Replaced a couple of worn out servos in my friends explorer. Followed the procedure and everything went well. Took it on a test drive and couldnt get reverse to work and drive was severely deficient in power. Tried again a few minutes later and it was stuck in driveand couldnt get into park. Now the truck will not even start assumingly because the tranny is still in gear even though the gear selector is in park. Any ideas or is it time for a tranny rebuild?