1998 suburban with a 5.7 having trouble shifting up, it just revs up but never shifts, backfires occurring often when revving up too. If anyone knows what could be the most likely cause I'd really appreciate the help.
I have a 2008 Chevy Suburban 1500, 5.3L LT (no air ride). I decided to put a lift on my truck, and here is my setup.
RC 3.5" Lift
3.5" shock spacers
Transaxle bracket mounts(came with kit)
KYB stock coilovers
MOOG Upper CA's w/offset ball joint
Skyjacker 4" Lift knuckles