Originally Posted by whporwil
Is the allison 2500 ok with this?
I initially had hesitation concerning the 2500. So before I had Cummins uprate my engine I talked to them (Cummins) about the transmission. They did not feel it would be a problem at all. They said that the momentary power cutback while shifting still takes place to protect the transmission during full throttle shifts. Full engine torque is available at the same time as before, just more of it!
I also mentioned it to my Allison service facility when I had my transmission reprogrammed a few weeks after my engine uprate. They also felt it was a non-issue and that the 2500 was robust enough to not be any issue. Especially in RV service instead of stop and go heavy haul service.
But I will monitor the transmission fluid carefully, I am looking into annual oil analysis to stay on top of any problems.