I'm totally confused, hopefully someone out there can help. First the particulars on the truck. Its 1992 F350 crew cab (i.e. four doors) long bed w/ 7.3L diesel and E4OD transmission. Now the story.

The transmission on my minivan went out so I rented a tow dolly and hooked the rig to the truck. About 20 miles from home the transmission on the truck went 'squirrelly' and finally gave out. I had the truck and the van towed to the transmission shop where they dropped the pan on the truck and couldn't find anything wrong. At which point I should have called another tow truck to take everything to different shop but that's another story. I couldn't afford to have both transmissions rebuilt and the van was the more important so I had the truck towed home where it sat for quite a while with the back drive shaft in the back floorboard and me starting it every so often.

Just last week I put it into gear just to see what would happen. MUCH to my surprise the front drive shaft was turning. Today I put the rear drive shaft back on and now the truck will move ( I drove it forward and backward down the drive). Which is why I'm totally confused. If the transmission was shot why does it work now? If the transmission wasn't shot why didn't it start working while it was in the shop? Could it be that the transmission is just on its last legs and will die again or could it be a electrical problem? Or could it be something else that has plagued the E4OD transmission that I haven't heard of.

 

MLP sensor is a possiblity (MLPS). Figure out where it is and clean it with wd40. You need to get the codes pulled for the thing though. It could have been low fluid level whacking it out as well. The VSS on the diff may be need to be cleaned. Just some things to check. Good luck.