Tranny won't up shift?!
 

I installed a Predator/Puck Stacker kit in my 05 Cummins Ram this and it awsume but when I gun it at 70mph it will down shift and runs up on the rev. limiter and won't up shift until I let off of it.

Any ideas?

Thanks.

RE: Tranny won't up shift?!
 

dont stack.... hard on truck.... i would try tuning it down a little...