Common 4L80E Problems Torque Converter Not Locking Up: The torque converter on most modern automatic transmissions is made to lock up in order to allow for a physical connection between the engine and the rest of the drivetrain
Maryland 4l80 starts out in 1st gear. Shifts into second, then doesn't shift up any further. While on the road, I can shift from D into 2 and it will downshift ONLY when going above 30 MPH - The transmission is defaulted to second gear (4L80/85-E). - The transmission is defaulted to third gear (4L60/65-E). - The instrument cluster is inoperative. Possible DTC's: P0720, P0753, P0758, P0785, P0787, P0973, P0976, P1860, P2761, P2764, and P2769 may be set depending on the vehicle
Shift problems with 4l80E. My transmission in my 1993 motorhome with a Chevy 4L80E (only 7000 miles on motorhome) will not shift into 3rd gear. The RPMs will jump up but the ****** will not shift. After that is set code 81 and will go into limp mode It's crucial when diagnosing a transmission pump or a torque converter. Make sure the filter's good before replacing the pump. Diagnosing a transmission is the same as anything else; it often ends up being a process of elimination. Make sure it's not a problem with the engine before troubleshooting transmission noise or vibration
2001 GMC 2500HD 4L80-E Reverse servo extension for a quick fix to get back on the road without pulling the transmission out and down. This is not a permanen.. The Novak Guide to the GM 4L80E Automatic Transmission Introduction. The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH400 automatic transmission, and is based heavily on the 400 in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls 1 Answer 4l80e shifting problems Sometimes have to rev 3000 rpm to get from 1st to 2nd. Other times shifts at 20kms per hour Just put a re-man 4L80E in my 99 3500 chevy and within 60 miles its already burnt the fluid. I don't have a tranny temp gauge in that truck so i wasn't able to monitor that. I put about 20 miles on it and checked the fluid and it was fine. I did some sanding during that 20 miles but no pushing.. The biggest difference is probably the size & the weight between the 4L60E and the 4L80e transmission. The 4L80e is much larger and heavier than the 4L60E. The 4L60E has a weight of 150 lbs without fluid and a length of 23.5″, while the 4L80e has a weight of 236 lbs and a length of 26.4″
We strongly recommend taking Line Pressure readings when diagnosing transmission problems, especially a slipping or no reverse concern. To perform the line pressure tests an analog dial type gauge 0-350 or 400psi is required. An alternative type of gauge is a DVOM or scope with a pressure transducer. Pressure specs Hello. I have read what threads I can on this and can't seem to solve the issue. I had a 4L60E in the car and everything worked fine, but when I upgraded to a 4L80E from Hughes performance, I can't get the transmission to shift higher then 1st gear. The car shows that it's shifting from 1 to 2 to 3 to 4th, but it isn't, it just stays in 1st
I have a 1994 Suburban 2500 with a 454 engine and a 4l80e transmission, I lost forward gears at highway speed, no problems before that, just boom, gone. I am having a problem with a 92 GMC 6.5 turbo 4L80E. I have paid to have it rebuilt after reverse went out and replaced it with a 4L80E from a 98 2500 6.5 4L80E Updates Many electrical changes have occurred in the 4L80E transmission for the 1994 model year, these include: • A new pressure control solenoid. • New shift solenoids, A&B. • A new wiring harness and connector. • Changes in vehicle speed sensor circuitry and components. • Addition of a 4WD switch on all 4WD models
Certified Transmission offers the following resource for those interested in knowing vehicle applications for the remanufactured 4L80E transmission. To view applications begin by selecting the vehicle manufacturer listed below. Reset Searc Transmission support mount. Ect.. Click to expand... Losing Overdrive when the engine gets warm. I have a 2001 2500hd 6.0l gasser with a 4l80e. I want to install a switch to manually lockup the tcc in first gear low range for sled pulling. The 1-2 solenoid or A as it is called and the 2-3 solenoid or B both send pressure to the 4th Gear.
A common problem on many General Motors cars is the Torque Converter Clutch fails to release and causes the car to stall when it comes to a stop. Most of the time it is a stuck Torque Converter Clutch (TCC) solenoid, but this is not the only cause of this problem The 4L80E is not without problems though, as hard shifts and losing the reverse gear are some of the most common problems reported from this transmission. 4L80E Performance Specs The 4L80E is a manual transmission that has a maximum engine input torque of 440 lb-ft and is capable of providing an output torque of up to 885 lb-ft Dismantle the transmission to the point of being able to see the direct-clutch drum in the case with the valve body removed. Make a simple air test to the direct-clutch through the case to verify that both the feed passages apply and hold. If it fails this test, remove and verify problem areas in the drum or on the support, and retest 4L80e transmission problems Sign up for FREE! Become a GM-Trucks.com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM.
