Just put a rear end in on my 99 k1500 suburban ls and now my Trans wont start off in drive or 3 but will start off in 1&2 but if I get on it it will slip... It does shift through all gears of I start it in 1 or 2 but will not go from stop in drive or 3...4x4 does still work but does the same thing plzz help me thanks



99 Chevy suburban ls k1500 4x4 5.7