problems w/duramax allison tranny

#1
dear allison man,last night while driving home i hit some railroad tracks and the tranny jumped out of gear,i let up on the throttle and it went back to normal.it did the same thing again and again.i parked the truck and the next time out i felt the tranny slipping again i stopped and started again andthe truck went fine untill i hit another bump and it jumped out of gear.My mechanic says he got a ton of trouble codes and is working through them,but they will not clear.Do you know whats going on and if so can you point me in the right direction.the truck is a 2002 duramax disel with 75000 miles on it. help help help help

i need your help

firex9
 
Top