2003 Chevy Silverado 4x4 changed transmission because wouldn't move in drive or reverse switched it out wit 1999 Chevy suburban transmission still won't mive
did you replace the trans with a rebuilt or used with a warranty? Or did you get a transmission out of a vehicle that you knew shifted normally before you tool it out? Trans and torque converter?
how do you know if your transmission is a good one or not?