4l60e slipping after rebuild. I have a 99 Yukon 4x4. SYMPTOMS: It happened in 2 days! One day i was driving and noticed that temp went up 20 degree in 3 seconds!!!!! on the highway. Manually downshifted into first yet the transmisson still shifts all 4 gears. Apr 10, 2015 · I have a 94 Pontiac Firebird with a 4L60E automatic transmission. Worked perfectly for 25,000 miles then quit shift … read more Jul 17, 2012 · 13. I stopped, put the line back in, and added a few quarts of fluid and wanted to limp it home. GM 4L60E no 4th gear. used a pressure gauge and its a steadt 80 or so psi no matter what gear it is in. Put in new clutches and steels, commercial 3/4 pack, converter, and a . Factory transmission went out and i bought a rebuilt one from a local transmission shop. Broken Drive Shell. It's original problem was reverse gear went out on it and during the tear down the forward clutch discs were extremely worn and a couple even fused with the steels. If the trans shifts from first to second normally but the motor just revs up when it should be in third, the 3-4 clutch has failed. But apparently I missed something. No forward movement in OD or D, but L2, L1, and R work: The forward sprag is broken. This is a 2003 Suburban, 4x4, 5. can be reduced by properly cushioning the large ratio change on the 1-2 shift: Never use a 1-2 servo that eliminates the cushion spring. 87 posts · Joined 2008. Pressure solenoid. This would cause a huge leak in the reverse input drum [ the drum the band rides on ]. Feb 9, 2012 · We went in, cleaned and replaced the components that are normally replaced in a 4l60E. When a converter locks, it lowers the RPMs and usually feels like going into another gear. Sep 8, 2023 · Troubleshooting 4L60E 2-3 Shift Valve Stuck - Learn how to fix this common transmission issue. Transmission Slipping. A little history of the trans; this is the 3rd rebuild. I had the transmission rebuilt 20k miles ago, about 400 miles post rebuild I ran into a 2-3 slip (same as before the rebuild), though mostly at low engine speed. It could also be a torrington bearing. If your transmission is slipping, you might notice symptoms such as: Unpleasant metallic noises; i. Nov 23, 2011 · I've already done a search for my problem and nothing seems identical, so here goes, maybe someone can help. 1st, the vehicle must meet certain conditions for lock up to engage. Dear Tranny People, I am Electric girl and need some help of mechanics to do a propper root cause analyse. mechanical I installed a rebuilt 4L60E in my 97 K1500/5. As the 4L60E ages, one of the most common problems that it develops is that it won't shift into overdrive anymore. Mar 30, 2018 · 4L60E NO 2nd. Nov 16, 2023 · 2001 4l60e fresh rebuild - no reverse or low. My buddy and I just rebuilt my 4L60E with just some new clutches, steels, shims, filter, and gaskets, nothing to in depth. The internet will say no, but I say otherwise. The 4L60E is a for speed automatic transmission with a . You will recognize the first half of the teardown, the rest I had misplaced it but Oct 18, 2016 · Freshly rebuilt 4l60e problems. It’s hard to be surprised anymore with all the possible things that can go wrong inside a transmission: circuit leaks, solenoid malfunctions, valve body problems, hairline cracks in cases, and so on. When accelerating from a stop there is a bump comming from the Oct 26, 2009 · 4L60e slipping in 2-4. Also, there are great videos on youtube, some of the best by Hiram Gutierrez, on the disassembly and rebuild of the 4L60E, which aside from the valve body, is exactly the same as the 700R4. 64″ torque converter) or 11. Make sure you have the converter lock points low enough, I believe around 40 in 3rd and 50 in 4th. They will have most of the Answers to your Questionswith a non-anecdotal flavor: Attachments. If the transmission is beyond repair, the cost to replace it can be upwards of $4000. I retest drive vehicle to conform, yes it slips going to 2nd and 4th "customer drove car harder than i ever have or would" . It shifts good into 2nd, 3rd, but when it shifts into 4th it slips and feels like it noses over. Not sure on those numbers but they are likely within 5-7 MPH. Without being able to lock, it won’t be able to facilitate the transfer of energy to the upper gears and the transmission will remain in 