4l80e second gear start Power to About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright May 12, 2025 · 4L80E Transmission Gear Ratios. As the trans temp warms Oct 3, 2023 · Obviously, the first symptoms are the ones that brought you here, to this page. Jan 4, 2012 · I just took my 4l80e for its first test drives. ;) I've done a lot of searching on the web and have found conflicting info on the root cause and what the fix would be. 0 and 4l80E. Trans never been touched. Trans always shifted smooth, even now with only 1st and 2nd it shifts smooth. PSI conversion harness and PCM mild stall convertor. 1st gear only. I brought it back to the shop last week because it starts in second gear. 0l 4l80e 103000mile truck does not want to shift right into 2nd gear. Jul 20, 2010 · Put a 3400 circle D 258mm converter in with the new trans. The case is die cast aluminum. Oct 14, 2014 · Now it has second gear under very light throttle, barely accelerating and the computer up shifts roughly 10mph or so, second will engage and holds in second gear even if I give up to 25-50% throttle (haven’t tried higher). This Jun 7, 2021 · I've gone on a few short test drives and have noticed the transmission is not shifting. Limp Mode. The car is in 2nd gear only, from what I have seen it is in safe/limp mode. Ground to J4 harness is good. Jun 23, 2013 · My sons 1995 K2500, 6. Nov 16, 2018 · This valve body allows transbrake application in both first and second gear ranges. Im sure if you could take off in 2nd gear at WOT it would do the same thing. May 24, 2023 · Only 2nd Rev Limped to camp. 06-03-04 10:08 AM - Post# 456812 In response to scrambldcj8 My truck always starts out in 2nd gear automatically. This looks a pretty good trouble shooting manual. So at a stop light I put it in 1st gear and it jumped to 2nd before I move the shifter. 4L80 will act like it down shifted to 3rd when 4th gear drops out. Aug 3, 2023 · 2nd: 1997-1998: First year of rear-gear train lube redesign; return cooler line fitting relocated to center support to lube gear train 'first' First year of 2nd generation valve body assembly; front-to-back lube transfer pipe replaced with shorter, narrower transfer pipe from rear valve body/AFL to case rear bushing. 48; Third: 1. Subject: Whine Noise In First And Second Gear Models: 2002-2007 Chevrolet Avalanche 1999-2008 Chevrolet Express 1999-2007 Chevrolet Silverado, Suburban 1999-2008 GMC Savana 1999-2007 GMC Sierra, Yukon XL with 4L80E (RPO MT1) or 4L85E (RPO MN8) This PI was superseded to update recommended field. I suspect it may be a hung 2-3 shift valve, but I would think that would make it start in OD when in the D position. 07; 4L80E Transmission Identification May 10, 2024 · Alost always when I see a no 1st gear complaint it is AFL based 1st gear is both solenoids ON 1-2 has to shuttle against a spring 2-3 does not With low AFL pressure, it will shuttle the 2-3 shift valve, but won't have enough "strength" to shuttle the 1-2 against the spring When that happens, you get 2nd gear. Sep 29, 2021 · Drove, only up to 2nd gear. Nov 3, 2016 · I would like to keep my automatic shift setup, but want to be able to place the shifter in second gear to do a burnout starting in 2nd. 48, second gear:1. Apr 5, 2020 · I recently acquired an M1123 with a rebuilt GM transmission dated 9/10. Here is the gear ratio of the 4L80E transmission: First gear — 2. I heard if the transmission looses power this will happen. 6. I drove it for about 100 miles, and everything was fine. 07. D1 range driver has full manual control. Jun 23, 2013 · I know this is a LT1 forum butMy sons 1995 K2500, 6. Re: 4L80E won't stay in 1st gear or start in 2nd. While it is known for its durability and reliability, it is not immune to problems. . Drive temp tranny. If the 4L80E is only working in second gear and reverse, then it has gone into limp mode. Please discard PIP3259H. 4L80-Es were optioned only in Chevrolet/GMC pickups, vans, and commercial vehicles, and the Hummer H1. Die-cast aluminum is the transmission’s case. Jul 9, 2021 · You mention that the transbrake will not work in 2nd gear but that sort of contradicts this from the manual "First, second and third gear start if desired. 