My '94, 4x4 with the 4.0L engine (109K miles) has been in the shop having its transmission rebuilt. It has been there 3 days past the expected completiion date. So I just called for a status. They were a little abrupt but they say the trans is done but now it runs bad. I said something like " Hmm, that's odd. It was OK before." They said: "We're are working on it and will call you when it's done". I got the impression that they were frustrated and preferred not to discuss it right now. Unfortunately, i have no other details. I can only say that it started up fine, idled smoothly, would rev OK, etc. It was OK in Reverse too (auto trans) but trying to go forward was a jerking, sputtering mess! Hence the trans rebuild is needed they said.

So I am writing to ask whether anyone might have an idea as to what might be happening here. Seems to me that a tranny rebuild should NOT have any affect on the engine's performance unless there is some damn sensor or whatnot that they damaged and/or neglected to re-connect or whatever.

Thanks