My DII has had a leak at the right rear wheel for as long as I've it (Bought in May 2012). I first replaced the O ring, and when that failed, the O ring and the bearing assy (used, admittedly).

Is there anything else at the end of the axle that can leak that I should be looking at, or should I revisit the bearing/ o ring again? Or, is there anything that would cause a bearing seal to repeatedly give out?

 

Are you sure it's gear oil and not brake fluid?

Maybe you just got really unlucky and got a bad used hub.

 

I'm 99.9% positive that it is not brake fluid, as the brake fluid level since the last flush a year ago has remained unchanged. With the rate of leakage over a year, it would have to have been much lower.

The gear oil level is a bit harder to gauge, as it's always slightly overfull since I fill the diff with the rear of the truck raised.

 

Hi

It could only realistically be the 'O' ring in the hub unless the other mating surfaces are scored or damaged. It needs carefully fitting with a new 'O' ring which I have found best if very liberally smeared with silicon high melting point grease first helps to retain it whilst refitting the hub. If the hub surfaces are damaged or scored if it were me I would re-assemble them using a smear of RTV. When reassembling the hub everything needs to be spotlessly clean, dry and free from any grease or dirt and the hub torqued to the correct setting. I cannot otherwise imagine where else the leak is coming from. Check out page 51-3 of the RAVE Manual for the cross section of the hub. Good luck.

 

Clogged axle breather tube.
The diff is building up pressure and blowing the seal.
I had that problem with my truck when I first got it, pinion seal was leaking, replaced axle breather and no leaks.

 

If it is not gear oil or brake fluid, the only other possibility would be gear grease from the used hub.

 

I was able to blow air through the tube with my mouth, so I'm ruling that out.

Looks like another hub assy is in my future...

 

while you're down there....ok, so the vent tube isnt plugged.....now check the vent fitting on the diff case.....a lot of times that rusts and plugs even though the tube itself is ok....

 

Is that rusty banjo fitting a D1 thing? My D2 has plastic push retainers for the axle breathers. Push down on the retainer, pull up on the tube to release, that whole affair.

 

What he said, plastic or not they can still clog.