truck came in with 1-2 bang at all throttle settings and a whining noise from trans.
none
Problem
after rebuild, when warm, at light to med throttle get a bump on the 1-2 shift. happens 90% of the time. i am having a hard time getting any information on this vehicle. any help would greatly be appreciated.
Update
had the computer updated and the problem is still there. it is a lot more noticable when going up grade.