Anyone with a Cummins 5.9 commonrail and Allison 1000

DSDP Don wrote:
I doubt you'll get through by phone to Allison, but how about shooting them an email. Ask them to outline the procedure, if it can be done, and then take those notes to a shop that can access the trans computer and follow the steps.

It is possible but from what I understand there are driveline analysis as well as other considerations to be addressed before they would change the calibration. I am currently working that side as we speak, but there are no guarantees from what I've been told.