hey anyone know why my 04 cummins with the auto hags in 1st gear and wount shift till 3500rpm or i let off the gas? any ideas its really anoying

 

tow haul mode??? im not sure, just throwing ideas! HELP THE KID OUT!

 

Mine did the same....it was the gov. pressure solenoid

 

my new 06 was shifting weird and throwing a code they put a new flash in and reset cel shifts better wife says

 

yha i think im gona get the new valve body from suncoast A618 with computer it comes with the gov update kit and more plus i can use paddles to shift and it will hold gears untill i shift its cool check it out its under suncoast racing parts

 

my 06 was doing this too, i adjusted the bands and it helped sooo much. I ended up rebuilding it with DTT pieces and parts.