3) SES light comes on intermittently, but doesn't stay on for more than 10-15 seconds. (2-3 valve IN, 1-2 valve OUT) Sep 6, 2016 · All of this extra room allows for added durability while retaining four forward gears and reverse. When I purchased the truck the transmission had to get rebuilt. 2 seconds). 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. To better understand the nature of the problem, you should pay attention to other symptoms. Nov 27, 2024 · I have a 4L80E, being controlled by Terminator X Max. Usually after warm up , the 4th gear will drop out if the "A" solenoid is a problem. Feb 21, 2025 · Specifically, the 4L80E transmission has been noted for its durability, but it is not immune to failure. perfect shifts, just like it always had Anyone want to have a look and see If i am missing anything before I tear into the trans. I can get up to 45mph so I think its stuck in 2nd and reverse works fine. lbs. 95 GMC Sub 4x4 - K1500 - 6. 2) Recent purchase, 2-3 months ago. the drive train in my opinion is not strong enough for full throttle 1st gear off the line with a loaded dually- Aluminum t-case, Aluminum Jun 12, 2022 · I bought a 1995 gmc 2500 4x4 last fall with a 5. Would there be anything wrong with launching a stock 4l80e in second gear? It's a 2300lb, 400hp car Nothing crazy. About 30% of reported problems involve slipping gears, which is often linked to low fluid levels or worn components. 5 Burb (mild Quadstar Tune for the past 100k miles), 200k+ miles with a considerable amount of towing during it's lifetime, been rock solid all this time but nothing lasts forever! Started having 1-2 shift issues, under part throttle it starts to shift into 2nd, kinda half Sep 17, 2023 · Hi, I have a new to me 96 GMC K2500 Suburban with the 454 and 4L80e 195k on the clock. The 4L80e uses four forward gears and one reverse gear in the following ratios! First gear:2. Unlike Dec 1, 2008 · Drive it one time and you only have 2nd gear, the next time I start it, it shifts fine. not something i am familiar with. 00, Fourth: 0. Nov 25, 2013 · Ive noticed in the morning when im leaving it feels like 1st is slipping. Cost of Repairs 4L80E Second Gear Starts A second gear start complaint (that often goes away when you step on the gas) is often caused by poor shift solenoid "A" pressure. I need some help writing a tune for the TCM to make the truck start in 2nd gear with the tow haul on and 4lo only. no codes . The first part of the Service Bulletin was completed at that point, but the loud whine remained. 1,2,3,d and od is all the same gear. Nov 30, 2019 · If you have a weak or leaking "A" shift solenoid. It wont shift at all, its always in the same gear no matter where you have the shift lever. Cold Tranny. Even if I put the shifter in the 2 position, it still shifts to third. D2 range will start in second, driver shifts to third with minor program change. GM/Chevy replaced my 4L80e, in my 2005 2500HD Crew Cab - due to the loud transmission whine in 1st and 2nd. It jerks into 2nd. 13 rear gears, 1st gear is pointless. TCC Locking? Is the transmission slipping in any gear? No 8b. Although it was first reported at 16K miles. Actually just passed emissions last week like this. The issue im having is that if its driven cold it shifts perfectly. +12V switched power is good. I ended up putting a rebuilt engine in it this spring. Shift it into 2ndeither manually or commandedand it frees up and works fine. 0l which is 4l80e equiped, I did a trans segment swap. Jun 19, 2007 · He is having an issue with the car starting out in 2nd gear sometimes. Sure need to figure this one out. Proprietary design features instant brake apply and release and the fastest 2-3 upshift ever available with the OEM casting. They said they May 14, 2014 · Trans can be manually shifted or commanded via efiLive into 1st gearbut it only bindsloading enginenothing else. Jun 18, 2002 · Vehicle is a 98 6. Next after I let off of the throttle the tranny was slipping. it WILL shift but only after you reach about 45-55mph. May 18, 2013 · if i start out cold in d or od it hold 1st ok till it shifts to second then it slips/flares and chatters bad. It's hard shifting from the first to the second gear. The tranny does not engage reverse until you tap the throttle. 