My son just bought a 92 F150 that needed a new transmission. I figured it was the perfect vehicle for his first truck. He could learn about mechanics and how to take care of his truck right off the bat. So we found a 96 e4od with only 10,000 miles on it and installed it over the last month or so. When we fired it up everything seemed to work just fine. Maybe it killed the engine unexpectedly when just starting out of the barn, but on the whole it seemed to be a successful operation. We drove up into the mountains for 5 miles or so tonight and the transmission started slipping. Turned right around and came home but the transmission was pretty hot. Still full of fluid and i hope it's not damaged, but what could have caused this? Is there an issue between computer controls between 96 and 92 to where i need to find a new control unit? Or is it more likely the transmission cooler that has a problem.

Waiting for it to cool down now and sure hope it's not fried..........

Thanks for the help,

Mike

 

The wiring diagram for the 92 tru 96 is the same so shouldn't be any issue there but how did it shift?

What is the condition of the cooling fan clutch, does it lock up when it should, and what does it have for a trans cooler on it? Its not running on the cooler built into the radiator only is it? If so that is never going to be enough to do the job.

 

It has a separate transmission cooler right behind the radiator. Also, the person we bought this truck from said he lost his transmission because of the front seal leaking all the fluid out, but i wonder if this problem is really what happened to him as well. I hooked the 2 lines up to the drivers side of the transmission. One was longer than the other so i hooked the longest one up to the rear port on the transmission and the shorter one into the forward port. They were not exactly the right length so we had to do a little bending up forward, but that should not have been a problem. I saw somewhere that there is a thermostatically controlled valve in the cooler lines to facilitate warming up the trans in cold weather. Could this be a problem. Where did the install this valve?

If the transmission got hot is it toast for sure? The fluid is still red and full.

Thanks for your reply,

Mike

 

My bad. I hooked the trans cooling lines up to the passengers side of the trans.

However, we have let the transmission cool down and drove the truck again and the transmission feels normal, but started getting warm again just driving down our driveway to the mailbox and back, about 800ft round trip. So we have shut it down again and will talk to a transmission specialist tomorrow. It must be the cooling lines are plugged off completely or they are hooked up backwards.

Does anyone know if the front port on the transmission is the out line or the return line?

Thanks in advance,

mike

 

It should be ok as long as fluid is still red and at the appropriate levels did you look over the lines and check for any kinks and maybe try ubhooking them from the transmission and put a water bottle or something like that over the outlet and blow through the inlet with a compressor could be clogged up with metal shavings and what not from the old tranny

 

Hah just realized this was a really old post apologies