Hummer h2 wont shift into gears,replaced the tranny with another one from another h2 which was working well,but still wont shift,what could the problem be
Replaced my gearbox after shifting problems,but the same problems persists it wont shift into gears .Hummer h2 automatic
Cars & Trucks - Hummer - H2 - 2005 Hummer H2
Answers & Comments
When you scan the transmission control module do you get any fault codes showing up?
The tranny that did not shift and had the P0751 code is shifting normally in my other hummer.The one that was shifting and was swopped is now no longer shifting.You are correct I can feel it is locked into 2nd and 3rd gear?
I think (my opinion) your Hummer has an issue in the electrical harness to the transmission, most likely in the connector, swap the harness out from the other hummer you mentioned. If that cures the issue find a new or used harness for the tranny.