I got a used truck about 3 months ago which is now having clear transmission fluid leaks and engine oil leaks. The former is more severe while the latter is minor. I've selected to focus on the transmission first (yes I have positively identified trans. fluid coming from the torque converter area, and from the rear passenger side gasket area; the engine oil is definitely separate and appears to also be coming from it's gasket). I have noted that about 4-5 of the trans. pan bolts have stripped the pan threads. I plan on tapping an rethreading with one size higher, from a 10 to 11 for the bolt. Please advise if there is a better course of action. At first I thought I'd do the rethreading before removing the trans. but at this point I realize it would probably be best to take the plunge and open her up to make sure I don't need a new transmission. This is a 4 wheel drive truck, so I've been told by my neighbor that the transfer case will need to come down too. There appears to be some leakage along the transfer case too. The only thing I've bought so far is the filter, which I have 2 of, one has a deep neck and the other is short. The filter came with a new gasket. The guy at autozone just told me to return whichever one I didn't need since neither of us knew which one was required. If any one has any advice I'm all ears. This will be a slow project as I've got a chronic injury and I'll have to work around it. So far as traveling goes, the shifter seems to work fine. I've had the occasional problem where I think it's in drive but it's in neutral and I have to shift it another notch. So I need to get that fixed. Again, I'm all ears and this is my first ford f150. I hope the work on it goes as smoothly as it did when I rebuilt my integra engine. Thanks for any help all!

 

The original pan gasket is a black rubber part. It is reusable and far superior to the cork gaskets that come with the filters. You'll need the deep neck filter for a 4x4.

A better way to fix the threads is with a HeliCoil. They are available at all parts stores.

You will need to remove the transfer case to get the trans out.

The shifter problem is probably loose bolts on the steering column. There are two Torx head bolts on the underside of the column not far above where it goes through the floor.

The fluid coming from the torque converter is probably the torque converter hub seal. The stock seal wasn't very good. The aftermarket has a better seal made of Viton. While the trans is out and apart to change the seal you may also need to change the torque converter hub bushing, and if the sealing surface on the torque converter is not perfect you'll need a new converter, too.

 

Thank you very much for the response Mark. I'll use the Helicoil's after having looked into them. The two filters that I got came with rubber gaskets. I'll be returning the short one asap. Nothing like living your life around a damned chronic injury. Thanks for the rest of your description. I've got my fingers crossed this will require a minimal amount of money to be fixed. I've heard from my neighbor that I can rent a type of jack which literally attaches to the transmission to make it easier to remove. Do you know any thing about this and what locations might rent such a jack?

 

A tool rental shop? It's called a transmission jack.

 

I have a 93 f-250 e40d transmission it is a some what simple job to take out the trans i would say the trans leak is the seal like mark said an while u r down there check your rear main seal cuz if you pull the tranny might as well look at that to. When u say oil leak is that the oil pan were it leaks or can u find were it leaks if not the rear main seal could of gone out. I am in the middle of puting back in my e40d transmission in my truck if u have any questions feel free to ask on taking it out an putting it back in. When i took mine out i remove the pan on my floor in my truck an use a cherry picker to take it out an put it in.