Nowadays it seems there's an automatic transmission for just about every style, application, and budget you can imagine. One tried and true transmission, the TH400, received a slight makeover into the 4L80E. We wanted to took a closer look at it. The 4L80E is the successor to the Turbo Hydramatic 400 transmission 4l80e no od the transmission control module has to see a signal voltage from the tps between .04 and .05 volts. to allow the transmission to change to od. the tps costs about 160.00 at most autoparts. i had the same problem i changed the tcm w/cpu rebuilt my tranny had frequent transmission fluid changes. but after extensive troubleshooting. it. Just put a re-man 4L80E in my 99 3500 chevy and within 60 miles its already burnt the fluid. I don't have a tranny temp gauge in that truck so i wasn't able to monitor that. I put about 20 miles on it and checked the fluid and it was fine. I did some sanding during that 20 miles but no pushing.. Some vehicles with a 4L80-E transmission may exhibit the following problems: converter shudder, burned converters, no TCC clutch apply, and/or code 68/39 or P1870/P0741. Often these complaints can be caused by the constant oscillation of the steel TCC regulator apply valve wearing the aluminum bore, resulting in a loss of converter apply oil.
4L80E. The 4L80E was introduced in 1991. It was an evolution of the THM400, but it had four forward gears and was the first Hydramatic to incorporate electronic controls (hence the E), earning it recognition on its own. The 4L85E is a heavy-duty version of the 4L80. 700 R4/4L6 4L80E Transmission problems. The automatic gearbox 4L80E differs by the improved reliability and is able to operate under normal use for 30 or more years without repairs. From weak points it can be identified only damage of the clutch which at frequent throttling when moving from place can quickly go out of service my 2000 4L80E connected to my 6.0L chevy, will pump fluid to the tranny cooler and all the way back to the tranny, but does not want to go back into the tranny from the line. I know this because i took off every piece of hose from start to finish one at a time and checked to make sure fluid.. SHOP THIS TRANSMISSION NOW4L80ELevel 4 4L80/4L80E- Rebuild - Rated to hold up to 1200HP Convert your 4L60E to a 4L80E!We provide sales and technical support 7 days a week from 8am to 10pm EST. Call us at 770-781-0949. *(Within Continental U.S. to most business addresses or nearest freight terminal) SUPER HEAVY DUTY 4L80E Rated up to. Here is a common complaint concerning the 4L80E Chevy transmissions: Question: Hay there,please help me out. Driving without problems for 8 years a 3500 K dually 6.2 diesel from ,91 now ,tranny 4L80E. But sinds twoo weeks it has no reverse anymore. I mean to say, when i shift in to R , i feel the klick and it seems it will go reverse but it not.
The GM 4L60E/65E/70E-4L80E/85E Diagnostic Code Book is designed to provide the technician with a step by step diagnostic approach to each and every transmission code available from 1991 to the 2007 model year A 4L80E doesn't use a 3-2 downshift solenoid like a 60 does and there are two other wires that have to be re-pinned to convert from a 4L60E to a 4L80E but I would have to look at my notes in the shop to remember which two they are and what they control. I doubt it is the transmission as well Common 4l60e Transmission Problems Below is a partial list of some of the most common 4L60E transmission problems: Slipping, Slow or No Reverse Available Many owners find that the lo-reverse clutches are beat up or worn out. There is also a fluid leak located in the reverse apply circuit. Additionally, there is a broken sunshell The 4L80E is the descendant of the Ole Reliable TH400 transmission. It shares many components and design features. At Jake's Performance the 4L80E is our most popular transmission. We have built them for applications ranging from heavy towing vehicles to 1800+ HP street/strip cars. The 4L80E has proven reliable like it's predecessor There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC. When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to disengage
I had the 4L80E in my truck rebuilt after a major planetary failure. Now it runs in the 200-220F range with no load and no trailer under normal driving. If I keep the rpm's down (try to stay under 2000 everywhere), it will run more in the 150 range. But once it starts heating up, it doesn't.. Description. 4L80E Torque Converter Clutch Regulator Valve Kit #34994-01K #2TCC. Some vehicles with a 4L80E transmission may exhibit the following problems: converter shudder, burned converters, no TCC clutch apply, and / or code 68 / 39 or P1870 / P0741. Often these complaints can be caused by the constant oscillation of the steel TCC regulator apply valve wearing the aluminum bore, resulting.