2nd gear. Always throw the single ring skf sprags in the trash and use the good dual ring sprag the later 700r4's used. Oct 4, 2009 · why is my fresh rebuilt 4l60e slipping? i just put a rebuilt transmission on a 00 sierra 5. third and OD seem to be OK (when May 20, 2009 · 4l60E Slow Reverse. I just finished rebuilding my 4l60e trans and am having issues. To my big disappointment it is slipping in forward gears. The 4l60e torque converter is designed to lock up primarily in 4th gear (can also be enabled to lock up in 3rd gear as well), so when it doesn’t lock, it’s quite noticeable. NickTransmissions said: You should be shifting into 2nd at or before 15mph. thought it could be due to a solenoid going bad but i don't know how May 16, 2019 · But cause non lockup of tcc. Booster Valve- A bad booster valve can leave you without reverse in a hurry. I have a friend at a body shop and bought a transmission out of a wrecked 97 pickup and installed Sep 13, 2018 · Hey everyone, Finally got my TH400 back in after my first rebuild. 4. Dec 26, 2003 · C4 Tech/Performance - 4L60E Slip in 2nd Gear. we added about 9qts and its a little above the hot line. Came in for the usual 3-4 burn up. 3. The trans has started to slip most noticably in reverse. Unlike forward gears, reverse work just fine. Today I got a transmission service done (filter,gasket,fluid) on my 4L60e. Pressure test the forward drum - make sure Nov 20, 2010 · Well 2800 miles after rebuilt my 3 and 4 is gone. It provides a direct connection between the input housing and the input sun gear. 7L a couple of months ago. Transmission must be removed and rebuilt. But I don’t want to scrap it because the 5. Has your 4L60-E lost all gears? Is this because of any leakage? Have you built the transmission yourself and missed something? What could be the possible causes for 4L60-E losing its gears? Oct 12, 2015 · 4l60e issues after rebuild, at my wits end! transmission detects a slip and cranks the line pressure up in order to prevent the trans from killing itself from low Dec 7, 2023 · Location. Back again. The 4l60e was burned due to a stuck check ball in the separator plate, and fried 3-4 clutches. I drove it daily and it shifted fine and never slipped. the tranny shop says that its Mar 5, 2019 · 4l60e acting like it's in neutral. A deficiency in the line or AFL pressure that Feb 24, 2022 · After getting my 07 Silverado trans rebuilt, it worked until it drank all the fluids, and after refilling the fluids, it began to function again. Although I'm not a tranny guru, someone should be along with more info. it took three rebuilds for them to get it to hold long enough to drive it home. If you have a 4L60E transmission that is hard to shift into first or second gear after a rebuild, there are a few things that could be causing the problem. Jun 4, 2021 · Jun 5, 2021. 5 Min Read. On my way home, it gave up. Also put a bottle of lucas in and it helped. Jun 16, 2013 · I have gotten advice in many things with this issue and I am trying to find the best way to go regarding my truck. first thing , you need to use a scanner to see if tranny computer is commanding tranny to fall or down shift from 4th to 3rd. I just put it back together again last night and now I have great shifting from 2 May 4, 2018 · Valve Body Issues- A bad valve body can make the reverse gear not work in the 4L60E. Just rebuilt my transmission during winter and just had a testdrive. So as the title suggests, I just recently got my transmission rebuilt after the 3-4 gears went out. Hard Second Gear – The third most common symptom of a failing 4L60E transmission is the difficulty in shifting to the second gear. The R&R man was certain that he had done his job correctly and that the rebuilder must have done something wrong during the rebuild. It features clutch-to-clutch shifting. Jan 12, 2020 · What you need to know about how to rebuild and upgrade GM's 4L60E four speed automatic overdrive transmission. Yes, Im wondering if you forgot to Jul 1, 2012 · 4L60-E No move after rebuild. $1350 from shop, $925 from a friend at GM who will drop it, get it rebuilt and put back in…. Afterward, my forward gear stopped working and I could only shift in reverse, moving forward is possible, but only at 3-4k rpm. A factory service manual will tell you what conditions must be met to engage lock up. 4th gear it was hard to maintain speed. First and second seem to be slipping horribly (i floor it and the engine shoots right to the redline with very little forward movement). Damage to the band, input/output shafts, sprag, etc. Also remember There is a difference between replacing parts and rebuilding something properly. 