I have a 1990 F250 with a 7.5 liter and an E4OD.
It starting acting up a couple months ago. Tranny would seemingly go into neutral while on freeway. I figured trans was going out... after reading several threads ive decided to try changing the mlps first, got a new one at the dealer $103!!!. It is the updated one with the connector on the top. I'm currently waiting on a new pigtail from autozone(the original is in bad shape, wires frayed, insulation missing. Also I think when it started having issues we were having some serious rains, which may have caused this connect to get wet.

I believe a previous owner may have had the trans rebuilt at some point. The connect has 6 wires going in it and when I trace those wires back, two are spliced into one farther up the harness a bit. Looks like one is tied into a wire that goes to the solenoid harness. I'm hoping I can cut and splice the 6 wires into the new pigtail and be good.

Ok, sorry for long intro, may need further help with mlps harness connector later.

For now, while I was under there I decided to pull the solenoid plug as instructed to make access to mlps plug easier... what a pita... the lock is on the backside almost impossible to get to, I messed the plug up all the way around, but not fubarred. When I pulled the plug out, it was soaked in transmission fluid...
Is that normal?

 

No it is not normal. If the solenoid is internally leaking it should be replaced.

 

Thank you, will replace solenoid pack