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Hi Guys i have a Jeep JK with a GEN IV 5.3 with a 6L80e and when starting the Jeep the selector is in Park but the dash PRNDL says its in Reverse.
Select Reverse and sometimes doesnt engage also...

Ok got it started and moving. No reverse but reverse lights come on also on the dash.

Have turned Vats off in the new tune

Hi Guys i bought a brand new 6l80e for my LT83 5.3
The transmission had a blank TCM so GM flashed it with the stock program
but in doing this had to also flash an update into my ECU.

After he...

Thanks for the response

Hi guys. I have just bought a new transmission.
Do the TCM is blank no programming. Can I use my files I already have and just upload it to the new tcm via HP

Thanks for sharing that but it didnt work. still wont shift down to first gear using tap shift..

Hi guys and girls, can someone point me in the right direction in finding the Tap shift tables as i would like to be able to select 1st gear when i want to, as i almost have to come to a stop for it...