1. 3L won't shift in 4th gear anymore. 4L80e Saturday challange. New Jersey. Dec 31, 2018 · I cannot find an affordable transmission locally and don’t want to pay for a rebuild because the truck has 200,000 miles on it and it has lots of rust. Nov 13, 2011 · C4 Tech/Performance - 4l60e Problems. It lasted for about 30,000 miles then lost overdrive and drive. Another test is to see if it moves forward Jun 17, 2007 · 1-8-4-3-6-5-7-2 said: My friend has a 1996 K1500 with a 4L60E. 3l (4x4) and its slipping. How to start root cause analyse. The engine light come on due to the no shift. Reaction score. I've broken the transmission down to the low reverse seal ,cleaned everything good, replaced every seal in the correct location in the right directionall clutches where soaked in trans fluid Mar 4, 2020 · 4L60e slipping like hell after service. The low reverse clutch packs were burnt up. shift solenoids number 2. Rebuild needed? - I sure do love how this car runs, but it is beginning to let me know some attention is needed. The 1st gear works fine, then it will skip 2nd as he accelerates and then drops into 3rd. It was rebuilt by a local mechanic who has a really good reputation. If he lets off the gas some it will shift back into 3rd. A 4L60e is not a DIY friendly trans. It requires 48 lbs. Feb 10, 2008 · M. In addition to fluid being worn out from poor maintenance, fluid Apr 4, 2018 · If the TFT sensor is working, and the trans is over-heating, the TCM will not allow 4th gear operation. That will at least tell you what the PCM is telling the transmission to do. e. the problem that it has is, no tcc lock up at all and p1870 code. It will go shift back to overdrive but it will keep randomly dropping out of overdrive. at all. Tranny worked as advertised initially although the neutral/backup switch was buggered and I had to put tranny in mechanical neut … Jul 19, 2015 · This is a video of a 4L60-E Transmission complete disassemble and rebuild. Sep 21, 2022 · 4L60E Shifting Issues. If the computer is not trying to make pressure, then the transmission Dec 26, 2011 · Poor line pressure rise due to a leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Both when starting in OD, 3rd, 2nd and 1st. When it doesn’t lock however, RPMs will keep climbing in 4th gear. The weak OE 3-4 backing plate flexes during application, allowing heat to build up unevenly within the clutch pack’s limited space. The seal restorer may fix the last problem but probably remove and rebuild if needed. Put a bi-directional scan tool on it to see if a shift is being commanded or not. Feb 13, 2022 · These are the GM ATSG 4l60E-4l80E Transmission Diagnostics and Repair "Bibles"worth Downloading into a Folder and then referred to often for access to the"Professional OEM Straight Skinny". I've Jun 5, 2021 · Rebuilt 4L80e slipping in forward gears. Fluid Worn Out and Burnt. I replaced all the springs (accumulators Apr 15, 2024 · Nope - as long as that o-ring is there, you won't have any problems when it comes to wrong-gear startsIf you were to leave it out, you'd start off in third gear every time you put the transmission into Drive, D3 and bind up if you put it in Manual Low or 4th gear if you put it in Manual 2. The 4th piston does not have as much travel as the 2nd gear piston. Jun 4, 2020 · Here's what I found: While in 'D' the pressure (in first gear) stays around 125psi, then the same for the first half of second gear, then at about 2200 rpm (right about when the slipping starts) the pressure drops to 65psi (give or take) - maybe this would explain why the longer servo pin didn't help stop the slipping issue. After starting the car for the first time, I had it on stands and made sure the rear wheels moved as they should in reverse/drive gears. I have a 1997 k1500 4x4. It's a $45 part and well worth the peace of mind. My buddy used to work for GM. Overtime however, Dex III was phased out and GM released Dex VI in 2005. The second is so hard that it almost feels