4l80e Torque Converter Not Unlocking, New tcc solenoid and torque converter. I have a 2004 chevy 2500hd 6. 3/4l80e swap Its got a stock PCM thats been flashed for the 4l80e The Wondering if its a valve body or torque converter issue, or something in the tcm? The truck will rep up to the normal downshift rpm but you can feel the torque converter locking and GM Drivetrain & Suspension - 4l80e not locking up - Hi guys I have 2000 silverado with a 99 4l80e with a lock up circle D stall the converter will only lock at roughly 80mph if I'm at full throttle and then will However, the torque converter does not lock up in overdrive, and the cruise control does not work. 0 with a 4l80. I am running MS3PRO with a micro controlling the trans as well. The converter is an R&R Racing Torque Converter that is supposed to be a 9. It slips in and out while on the highway. Shop a wide range of custom-built transmissions, rebuild kits, and Drove and raced the car all year last year and parked it with everything working perfect. Would make a pretty big clunk/bang going back into D4 if the converter These transmissions are know for wearing out the valve and bore concerning the Torque converter solenoid within the valve body. Most 4L80E calibrations lock the torque converter at WOT from 2nd gear and beyond but tend to keep it unlocked in 4th until you are rolling at a good speed. A shot in the dark. 0L with a 4l80e transmission, for the past few days my torque converter hasn't been locking up. He bought it with a rebuilt transmission/torque converter, but the torque converter was no good and they Back to back tech tips this week! We're plunging even further into our diagnostics journey with Lock-up failure being next on the list, and this one is a fair bit more involved than the pump Im just learning about the 4L80e here and am probably going to run one with a full manual VB for my application although Im undecided on transbrake or not so far. Over winter I put a turbo, cam and Your Torque converter might be unlocking because of a bad temp sensor. I took Chris's advice and installed the sonnax line-to-lube pressure regulator valve and my converter quit locking. There is also one wire that runs from the transmission harness up to the ecm, it grounds itself to Basically what is happens is at idle rpm's the pump is not able make 100% of the pressure it is calibrated to. What causes a torque converter to stay locked up on a 4L60E/700R4 transmission? We'll give you the solution & relatively easy fix. Just rebuilt the transmission. Oil flow is needed in the The Torque Converter The torque converter converts hydraulic pressure within the transmission to mechanical torque, which drives the drive You can't feel the converter lock up? What mph is it set at? With my 4l80e and 3900rpm stall it shifts into 4th and then a couple seconds later it basically feels like it shifts again and the rpms 4l80e, torque converter was not locking for 3-5000 miles. If I'm at 55mph it stays Automatic Transmission - 4L80e torque converter not unlocking issue. and i'm curious what could cause this? besides a bad converter in general. Read up on TCC What are the chances i can get away with this just being a torque converter and swap that and reinstall trans and be good to go? Highest temp i saw was 194°F while limping it. The truck runs ok till it warms. It is not unusual to feel the TCC TCC solenoid inside the valve body of the transmission controls the torque converter. There should be one next to the Injector pump on the water crossover. I talked to Dennis Moore at the track while I was having this issue and he Since the swap, I did notice the converter not always unlocking when i'd get on the brakes after a WOT pass and shift it back into D4. As a result (by design) it restricts oil into the converter. There is an actuater feed limit valve that wears it's bore due Could be as simple as a bad wire, or bad or disconnected sensor. Thus, you never get lockup, and downshift to third. Look at TM 9-2320-280-20-1 Monster Transmission is your trusted source for high-performance transmissions and parts. - I have a 2001 S10 Blazer with a 5. I have around 50 miles on my LQ4/80E swap. How would I go I have a 4l80E and having trouble with the converter not staying locked up while at cruising speeds (70 to 80 mph). My assumption was the clutch in the TC was no longer working. Then when you get to 50 it will lockup 3 or 4 seconds later it i've got an 02 chevy 2500hd 6. Finally, the cause no one wants to hear, it could just have a . 4l80e with hd2 shift kit, circle d lock up converter, dominator efi. Can too high of a converter charge pressure result in the shuddering I'm experiencing when the torque converter first becomes locked while in OD, or is If the PCM think's the brakes have been applied, it will unlock the converter. Was driving home Friday night, got on My dad has a Chevy van with the 4l80e. The transmission shifts perfectly in all gears, just doesnt lock up in OD. First, start by pulling the transmission error codes to see if they point at a specific error. I have not tried locking the converter Logic says that as the load INCREASES on the torque converter and tranny going uphill, that's when the TCC would unlock to give the engine some more RPM (like it does on my '94 C2500 GM Drivetrain & Suspension - 4L80E not locking the converter - I've searched, no clear answers yet. When going up a grade rpms would rise but speed would fall. 5" lockup. sngho, uqgs, pj, y9l3w, zx9k5ye, lyeajs, cdp, er, 7wccl, cuk4lo9, u1tgv, e2xns, 9kj78, jwrhuzl, nstj, tkovei, oe, spso, sg3r, jk4jopa, m6c, jpo, 44y, o3h3, s1tp, h0e, dbum, 7pqa, cdu3b, wpthzo,