I own a 1992 F250 with a 460 and E4OD Trans . It has been a great truck but now im having some issues .

When cold, Truck shifts perfectly in all gears, torque converter locks up in overdrive, no problems at all until about 20mins of driving. Late shift 1-2 gear and no shift to overdrive. No slippling when accelerating from stopped . pulled the codes and recieved only code 62.

If I let the truck cool down for an hour it will go back to shifting perfectly without erasing the 62 code .

My question is this: Could the torque converter mechanically start to slip ONLY when transmission fluid is hot? What could be some other probabilities here?

I have learned so much from this forum and I am happy to be a part of it ..thank you in advance to everyones help .

 

You'll have better luck in this forum:

https://www.ford-trucks.com/forums/forum28/

 

Moved to correct forum.

 

Thank you for correcting that.

 

Not only is that possible, it's likely. When hot the fluid thins and any internal pressure leak gets worse. These torque converters were known for cracking the torque converter clutch apply piston. Apply pressure leaks through this crack, reducing the apply force. When the fluid is cold there will be less leakage.

One way to check this is to look at the front face of the torque converter. You can see it if you remove the cover on the front, bottom of the trans. If the front face is discolored, especially if it is blued, you have confirmed the torque converter is slipping and needs to be replaced.

 

The TC is completely blue .Probably a replacement . Your explanation makes sense why it would do that only when hot .

My concern is that it could be the pump in the trans or some other component ..would there be any other things to check before replacing the tc ?

 

The other things to replace, not check, are the torque converter hub seal, bushing, and the pump o-ring. You need to remove the pump to change the bushing, so that requires a new o-ring. And there is a much improved seal available from the aftermarket. It's made from a material called Viton.