4l60e troubles

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

phantom 309

OBS Enthusiast
Joined
Jan 17, 2018
Messages
57
Reaction score
36
Location
?
Now my daughters truck has a new problem i,ve been trying to fix,.
It started with the P0785 code, so i changed both solenoids, cleared code , ran fine for 2 mins till it got a little warm then cel and limp mode same code.
I then changed the pressure manifold, cleared code, again drove great 1-2-3-4 lockup for 2 mins then code is back.
I can tell its heat related, because sit over night and it'll drive fine for 2 mins. If i clear code and let it idle for 5 mins or more it codes again, when its warm i cannot clear the code.
Has anybody else experienced this? 4l60e's are bloody nuisance.

Thanks for any help Truck is 1997 305 4l60e
 

Artinaudio

Newbie
Joined
Oct 9, 2021
Messages
20
Reaction score
15
Location
Florida, u.s.a
Pass lock system would be my guess., I only say this cause experienced it on a buddy of mine truck, searched everything changed all sorts of stuff, he thought it was trans related but a licensed flash solved issue, now he has spare trans, computer, sensors ect.
 

stutaeng

I'm Awesome
Joined
Aug 7, 2019
Messages
3,410
Reaction score
4,348
Location
Dallas, TX
Check wiring and fuses. Check the transmission wiring harness. Unplug the main round connector and confirm there's no fluid inside.

Make sure shift solenoid resistance checks out.
 
Top