4l80e limp mode problem

[ph4ze]

It has been along time since I did anything inside a 4l80e but seem to remember the shift solenoids in the early ones and later (94-95) had different resistance solenoids. So the $31 and $OE might not be grounding them properly. You can manually test them by grounding. I think nothing grounded will give you second gear, 1-2 grounded will give you first, 2-3 grounded will give you third. It goes without saying but will say, don’t ground them both at the same time.

The engine and tranny came out of my 94 suburban which ran and drove fine right before i pulled them. No problems at all. Trans was rebuilt by previous owner before me( receipt confirmed). I did manually ground them snd heard clicking. 1-2 only grounded will give you first but i did that and it was still stuck in 2nd. Bith off will give you second gear. Mainly its only 2-3 solenoid. I havent got a code for 1-2 in the past 2 days. I even tried loading my original $31 BIN that i had in the 94 before i pulled it and same problem.