48re not shifting

[winkdemon]

have a 2006 3500 4x4 , was working great , stopped for fuel and now it won't shift from 1st gen inless you have the pedal at 100% , no codes , its a new trany , have tried new shift solenoids , transducer, made no difference

any ideas whats going on ? :bang

 

[YoungDiesel27]

I always put a new govoner in while I am replacing the solenoids and transducer. Could be throttle valve, govoner, or even output speed sensor.

if you have access to a scanner that shows gov pressure, and output speed you should be able to narrow it down.

 

[FlyinHayn]

:agree:
Governor

 

[Schrowang]

Do you still have 2nd gear?

 

[winkdemon]

has new gov in it , on scan tool eveything is good , the trany is not being told to shift by the ecm , unless you are at 100% throttle, i have replaced everything i can in the trany with new , new trany harness ,

 

[randal07]

Sounds stupid but ive ran into this before, check tranny fluid level.

 

[winkdemon]

fluid is full , had the pad off and re full six times ,

 

[winkdemon]

ended up to be a bad pin in the ecm conector , but its fixed now , thanks for the help guys

 

[autoferret]

i was going to ask band adjustment... mine wouldn't shift from 1-2 ether