Oil leak under the M38

[maple_leaf_eh]

I have a JP Magazine article on how to rebuild the T90 transfer case, and if you go on line there are a couple of thorough step by step websites.

There is a weeping hole on the bottom of the bell housing that reacts to high oil pressure(?). I remember having to lay the drip pan under one of our militia M38A1s after an exercise because of exactly what you describe. I thought we'd blown something until the mechanic sauntered over and did a few checks, shrugged his shoulders and said no problem with this one. Back to something more important.

[rob love]

Originally Posted by maple_leaf_eh

I have a JP Magazine article on how to rebuild the T90 transfer case, and if you go on line there are a couple of thorough step by step websites.

There is a weeping hole on the bottom of the bell housing that reacts to high oil pressure(?). I remember having to lay the drip pan under one of our militia M38A1s after an exercise because of exactly what you describe. I thought we'd blown something until the mechanic sauntered over and did a few checks, shrugged his shoulders and said no problem with this one. Back to something more important.

That hole on the bottom of the bellhousing lets out the seepage from the engine rear seal, and also lets out any seepage from the transmission front seal. Any excess leakage into there can oil soak the clutch causing it to slip. That little hole is also the one referred to on the dash "bellhousing decal where is says to "install bellhousing plug before fording/remove after fording".

I saw a deuce once where the operators had so much oil leaking from there (thinking that the plug had fallen out), they called recovery. When recovery took too long, they whittled a plug out of wood and drove her home. Monday morning I removed the stick and let all the accumulated engine oil drain from the bellhousing. Of course, the engine had developed a knock from lack of oil and had to be replaced now.

[charlie fitton]

What's been over-filled?

Deuce had an automatic tranni...

f

[rob love]

Originally Posted by charlie fitton

Deuce had an automatic tranni...

f

Yep, but it still had a drain hole on the bell housing. In this case it was the engine that leaked and not the transmission.

[Wpns 421]

Following the posts and having my Friend Dave from Windsor look at the vehicle we found that the transfer case outseal seal was the leaker. We also found the the seal on the rear diff had been sealed with silicone. We ordered the parts and they should arrive next week.
We also ordered new parking brakes and paint to redo the vehicle. It should be an interesting project.

Gilles