Hi folks. I’m leaking a yellowish fluid under my 92 F150 5.8 that for the life of me I can’t figure out. All my fluid levels appear normal however the bottom of transmission appears soaked and is dripping down on to my driveway. I replaced the pan gasket last November but the fluid that’s leaking isn’t pink or red. Could it be my main seal? I’m not that mechanically inclined, so I’m hoping to get some guidance as to where to look, as I haven’t been able to locate the leak. Here’s a picture of the bottom of the transmission for reference. Thanks in advance!

 

That looks to be the bottom of the transmission's bell housing that is all wet.
There should be a small plate on the front side to the motor to get to the converter bolts.
Remove that plate and see if it is wet inside there and dripping out the bottom.

The other thing you will want to do is de-grease the back top side of the motor and that area that is wet under there so you can keep an eye on where it maybe coming from. I say the top back side of motor as the rear intake seal could be leaking and running down the rear of the motor / bell housing.
A valve cover could also be the cause doing the same thing.

Have you checked the ATF level and color lately? If it is burnt it can look yellow.
Any leaks near the power steering parts? PS fluid can also look yellow.

Thing is to clean everything. Before you go driving it at idle look if you see anything leaking. If not bring the RPM up to say 2500 and check for the leak.
You want to see if it will leak before driving it and it get blown all over.
If you dont see anything then go for a little drive and check. If nothing then drive a little more and check.
Thing is to drive just enough to find where the leak is coming from but not blow it all over the place again so you cant find it.
Keep at it till you can find the leak.

You may need a mirror and a good bright light to see around the back of the motor.
Dave ----

 

Appreciate the info. I did check the ATF, it looks fine. No leaks around the power steering. My oil level looks fine as well. I’ll try your other suggestions. Appreciate it!

 

Pull the rubber boot and shine a light up into the housing.
Put your finger up into the bell housing ttowards the transmission and pull it out. If you're seeing red fluid it's likely the trans pump shaft bushing could have slipped and cut off the return hole in the pump opening. It will leak out the front of the pump face and then into the bell housing and out of the boot plug.
If you look up between the oil pan and the trans dust plate, you can usually see if the oil pan seal is leaking or the rear main.

When the rear main leaks it leaks down the back of the block/flywheel that's bolted right to the rear of the crank which the seal is around. The flywheel is inside the housing so the oil leaks into the housing as well as down the block in between the dust shield between the trans and the block. If you see wet on the front of the dust shield and also inside the bell housing then its likely the rear main.
You can pull the little window in the dust shield as well and see if there is oil dripping down the flywheel and inside of the dust shield. Both would indicate and rear main leak which is common in high mileage on these.