It has the 4L80e transmission. 67,000 miles. When cruising at highway speeds. I get the code P0894 - Transmission component slipping. The makes the transmission operate at high pressure which leads to rough shifting in 1-2. When I turn the code off, it seems to drive fine until it trips again, only at faster speeds on the highway 4l80e transmission overheating the transmission overheats after towing about 25 miles, code 1810 comes up on scan, - Chevrolet 2005 Silverado question. transmission problems 4L80E 2005 silverado problems 4l80e problems the green mile bypass pressure switch. Having problems with your 4L80E GM Automatic Transmission that is used in heavy duty Chevrolet and GMC pickups, vans and motor homes. Need Illustrated parts drawing to assist you in identification of the parts that you might need. Just identify the parts you need and give us a call 4L80E, 4L60E,and TH400 Transmission Dimensions The Driveway Engineer helps you answer the 4L60 vs 4L80 transmission question for your LS swap, but cautions; stop wasting money on built 4L60' 4L80E Transmission with Free Shipping, new lower prices on 4L80E 4x4, 4L80-E, 4L80, Heavy Duty 4L80E and other Monster 4L80E Transmissions
The 4L80E transmission was mostly used in 34- and 1-ton trucks and larger SUV applications beginning in 1991. The E means that it must use an electronic ECU for control, as it will not function. Rebuild a 4L80E Transmission with the TransGo HD2 Kit. One problem, if there is any, is the sheer weight of the unit and the cost of a quality torque converter. But for the power this thing. Therefore you need to repair any leaks to prevent the same problem in the future. Burnt Transmission Fluid. Transmission slipping can also be caused by burnt transmission fluid. The burnt fluid smells like burnt toast and has an abnormally dark color. If the transmission fluid burns, it becomes ineffective
4L80E 1999-2009 2WD TRANSMISSION 5.7L 6.0L 6.5L 7.4L 8.1L. and allows installation of this special high quality valve. This problem is the NUMBER ONE most overlooked issue by other re-builders. One indicator of this issue is the 2nd gear starts, 3rd neutral condition, no 4th gear, codes 68, 85, 86, and 87 and direct clutch breakage.. .0 Electronic Transmission Wiring (Holley EFI Wiring Manual LINK) Holley Dominator EFI currently supports the use of 4L60E, 4L65E, 4L70E, 4L80E, and 4L85E transmissions. PN 558-405 is a fully terminated harness for these applications. The following reviews installation of this harness Service Bulletin - 4L60E & 4L80E - GM (Automatic Transmission) YOUR WARRANTY DEPENDS ON YOUR ADHERENCE TO THESE GUIDELINES. Shift Shaft Identification. 1 3/4 Shift Shaft. 3/4 Shift Shaft. 4L80E Vehicle Applications: 1991-2013 Chevrolet C/K/Chevrolet Silverado/GMC Sierra V8 A 4L80E is a slam dunk behind a SBC in a '55 Bel Air but a 6L80E is not. The 6 speed takes a fair amount of trans tunnel work and my Holley Dominator ECU can't control it. I think the extra gears and the taller overdrive would be nice but I wonder if it's worth all the effort
4L80E Automatic Transmission to fit all car and truck applications * This is a generic listing we will obtain your Vin number in order to ship the correct unit to you Fully remanufactured valve body, with complete system correction and recalibration kit, improves pressure control and shift quality Introduced alongside the original 4L60 in the early 90â€™s the 4L80E was designed for large trucks and is designed as a heavy duty unit, rather than a transmission for smaller cars or even some pickups. Applications that use this transmission include the 8.1 L Avalanche, the Tahoe, and the Hummer This TransGo 4L80E SHIFT KIT® Valve Body Repair Kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission. Common complaints on this transmission soft 2-3, no upshifts, burnt direct clutch, broken hard parts due to high pressure, low pressure due to solenoid filter breakup as well as gear ratio and. Since then I've prepared many 4L80E transmissions for competition using these methods. So this article provides a tried-and-true procedure for converting any 4L80E transmission to full manual control, eliminating the need for a PCM. The 4L80E uses shift solenoids A and B to control upshifts and downshifts in all forward ranges
4L80E 4L85E Four Piece Molded Piston Kit 1997-2002 ALTO Number 031670C $ 56.00 Add to cart; 4L80E 4L85E Hard Input Shaft Made from 300M Steel $ 398.00 Add to cart; 4L80E 4L85E Heavy Duty 300M Input Shaft for Applications Up to 1000HP Sonnax 34670-01 $ 496.63 Add to cart; 4L80E 4L85E Transmission Connector Pigtail $ 39.00 Add to cart; 4L80E and. The 4L80E is a truck automatic transmission that was introduced by GM in the early '90s. It basically uses many of the same internal components as the TH400 but has an overdrive Fourth gear and. . These problems can be caused by excessive EPC torque signal pressure 1996 GMC K1500 6.5 turbo, transmission problem (4L80E) 3rd Gear and Reverse only. First time I noticed any problem I selected 1st gear whilst travelling across a hay field and it felt like transmission was binding up (like transmission brake was on). Selected D and truck felt OK till I drove onto the road and realised no shifting, stuck in 3rd.
