Hi, ignore my mispelling of my username haha

I have a 2001 f150 5.4 4x4 with the 4R70W trans. its leaking fluid from somewhere. its not the pan gasket or the seal. it seems to be coming from the top somewhere. the dipstick tube has new o-rings. and the cooler lines have been replaced and are not leaking either. i have no idea where else it could be coming from. the passenger side of the bell housing is wet with fluid. any help is appreciated

 

might be the seal behind the torque converter...only leaks out when running? Or the Torque converter itself is leaking , Or....check the tranny lines and see if there is a little pin hole in it and just spraying up on the block

 

Do those have a vent on top?

 

It's a continuous leak. Theres a spot where i park it. All of the cooler lines have been replaced since its got 230,000 miles. The engine block doesn't have and fluid on it just the trans. and yes it has a vent tube on top.

 

Are you sure it's transition fluid by the color?
Is the fluid level going down enough to need fluid added?
I have a reason for asking because there is no fluid that high up.
Good luck.

 

Yeah its trans fluid the fluid level gets lot and I've been adding lucas oil stop slip in it.

 

This seems to be where its coming from. Its onthe back of the transmission above the exhaust crossover mount. Idk what it could be. A sensor or solenoid?

 

I do some mild offroading frequemtly with this truck since it's not my daily. But I do use it often.

 

If your to the point of using additive, it's time for a rebuild.
The transfer case is separate from the transmission with it's own fluid.
If the seal leaks between the trans case and the rear 4wd case, the rear goes over full and can begin to leak.
Good luck.

 

Maybe a rebuild?

 

Looks like to me you have an issue with the gasket between the back of the transmission and the tailhousing. It may be bad. If so you have to remove the transfer case and then the tailhousing to replace it. Not fun in the backyard but doing. A transmission shop would think nothing of replacing it and good guy with what he needed at hand could swap it in about an hour, maybe two.
But before you get too excited over all that, how about trying to clean some of the mud and crap off those extension housing bolts? Then see if some are loose and just need to be tightened up.

 

easy? nooo.... you cant take the TC out without taking the exhaust out..