[Bass-Assasin-Cummins]

My transmission cant make up its mind between 1st and 2nd keeps going back and forth around 21 to 26 MPH the RPM stays the same, I am still under factory warranty, so far dealer does not know what is going on

 

[rthrbelsewhere]

Assuming you have the 48RE auto....here's your TSB

TSB 21-009-07

Tell the dealer to start paying attention....:rof

 

[Bass-Assasin-Cummins]

Thanks lot man

 

[rthrbelsewhere]

U got it buddy! :thumbsup

Wish mine was still under warranty, i've got the same problem, but i'm gonna have to pay to have it done when i get the trani flushed...soon.