like a shift kit has been installed. Aug 28, 2009 · Rebuild est. Below is a list of common transmission problems with the GM 4L60E Transmission and possible solutions to repair. The average cost for a transmission rebuild is around $2000. Had reverse, and 1 and 2 on test drive, no third although commanded. pdf. Shifting is inaccurate or delayed Jun 16, 2013 · I have gotten advice in many things with this issue and I am trying to find the best way to go regarding my truck. I replaced 1-2 solenoid, 3-4 solenoid. When done the transmission felt great, had good line pressure - good to go - not so fast! 1000 miles later 3/4 gone, car was no Mar 2, 2016 · Reduce Harsh 1-2 Shift Damage. 2007 Silverado 1500 LT , 4x4 z71, crew cab, 5. PARTS USED IN THIS EPISODE:TCI Automotive: Auto . 5" 2600 stall street converter. Worn TCC Regulator Valve. 4L60E_80E_CODE_BOOK. Hello all. to overcome the tension of the 1-2 shift valve spring. It requires 8. Jul 31, 2021 · Not one, but two separate transmissions with the SAME problem. The transmission rebuilder accused the R&R man of breaking the pump during the installation process. 3 runs great and it has all new break lines. 8. This condition is worse when hot. 2nd the brake switch does affect lock up. . I have had issues slipping 4th on slight inclines with very little throttle. Many times, the cost of repairs can be Jul 5, 2022 · Cause 1. More than likely the reverse input snap ring has sheared or snapped off. It locked up and killed the engine. Mar 14, 2010 · Reman'd TC, and Full rebuild kit for the 4L60E transmission from Ebay. My 94 has been having trans issues recently. If the valve body ends up warped, or if the gasket fails, it’s entirely possible that the gear won’t engage. These prices can fluctuate greatly depending on the severity of the damage and the location of the transmission. Transmisson is sluggish to move. Expert tips and solutions for smooth driving. I put everything back in the way it came out, with 2 checkballs. First, check the transmission fluid level and make sure it is full. It turned out my t case had gotten stuck in 4wd without me knowing and was driven like that on the highway for a couple of hours, (I know I know Sep 4, 2023 · The problem was that 1st & 2nd gear worked absolutely perfect, clean shifts, even power, but as soon as it shifted into 3rd it felt like the transmission was slipping. Can this be repaired without a rebuild? Does anyone have a recommendation on who Apr 2, 2017 · heres some more info about all the common 4L60E problems n solutions. com/kidkevi?sub_confirmation=1 Mar 18, 2004 · 576 posts · Joined 2003. To help pinpoint the problem, a pressure gauge was installed into the line Mar 21, 2011 · I rebuilt my 4L60e over the last few weeks. Oct 24, 2022 · It means something is wrong with the fluid or maybe the clutch system in the transmission. Too many thing can go wrong , not checked or over looked by a DIY. 175k miles. if I drive it long enough, it will get hot and down shift to 3rd until it cools off. 3 . My 97 Chevy Blazer 4. There are many things that can cause non lockup . Besides, that's not why the 3-4 burned shortly after rebuild. Am thinking of spending the extra $500 and give it to someone that does the rebuilds everyday. neutral. The 2nd gear does not work at all. Its readings are superbly important for the proper work of the transmission. Try not to run or drive the car or further damage could result. 3L, 4L60E. I have a 98 Chevy K1500 Z71 with the 5. If it's shifting fine but getting hot at cruise, that would be my guess. Backstory: Transmission was rebuild 1. New clutch packs, pistons, new input drum, various hard parts that seemed worn, new pump, new torque converter, and gaskets. If it's not shifting, command a shift to see how it reacts. Download a free 186 page 4l60e rebuild manual pdf and procedures guide. One day, I drove the truck and noticed it started to slip real bad in 3rd and 4th. May 26, 2009 · 98 4x4 Suburban w/4L60E. now without my esp working thats only a guess. Since its release in 1993, Dexron 3 (Dex III) was the recommended transmission fluid for the 4l60e. Apr 4, 2013 · I paid 1300 for a rebuild shop to rebuild it and install it. The transmission slips when starting from a stop with the gear selector in 3rd or 4th. Another reason your 4l60 may be slipping