2016 Gmc Acadia ''Speed Limited To --- Mph "" Message No Rev When In Gear
Vehicle had transmission replaced due to shudder of torque converter
used low millage transmission was installed
vehicle starts normal has communication with all modules
there is no codes in any module
in park and neutral u can rev ungine normal
in drive and reverse vehicle spins wheels only at idle speed
there is no responce from accelerator pedal
message is displeyed everytime u put in gear
“speed limited to — mph"
done this job many times never had issiues
any ideas tranmsission data pids look ok as well as imputs
seems to me like software issiue maybe reprogram ??
I never had to reprogram those before im lost
Need to swap the original TCM/TECHM from the original transmission or install and program a new TCM/TECHM from the dealer ONLY.
Gm ?? Never knew that I did 2017 traverse month ago had no issiue
GM has not been swapping modules for almost a decade. Many documents on this site about not using used “Global A” modules. Every once in a while you get lucky. But I would start with I posted above before going any further.
Caleb, That is good advice. Here is what I know about the USED TCM situations on GM. I have programmed many of these used. As long as there is 1 calibration number that is different it will write the VIN into the used TCM when it programs it. If the VIN is not changed. I get calls that there is a shudder upon launch or that the cruise control doesn't work. It is always something weird. I have…
Just did a programming on a 16 Acadia last week. They called me for a diag because of the same symptoms. I found it funny because there were no codes in any module. Programming the Tehcm cured the symptoms. Unfortunately the new (used that is) trans had issues as well. Seems like they are having valve body issues on these newer 6T75's good luck
Thank you so can i just reflash this tcm or i need to swap back to old transmission tcm
We are trying to help you Pawel. If I was you I would just swap the original back in. No guarantees the programming change the VIN in the “new” one.
Pawel, Do what Caleb said, either transfer the module from the original transmission to the replacement used transmission or install and program a brand new (not used) module purchased from the OEM dealer. Eric
I programmed the one that was in the used transmission as a diagnostic step. However the shop knows that if the TCM goes south or doesn't work it's not my issue. Caleb and Eric gave you the correct way to do it.
The 6T70-75's are garbage piles and have been ever since they came out in 07 I think. They have problems with everything, TECHM, Valve Body, Hard parts, TC, lol the list goes on and on.
100% i did over 60 swaps here since like 2012 Mostly shudder and slips I never had this issue Thanks everybody for help i will keep you posted monday
I did program used trans tcm without swapping old valve body with gm sps It worked vehicle is fixed Thank you everybody Merry Christmas
You got lucky that it took the programming. Global A is always a crap-shoot when trying used modules. Used car-lots do it all the time. The success on reprogramming used is about 30%.