I recently got my 48 GMC on the road. I had trouble with adjusting the TV cable so I bought a TV kit from Bow Tie overdrives to try to get it right.
When accelerating about 1/2 throttle I heard 2 loud bangs comming from the transmission. This was probably at or around the 3-4 shift.
It drove home (5 miles) okay at light throttle after this.
Any experts Have any ideas what happened. I know I need to drop the trans pan & see whats there, but I just had a heart operation & am not feeling well enough to do it.
Don