is because the fluid in the transmission is well past its regular maintenance interval and is worn out. Oct 19, 2014 · Put moderate pressure on the "nipple" on the servo cover. May 24, 2023 · Not sure about the TH700, but the TH 400 didn't lock, but the 4L60E MUST lock. I ALWAYS replace the sun shell with a "Beast" sun shell on a 700 or 4L60E build. Dec 7, 2015 · 4l60e rebuilt butno reverse. #2 · Feb 10, 2008. Hi guys, I have a question for you, please: My 4L60e had a cheap, (rounded off tip) lower cooler line that popped out mid-trip on the highway, losing a lot of fluid. My 4l60e recently started dropping out of overdrive randomly when warmed up. that was 2-3 years ago. A&B solenoids are brand new. I pulled the pan and tested the shift solenoids all is good there. Careful breakdown, pictures, cleaning, took my time following all the steps putting it all back together. Sep 2, 2014 · How does the fluid look and its level? Do you mean that it has been slipping ever since it was installed? It could be a problem with the valve body, possibly something not done right during the rebuild. youtube. Machine both pump working surfaces, install new rotor guide and vanes along with a sonnax boost valve kit (4L60E-LB1). Aug 28, 2009 · I rebuilt a 4L60E it had worn clutches. If I run up through the gears using the column shifter, the shifts are "normal" and I don't get any slipping in any gear regardless of load. Transmission has harsh1-2 shifts even after P0894 DTC is cleared. This is a problem with some sensors like VSS, for example. all the pistons were in good shape, no cracks or anything. Odd, I don't recall there being a O-ring like that on the back of the 4L60. 4 quarts (11. Jul 4, 2023 · #FixSlip #4L60e #2ndGear~~~~~ Subscribe: https://www. The 6L80/90E transmission consists of five clutch sets (1234, 35R, 456, 26 and LR), a planetary set, and a low clutch sprag, which provides six forward Nov 11, 2006 · The sun shell tangs get spread out from being driven by the reverse input drum. As Kutzler said above, pull the 2/4 servo cover and inspect the small piston, and sealing ring, that ride inside the cap. Once in 3rd, if the transmission downshifts into 2nd it will just rev the engine and not go anywhere. 4 quarts (9. The booster valve could also be an issue. It did have a lazy 1-2 shift and a slight delay and bump on the 2-3 shift. This is by far the most common problem with the 4L60E transmission; gear slippage. Heres my problem. I had 3rd gear slipping issues, so here I went. Sep 2, 2020 · Though the shell is supposed to be one piece, not only can it break off, but it can also strip out the splines. Thanks in advance for all replies. Slipping in first and Second - Im definitely stumped by this. I have a 2000 1500 w/ a 5. 4L80e Saturday challenge. Burnup is the common result. Some late model 4L60-E transmissions can set a P1870 or P0741 depending on how the computer is programmed. or more, the 1-2 shift valve will be stroked into first gear. This covers all you need to know about the ins and outs of rebuilding a 4l60e. 4l60e Slipping After Rebuild Jul 22, 2022 · The cost to repair a 4l60e can be quite costly. GM uses code “P0742 TCC Stuck On” when the computer detects the TCC has not released. While in drive or reverse the truck only creeps forward with very little power. Once the engine is started and line and AFL pressure have generated 48 lbs. Feb 9, 2022 · Use the scanner to see if the computer is trying to make pressure in the transmission. 70 overdrive. I recently rebuilt my 4l60e, for my Jeep LS swap. Rebuilt the 4l60e in my counsins 1996 chevy k1500 and got it all back together and now it won't move. my question is this: Can I replace the burnt out clutches without have to tear the tranny down completely? Dec 13, 2010 · On the flip side: transmission parts failures , screw-ups, mistakes from the lack of knowledge are expensive. I went through everything with the help of an ASTG service manual and many Mar 3, 2018 · Bad Sprag. The trans fluid does not smell or look burnt. IF they are spread out the sun shell needs to be replaced. Aug 20, 2018 · If it is slipping, it won't be long before it flips over. The recommeded transmission fluid for the GM 4l60e is Dexron 3 / Dexron 6 / Dex Merc. The truck is a 1996 K1500 and I am the original owner. 