I changed the transmission fluid and internal external filters in my Allision transmission I used Dextron lll fluid. When I ran it down the road after the oil change it had a loud whine in the transmission that was not there before. I took the truck to Chevy dealer they changed the oil and filters with the same result, a whine. Chevy dealer said drive it untill it breaks. BAD Idea.
Any suggestion on what went wrong?
Any suggestion on what went wrong?
