I just changed my diff fluid in the rear axle and now every time I park uphill in front of my house, there is oil leaking out of that filler plug....

I did not overfill it - level is 1/2 inch below the hole (right where the mark is stamped into the cover) when truck is leveled - I triple checked. And it has nothing to do with fluid temp, etc.

The plastic gasket/washer looks good, no cracks, etc. (but obviously doesn't seal it).

I tightened it twice already and it must be at least 35 ft-lbs ...if not more... (more would make no sense IMO and spec is 32 Nm). {edit: I meant 35 Nm not ft-lbs}

I remember I had the same BS the last time I changed it. But I cannot remember how I fixed it...

Am I the only guy having this problem?

Where can I get a copper or aluminum washer to replace that stupid plastic one... I checked at Autozone and Kragen, but they are too small....

 

Have you tried some pipe thread tape?

 

I had the same problem on my front cover. New washer from Oreilley's did not work. Teflon tape did not work. Applied a little silicone to the threads and the problem went away.

 

Ditto.... Teflon tape will seal it.

 

thx - will try the Teflon tape right now...

 

I have found yarn works well. running ford 9'' gears in the race car we change them from track to track. instead of using silicone or a gasket we always use yarn and works very well. I have used this in many applications over the years. No reason to scrap gaskets on many items.
I run about 3 wraps around anything I am working with and it makes for a great gasket.

 

yarn huh? interesting. that sounds pretty trick. what kinda yarn are you using? any specific thickness or diameter?

 

lol, Yes yarn. The guys at the tracks are always scraping silicone and pilling on more orange goop every time they change a gear. I only have told my buddys about the yarn and they love it.

As far as thickness I dunno, its a large ball of it that my Mother used to knit with. I have used the same roll for 10+ years.

I would guess it to be 1/8'' thick and use it on many applications now.

 

Worked great... I used the yellow tape (made 1for gas and petroleum applications)...

 

Any leaks in the diffs, always check the vents for being plugged.

 

where are the vents? I couldn't see a hose, etc. coming out of the housing....

there is a speed sensor plug (which I thought is an Elocker when I bought it)