Hello. Just had the transmission rebuilt. 90 Ford Mustang 4 Cyl engine. Automatic transmission. Had a complete rebuild job done on the transmission. Got it back, now wont go into second gear or higher. Took it back and they reopened it up and checked and said all was fine. Now once again, wont go into second. Goes to about 25-30 mph and rpms are jumping up around three. So I called again and now they said it could be the engine.
Can anyone shed some light on this. Thank you.