Quote Originally Posted by BigRabbitMan View Post
Right now the biggest unknown is the transmission issues I have discussed above.
1. Will a Duramax ECM function as well with a non-GM TCM as it does with a GM TCM?

If you can give any help or direct me to a source of information on these two questions, I would greatly appreciate it.
Question #2 was answered elsewhere and the answere was NO.

That leaves Question #1. The reason for this question is that I am considering going with an Allison 2550 due to my driveline parking brake requirement. I would like to have it with the wide grear ratio if I can get it flashed as a 6 spd by Allison. If that can be done, then the question above is very pertinate as it is pointless if the LBZ will only function properly with a GM TCM.

My thoughts are that the LBZ functions with a manual transmission, it should be fine, but I can't find out what inputs other than output shaft speed, if any, are needed by the ECM.

Thaniks,

Thanks,