.0, GM 4L60E, E4L65E, 4L70E, 4L80E, Chevy, Lap Top Compatible, Kit. Part Number: FST-30382-KIT Not Yet Reviewe Transmission Plug and Play Adapter Harness Connector Fit for 4L60E to 4L80E LS Swap Silverado Sierra Trans, Wire Adapter Harness Kit Compatible with 1998-2006 Transmission 4.5 out of 5 stars 14 $59.9 Re: 4L80E low/reverse slippage Aug 07 2017, 3:11pm just a heads up on this topic.I thought my 4L80 was going out the window too, slipping in low and reverse.....My tech checked and found I had a bad throttle position sensor....replaced it and its as good as it ever was Automatic Transmission Rebuild Kit, High Performance, Gaskets, Seals, Band, Clutches, Filter, Chevy, 4L80E, 30-spline Input, Kit. Part Number: SUM-70506 The transmission is a Gm 4L80e. It won't shift out of first and I've done everything from replacing the TPS to testing the TISS and TOSS. If anyone has an idea of what the problem might be please reply with an answer. Thank you for your hel
4l80e shifting 2 Answers. I'm having shifting problems during hard acceleration from a start and when tring to accelerate when already at a speed when the transmission downshifts. The truck is a 2002 chevy silverado 2500HD w.. . Wont hold in 2nd gear. no codes . Gen 3, LS2 with 4l80e. PSI conversion harness and PCM mild stall convertor. Still needs some engine tuning but trying to get the trans working first. Speed sensors and solenoids have been replaced. Still same problem The problem is, the 4L80E has a 32-spline output shaft. RacingJunk is going to walk you through the steps of replacing the 27-spline input shaft on your transfer case with a 32-spline input shaft that will mate up perfectly with your new/rebuilt 4L80E I'm having shifting problems during hard acceleration from a start and when tring to accelerate when already at a speed when the transmission downshifts. The truck is a 2002 chevy silverado 2500HD with a 6L and 4l80e. Accelerating slowly from a stop it shifts fine . Accelerating fast it won't shift gears . watching on the computer it never is not being told to shift by the pcm
. It has a positive displacement pump as opposed to a variable displacement, it is heavier, has more rotating mass, more clutch drag, and on the surface would seem to eat HP. The biggest loss would seem to come from the heavier rotating mass Updates to the Transmission: Updated TransGo Actuator Feed Limit Valve Also included is the TransGo Actuator Feed Limit Valve which requires a special reaming tool, that re-bores worn out aluminum 4L80E valve bodies which is typically an issue when time for a rebuild, and allows installation of this special high quality valve The 4L80-E (and similar 4L85-E) was a series of heavy-duty automatic transmissions from General Motors designed for longitudinal engine configurations. The 4L80-E was heavily based on the Turbo-Hydramatic 400 first produced in October 1963, adding electronic controls and an overdriven fourth gear. 4L80-Es were optioned only in Chevrolet/GMC pickups, Suburban 2500s, vans, and commercial. You will need a flexplate and spacer from ¾ ton GM truck that originally came with a 4L80E. Your other option is, if you're going with an aftermarket torque converter anyways, is to have the torque converter made with the correct offsets and mounting pads to bolt up to the stock 4.8/5.3 flex plate. Circle D can do this no problem A 1970 Chevy automatic runs fine, except for trans fluis leaking. The fluid is at the correct level, but when running the car, the fluid will rise and pour out from the top of the trans filler tube. This is not a leak around the trans filler tube, as the fluid actually comes out from the top
GM 4L80E Transmission Shift Problem. Thread Tools Search this Thread #1 07-16-11, 06:17 PM R. rebel. Member. Thread Starter. Join Date: Feb 2002. Location: USA. Posts: 86 Received 0 Votes on 0 Posts GM 4L80E Transmission Shift Problem. I'll keep this short. Transmission shifts perfect--THEN-it drops out of high gear to low gear without warning.. 4L80E Converter Installation When installing a torque converter into a 4L80E transmission you can follow the standard GM torque converter installation instructions. This is a very straight forward installation in most cases. If you are installing this behind an earl two problems with the 4l80e one could be line pressure, the other the 80e has a fail safe that wont let the trans shift to reverse if it senses a speed of greater than 8mph. i would first unplug the main plug for the trans, it can leak fuild into the plug and short the pins and cause all sorts of problems. if you see no fluid try to drive it with the plug unplugged in reverse. this will.