4l80e no 4th or possible tcc apply?
4l80e no 4th or possible tcc apply? Just got this thing on the road and I know its not acting right I'm just not sure how to pin point what it could be but looking for ideas on what to test in order to get a better idea of what's going on before I pull it...I know reverse works so I think its going into all gears up to 3rd...I know the 1-2 shift solenoid works because my Jakes trans brake is working. At light throttle <50% and 50ish mph it seems to flash all the way up to the 3200 stall speed before it starts to accelerate...this is my first non stock converter so I don't know if its supposed to do that or if its just really loose. I was the one that built this transmission and air checked all parts like Jake suggests so I don't think its a seal issue though but this is my first build.
I'm not sure what else to give for info but I will try to get it if you let me know...I just don't want to drive it more than I have to.
I'm not sure what else to give for info but I will try to get it if you let me know...I just don't want to drive it more than I have to.
What are you using to control it?
Diagnosing an auto trans, especially an electronic one requires ALL the pertinent data. The control scheme is of greater importance to answer your question than the transmission itself.
Diagnosing an auto trans, especially an electronic one requires ALL the pertinent data. The control scheme is of greater importance to answer your question than the transmission itself.
Ok so I fixed the misfire table but still doesn't lock up. I can't even get it to manually lock up with the on/off switch in hptuners. I pulled the pan and checked the solenoid and it does work when commanded by hptuners with the key on engine off. So what else should I test?
I also logged the input and output shaft rpms and it does seem to be going into 4th
I also logged the input and output shaft rpms and it does seem to be going into 4th
Trending Topics
Revisiting this...i was wrong about the stuck valve fixing it. Its still doing the same thing on the highway at 50mph it requires the motor to rev up to 3k to start accelerating on flat ground. About to pull this transmission back out
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo I didn't connect your screen name to your real name.
Phones have been doing strange stuff this week with some of the extensions not ringing so it always makes me wonder what calls I may not be getting.
You can PM or email as well.
What I thought was no 4th was actually a stuck 2-3 shift valve in the transbrake...Jake told be how to fix the issue so hopefully that was all it is and the transmission works properly after I get it installed back in the truck