2nd Rev. Apr 2, 2010 · 4l80e stuck in second gear even starting off. 48, Second: 1. thanks. I bought it this way, please don't ask why - I get enough grief from my wife. We tried the typical remedies like Internal Wire Harness and Shift Solenoids but the issue Aug 15, 2009 · :green:Thanks, Ted:driver: 1995 "S" Code K2500 4X4 Auto. interestingly enough he said that its the 2500 and 3500 vans that . 48; Second gear — 1. 0/4L80 swap?) No matter what I set the shift points at, RPM or MPH-wise, the transmission shifts into 2nd gear, as soon as the car is movingliterally within 10-20 feet This is my first Diesel and my first Chevy Truck. Mar 24, 2009 · I got my truck out of hibernation and up to the barn to work on it. Dropped pan todayno carnage foundsolenoids are clicking when shifts are commanded as The 4L80E I swapped into my '87 k5 started acting like the converter was going bad the other day. Dec 15, 2009 · I can manually shift it into all 4 gear selections but the transmission itself doesn't respond, it starts out in second gear and dose not shift, unless put into reverse. 5/4L80E combo. I have the basic Wizard setting on Terminator X Max. Maximum engine input torque for the 4L80 is 440 ft. Like it was slipping. Jul 22, 2008 · after some hard offroading my 4l80e tranny has decided to stop shifting into second gear. It means that there is something wrong in the transmission but it's not always that serious and fatal. 73 rear. My transmission only has First and Second Gear Only (no reverse, third or OD). Transfer case works well. Had it rebuilt at a local shop and had to bring it back two or three times for overheating issues. It ran and shifted May 9, 2017 · I have a 2006 2500hd with 6. Dec 21, 2024 · One of the most common transmissions found in trucks, SUVs, and high-performance cars is the 4l80e. Truck originally shifted fine but is now struck in safe mode-second gear. and then it reverberates back through the TROUBLESHOOTING THE 4L80E AUTOMATIC TRANSMISSION INTRODUCTION The Hydra-matic 4L80E is a 4-speed automatic transmission which uses electronic control for smooth shifting. This can be caused by a leaking shift solenoid or poor feed to the shift solenoid. Warped steels , causing a soft shift. Still needs some engine tuning but trying to get the trans working first. Once it warms up to normal running temps it stays stuck on 2nd gear. Pulling code 85 and 86 continuously (21 briefly but I moved the TPS and it went away-I know it needs to be adjusted). 1st gear holds fine, 2nd gear holds fine, all gears shift fine and feel good under normal cruising or part throttle, there are no DTCs, etc. Feb 7, 2008 · Ive got a 96 suburban, (labeled 2500, VIN says its a 1500) with a 6. Limp home in 2nd. 5L lines, G30 step van TCM, Factory ECM removed, Cooling System upgrade 97 water pump and steel Fan; Autometer Pyro, Boost, trans temp gauges; "Hot" Glow plugs on manual button; Hogged out Factory airbox; F Code intake Oct 25, 2007 · Put new tires on my truck and going home I decided to give it a little tune-up (blow some smoke out). Wont hold in 2nd gear. Arrived, plugged transmission back to PCM. 48, Third: 1. It feels to me like it's stuck in 2nd, but I'm not 100% sure. Plugged in from yesterday. Speedo is off by about 10mph (faster) than actual. Any suggestions on Apr 17, 2017 · My new to me 2004 2500hd 6. Transmission harness pins were verified against the Holley picture from 558-405. 07; The maximum output torque of the 4L80E transmission is 885 ft. In first gear when taking off i hear a whirring sound, sounds like an old electric motor spinning up May 7, 2023 · In drive first and second gear work fine but when it feels like it is attempting to shift into third gear it feels like neutral, the engine revs high but speed does not increase. 