3 and a 4L60E. She told me 2nd gear was slipping. Never leave out the 1-2 checkball. It can also be caused by the sun shell breaking. Moves and shifts but acts like a rubber band. First rebuild was due to 3/4 clutch burn up was rebuilt by a local shop with a good reputation rebuild during pandemic cost me $3200 took 6 weeks and Oct 21, 2016 · The General Motors 6L80E and 6L90E 6-speed transmissions were introduced in the late 2005 General Motors truck line as a successor to the 4L60E and 4L80E. Trans is in 98 Astro 2wd(Moms van) Drove good for 30ish miles. RPMs would go up, but the vehicle would not accelerate. Things you want to pay attention to are lip sealing Apr 22, 2016 · I have never seen a solenoid problem cause a 4l60 to not shift to third. #2 · Mar 18, 2004. Bought a rebuilt transmission and installed and flushed coolant. There are just so many different things that can cause the same outcome in a transmission Apr 5, 2017 · This is also a pretty common issue with the 4L60E. May 2, 2010 · This is my first 4L60E rebuild so I'm still learning the trans of course *yay*. I also installed a new FTI 9. When the car shifts to second, it is not crisp, but kind of slips into gear. I had some issues before - here is my previous post 200 miles after rebuilt --> 200 miles after rebuilt Grrr noise in tranny. Hello! Another 4l60e issue. Its well worth it to learn to rebuild you own transmission if you have any plans on keeping the s10 for any more then 2 years. Tranny. I test drove vehicle everything fine, customers drives feels a slip going to 2nd gear. Mar 18, 2011 · The 4L60E transmission weighs 146 pounds dry, and 162 wet. Rebuilt trans ,kit with steels ,new converter, new band and filter. P0742 is most often encountered on 4T40-E and 4T65-E Oct 12, 2018 · 97 chevy silverado 4x4 4L60E Transmission started slipping and was clearly going out. Feb 27, 2007 · Help! 4L60E no rev after rebuild. The builder thought it was an electrical issue, I lived about 2 hours away and didn't drive it often (at the time), so I Aug 16, 2023 · Yank it. Three of the most common problems found in a GM 4L60E transmission are: 3 – 4 Clutch Pack Failure. Trans overheated blew out about a quart of fluid. Apr 9, 2024 · At cruising speed the TCC still has a slip around 150rpm and sometimes throws the code P0894 (Transmission component slipping) 2. 4l60E trouble. 5 year ago, but has been having a lot of problems Mar 21, 2010 · 4l60 issues after rebuild. moentte999 Discussion starter. Apr 3, 2017 · 4L60E Not Shifting into 4th Gear. Overtime, transmission fluid breaks down and loses its friction properties, and this causes slipping symptoms. Jul 25, 2018 · The one on my old 4L60 was in perfect shape so I just used it. The most common problem is probably going to be the low reverse clutch pack. my guess would be one of two things tps trouble number 1. It will drive fine and stay in overdrive for a good 10 miles from a cold start, but then once it is warmed up it will jump out of overdrive and downshift. Jun 2, 2020 · 4L60e slipping issue. 7L Vortec V8 under the hood and the 4L60E transmission. It began slowly, when i noticed it was hesitant to upshift going up a hill, but after giving it a bit more throttle it eventually shifted. took me all of 3 hours to reassemble the trans AFTER the time of disassembly and cleaning and what not. 81″ torque converter) of transmission fluid, Top 30 Common 4L60E Transmission Problems and Repair. Without overdrive, your vehicle turns into a time machine and takes you back to an. Backstory:Two separate 4L60E transmissions with May 5, 2018 · 4L60E Transmission Problems. 1st and 3rd only, no 2,4 or R: Sunshell is fractured or splines are sheared off. 3rd and 4th gears are missing. I did a rebuild kit on 1995 GMC K1500 because of slow/weak reverse. So awhile back I put together a list of things I need to do on the Silverado i bought a few months ago. 4L60 E Sprag. March 5, 2021. The car is unable to shift properly into some gears, like reverse. The RPM's just rised but no up shifting. The fluid is clean pink and appropriate level. While I was there new fluid And filter was put in. eg: 5000rpm 4th no response until i pedal or grab 3rd. Stop the flex and you stop a leading cause of 3-4 clutch failure. If a solenoid is shorted or open, the computer sees this and locks the trans into