4l80e limp mode problem

[myburb]

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.

[brian617]

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.

Only the force motor (PCS) changed from 93 to 94-up

[lionelhutz]

Both shift solenoids grounded will put the transmission into 4th gear.

[myburb]

Both shift solenoids grounded will put the transmission into 4th gear.

Thanks for straightening that. As I typed was thinking of the old manual switching of both on for overdrive and then posted what I did. Must be age.