2. Oct 26, 2023 · The TCC regulator valve will start to feed drive oil to the PWM solenoid in advance of third gear 'lock up' for the converter, however if it the clutch is applying in 2nd, there may be issues in either the valve body or pump. It was the 4-speed electronically commanded evolution of the 3-speed Turbo-Hydramatic 400, first produced in October 1963. Approximately 15% of 4L80E transmissions experience significant issues by the time they reach 100,000 miles. 93 6. once warmed up sometimes it seems to be in second on start after a complete stop but feels like 1st usually. I've been told it's hard on parts to start the burnout in 1st and let it spin into 2nd and the easiest remedy to this would be to start the burnout in 2nd gear. As soon as it goes to shift to second, it skips right over it and goes into third. So far I have confirmed power to the switched +12V input, confirmed VSS and Turbine sensors are not reversed, and confirmed tire size and Rear Gear Ratio are correct. Here are the 4L80E ratios it features in each gear: First: 2. Once the driveshaft catches up to it , away it goes (hence the staying at 4600 rpm for . It seems to hesitate on the shift from 1st to 2nd gear an then slams into 2nd hard. 228,500 on the clock. First year of 2nd generation valve body assembly; front-to-back lube transfer pipe replaced with shorter, narrower transfer pipe from rear valve body/AFL to case rear bushing location. 75; Reverse — 2. Currently, the 4L80e is in limp mode with only 2nd gear and reverse. 0, 4L80e transmission, running a Silverado PCM (I guess for simplicity of the 6. Feels like its stuck in 2nd gear and the service brake check engine light constantly flashes i did the wiring modifications for the 4l80 and added the speed sensor in on the harness. when i was at one of the dealers i had the truck looked at i managed to have a convo with one of the trans guys who drove my truck to lunch that day and he said that the trans shifted perfect and although it was really loud, just go ahead and run it. Once in 2nd there is no slipping and the truck shifts perfectly fine to 3rd and 4th gear. and the maximum output torque is 885 ft. A torque con-verter clutch automatically engages at cruising speeds to improve fuel efficiency. 5-26 Drove today. 1st, 2nd, 3rd, 4th, Rev? limp mode 2nd gear only 8. Transmission is not shifting to 3rd or 4th gear. I have NO DTC codes stored, active or pending. You may have a damaged clutch pack in 2nd gear. D3 range will start in first and auto shift to third. 5-2005 (LLY) May 23, 2013 · Okay so I'm going to try to answer the 4L80E checklist: 1) 1995 k2500 4x4 positraction 4L80E Chevy pickup w/ 3. I am guessing this is an electrical problem. We fix the issue of going directly to 2nd gear which is limp mode. May 3, 2012 · yeah i also have a 97 c1500 pickup with the 4l60e and its quiet as a mouse. Username Post: 4L80E stuck in 2nd gear (Topic#244248); 383 Chevy K1500 Member Posts: 11 Loc: United States Reg: 03-05-05 Oct 13, 2013 · Sounds like it just makes power at that point and pushes up the stall speed to what appears like 4600 rpm. 160K miles NOS DB2831-4971 GM injection pump turned full up, Bobbie Martin's electric to mechanical IP swap. my fluid is clean, no burn smell i drove home from the desert and the tranny was shifting perfectly fine ( this was on a saturday). while the top engine input torque is 440 ft. Aug 23, 2007 · Jakeshoe, this 4L80E, did it have 2nd gear starts at a stop, then go into first when you first started to roll from a stop? Reason I ask is, I have one doing this, soon I'll need to get back to messing with it, the owner has had some computer issues he's been trying to clear up, so I haven't had the vehicle. Nov 21, 2017 · Car is a 2000 Trans Am, Turbocharged 6. Hutch I have a 2008 3500hd duramax that I want to try a little sled pulling with. When the tranny is not ticking, it tries to move forward in neutral and sometimes in neutral it seems to search Apr 14, 2013 · I went back out this weekend and now the transmission is skipping second gear. With the factory 5. Release time is tailored for pro-tree applications. It has a maximum input torque of 440 lb-ft and a maximum output torque of 885 lbs-ft with a vehicle weight rating of 800 lbs. Not sure its even had a transmission fluid and filter change. When