third gear, which is fail safe. Reverse is really firm!! 1992 case, red alto and kolene steels, Transgo HD2 kit and internally dual fed, fully rollerized, steel 4l60e slipping 4th on light cruise. If you use the gear shifter to keep it on 2 (or Aug 5, 2022 · Whether you’re building a 4l60e for the first time or a seasoned veteran, this rebuild guide will help with all steps of the process and provide in-depth details about the 4l60e. About three hours counting getting it up on jackstands, pulling the rear mount, driveshaft, draining fluid, removing tailhousing, putting it back together and picking up the tools. Considering your admitted limited experience with transmission repair,when you installed the pump, damaging the sealing rings on the pump is the most likely thing that may have happened. Overhaul the valve body; convert the PWM to an on-off using whichever method you prefer. Damage to the 4th piston assembly will cause a solid 1,2,3-but slipping, or no, 4th. Jan 25, 2016 · Alright so today i lost the 3rd gear on my 4l60e. After rebuild we still had same reverse issues so we took it apart and put in new spacer plate and different 2-4 band. 500 boost valve, corvette servo to wake it up a little. The transmission goes mad, the speedometer reads zero. 17. Sep 10, 2009 · I am now debating whether or not to try to rebuild my trans myself. whining, grinding, or screeching. Sun Shell- A broken sun shell will cause the 4L60E to lose reverse. Like. Jun 6, 2018 · Check for leaking or missing O-ring at input housing to Forward clutch housing. After filling the transmission, idling, checking and filling somemore (while in park) I finially placed it in reverse to start the process of working through the gears. If the fluid level is low, it could be causing the gears to not engage properly. The 4L60E valve body is in second gear by default when the engine is off. So i pull trans back out find no problem Jan 20, 2014 · 66 posts · Joined 2010. I bought a transmission rebuild kit and installed everything right, but it's not shifting into second the way it should. Under moderate acceleration in reverse there is a shudder along with slipping. The overdrive gear is gear number four. Hi all, first post after a lot of reading. Reman the pump; never rebuild a trans without going through the pump and valve body. #1 · Jan 20, 2014. #1. If you give it enough gas, it'll shift back into 2nd and keep on trucking. we blew out the tranny cooler. eg: slight accent on the road roll off throttle into ascent and speed drops off, rpm climbs like severe clutch slip. Replaced band and all seals. filled with atf and the pump is working. new trans came with new converter and fittings. I have a 2004 Yukon with stabilitrac AWD. Remove, disassemble, inspect found 3-4 burned up, stator bushings worn, abnormally clean. Never reduce the 1-2 accumulator piston stroke. Usually when they are bad, they will let loose on kick downs, but they usually do not grab until the rpms drop. Mar 6, 2024 · 1. T. Reverse is really firm!! 1992 case, red alto and kolene steels May 18, 2010 · The ATSG book is a must have for rebuilding this unit and the GM book is the most detailed technical publication I've found yet. If the cover will recess into the transmission 1/4" or more this will prove the band is worn out and most likely the reason there is no 4th gear. If you end up with a bad sprag, the 4L60E won’t be able to shift into 3rd or 4th gear. Feb 27, 2023 · 4L60E Hard 1-2 Shift After Rebuild . Feb 15, 2024 · In this video, I do an autopsy on a 4L60E that I recently built for a customer which lost 3rd gear within only 200 miles! Unfortunately, these things occasio Nov 1, 2018 · November 1, 2018 Roadkill Customs Technical Info. 6,798 Views. May 23, 2008 · A rebuilt 4L60E in my 97 K1500/. Apr 9, 2024 · NickTransmissions said: There's no spring tension on that valve train, unless you install Transgo's TCC valve or the Fitzall valve (or Sonnax's oversized valve but that requires a reamer to wallow out the bore to fit their os sleeve/valve kit). Question for the transmission guru. While Dex 6 is designed for newer vehicles and transmissions, it is backwards Sep 15, 2003 · The 4L80-E transmission uses the P0741 for 3rd gear TCC slip, and P1870 for 4th gear TCC slip. Apr 15, 2024 · Nebraska. ql wf hu qe ag lq ab cb ei wd