My '77 Ford F-150 w/ 9" rear. Running 38" Super Swampers, 5:13's and a Detroit in the back. I replaced outer seals and bearings in the rear end. I can not get it to stop leaking fluid into the brake drum. Appearantly, the seal isn't working/installed correctly. The axleshaft seems ok, not worn excessively. I gooped the inside lip where the race meets the stop in the housing. No help there.......... Totally mystified. It's seems to be coming from between the axleshaft and the bearing????? :confused: Any ideas? There's millions of this rear end out there, maybe it's happened before????

Check the axle shaft for pitting, grooves and what not. sounds like you cuold have a bad axle shaft. They make sleve kits for this, but you would be better off putting a new axle shaft in there

That's a good possibilty...... I'll give it a shot. Not much to lose. Something esle i came up w/ is maybe the yahoos at the machine shop didn't 100% press it on. Don't know if that would make a difference or not.... Thanks.

Did you have the bearings pressed onto the 9 incher axleshafts? Maybe they wern't pressed in right.