the tranny is not ticking, it tries to move forward in neutral and sometimes in neutral it seems to search from first to reverse. It shows the correct gear in the scan tool from the PNDR sender but the gear the trans is in is 2nd. When you put the truck in second, it will The 4L80 features ratios in each gear as follows: First: 2. Describe symptoms: Does the transmission refuse to shift in first? Will it shift into second and just stay in second gear? 2nd only 8a. 48, third gear:1:0, fourth gear:0:75, and reverse gear:2. there can be problems in the 1-2 shift and 4th gear. One of the often overlooked areas for this leak is the O-ring on the #11 checkball capsule bushing. if i drive it manually its fine. Can someone give some pointers on what to change. The tranny gets pretty hot taking off. Unplugged transmission from PCM. Any problems with driver commanded/selected shifting into any gear? ie. 5, 4l80e, has lost first gear. 7 liter and 4L80E. Reverse is fine but when i put it in drive and take off it seems like the truck is so hard to move and im on the throttle more to get moving. In this article, we will discuss the possible causes of a hard shift from first to second gear in a 4l80e transmission and what you can do to fix it. 48; Second: 1. The 4L80E usually came behind the higher horsepower 2500 HD Silverado and Sierra twins. I got my car tuned for cam headers and a 4000 stall by the same person that tuned his car. But upon further diagnoses it is not the converter. 5 chevy turbo diesel engine. After it shifts through the gears a couple times its fine and takes off normal May 10, 2022 · I have a 1994 RV that has a 4L80E transmission and 6. I have replaced fluid and filter, solenoids, speed sensors, and pressure I made the wiring changes as outlined in one of the threads on the forum and have a custom OS that incooperates a 2002 Silverado 6. Gen 3, LS2 with 4l80e. If you put it in manual first the car clicks down into first. It did this, I was only able to go about 30mph until I came to a place I could pull over. It was not running at the time and had been sitting for at least a year as of October 2001. 5TD Got it in Dec 2007 - Replaced so far ( as of June 2016 ): PMD x2 - OPS x2 - Vac pump & solenoid valve - belt tensioner - harmonic balancer pulley x2 - AC compressor - U-Joints- All 4 interior Jul 4, 2014 · I just got my lq4/4l80e Geo Tracker swap on the road. Shifted normal about three test drives after, but not now. Still same problem. When you put the truck in first the truck goes great shifts through all the gears. The issue Im trying to solve is inconsistent 1>2 shift execution under WOT w/ gear selector in Drive (3rd). You might check for corroded connectors. 00; Fourth gear — 0. It has a light ticking noise from the front of the tranny. 00; Fourth: 075; Reverse 2. Speed sensors and solenoids have been replaced. 5-25 Leave camp. Just wanted to show how we fixed our shifting issues with a easily over looked issue. Fluid is in good shape, connections are together. I also have the same issue as him where sometimes the car starts out in 2nd gear. Drive temperature 5-23 Found small amount of oil in connection Contact cleaner. Apr 7, 2006 · Hello, This is my first Diesel and my first Chevy Truck. 75, Reverse: 2. Jul 27, 2024 · 2nd: 1997-1998: First year of rear-gear train lube redesign (aka 'center-lube'); return cooler line fitting relocated to center support to lube gear train directly. The 4L80E automatic transmission uses 4 forward gears and one overdrive gear. - At 35,500 miles. I have 2nd gear and reverse neutral and park . It offers a fourth gear overdrive to increase fuel efficiency. 48; Third gear — 1. . But if i put the shift lever in 1st it stays until i up shift to the next gear so on & so on. Manually shifting into first or second works fine as well but manually shifting into third results in the same neutral feel with free revving engine and no forward power. GM manuals suggest input speed sensor faults. Carfax shows a decent amount of service, including trans fluid service ~30k miles ago. Dec 17, 2011 · 10. nbul pnhnon stanpu sykhc vzrsfm esqbcz gupfek pihev qyotmqn ilxhh