Cat C7 with Allison trans - 2005 Thomas Saf-T-Liner
We have a 2005 Thomas Saf-T-Liner HDX
As a school bus, it has 6th gear locked out
The Bus dealer we bought it from said a Cat dealer should be able to reprogram it to unlock 6th gear.
After a few calls, it doesn’t appear they’re all too excited about doing it and even want a lot of money just to run the numbers so see if they can get permission.
Our question - anyone have any luck using a TCM for a 6-speed out of a truck? If we swap out the TCM for the transmission then we shouldn’t need the reprogramming. Is that correct? Any thoughts or experiences?