I have a 1992 E-350 with 5.8L engine and the 4 spd (OD) XMSN. It is
doing 2 things I don't like:
1) minor... when cruising on the Hwy in OD with lock-up, when I slowly
push the gas (say on a hill), the unit un-locks and shifts into 3rd at
the same time. Other cars I have just un-lock, unless I contintue
pushing the gas harder, then they downshif. What is normal for this car?
2) MAJOR... When hot, the XMSN will start shifting REALLY HARD 1-2 and
2-3. If I am going along 45-60, and pull the lever to 1, and go to a
complete stop, put it back into D, that will fix it until I turn the
engine off. A XMSN guy looked at the code and said it was "60" and that
means a slipping torque converter, which the control module senses, then
jacks up the line pressure to compensate. He plans to put on a new
converter, and possibly re-build the XMSN. Is this a reasonable diagnosis?