. Transmissions typically cost upwards of a thousand dollars to fix and, if not functioning properly, can render a vehicle completely immobile and unusable. At low engine speeds, the torque converter cushions the driveline jolt reasonably well. The most common issue with the GM 6L80 is hard downshifts. • Harsh or flaring 2-3 shifts that are more likely to occur when the transmission fluid temperature is in the approximately 0°C (32°F) to 40°C (104°F) temperature range, but can be present at any temperature. Clutch Hub Forward Clutch Hub Direct Clutch Hub Ext. The annoying thing in disallowing pass-thru-N down shifts is that in regular drive mode, it goes 6-5-2 (or3) and the step is delayed. GM 6L80 Automatic Transmission. Both shift solenoids A and B are located toward the rear of the transmission (see photo 3 of 3 in the image viewer) and you don't need to remove them to test them. When I do so there is definitely some engine braking occurring, but it's not overly harsh. The customer was complaining about harsh coast downshifts and dropped the vehicle off with us for an evaluation. 3, 6 speed) with 53,000 to the dealer late last week and took a ride with the service tech for a solid clunking noise when braking.