Allison 6sp: allison trans help

allimax

New member
Jun 26, 2010
7
0
0
can any body help?? i drive to the store,on level ground and put in park and shut the engine off. come back out and start the engine and a loud noise in the tranmisson, kinded like when you put it in park the trans locks and wont roll, it fell like when i shut the truck down it get sometime stuck in the middle and it go bang,hope that make since.should i take it in to the stillership or could i fix it,all fluids are full,i dont know what to do,thanks for any help.
 

MACKIN

Smell My Finger...
Aug 14, 2006
3,948
1
0
Connecticut
There isn't much detail on what you have without digging. What year truck any modifications? If none and your under warranty the dealership should be your place to have it diagnosed.
 

Sagebrush Assassin

New member
Jan 28, 2010
12
0
0
Odessa, TX
it sounds like the parking pawl..or did it just do it right when you started the truck..If you where while trying to go from park to another gear then that is what it probably is but if not then you may have problems..