I have a 94 Cadillac Seville STS and had to replace the motor and the tranny. Replacement came from an Eldorado....I replaced all the sensors in the tranny.... and the trans shifts through all the gears....the problem is that the trans will not engage from a stop in 3rd or Drive..... so if I start in 1st or 2nd and shift at any point it will shift up automatically.
Cadillac dealer tells me its a tranny problem and not a computer problem. I'm not sure what to check next.
Thank you.