Follow up on a rear end oil leak on a 3/4 ton truck
I had oil from the rear differential appear around the rear wheel lugs,shop manual said put locktite around the bolts which stopped the leak for a few days then the differential began leaking around the pinion seal (and making a pretty big puddle) which I replaced,this stopped the leak for a few days then the new pinion seal started leaking again......another truck owner said to check the rear axle vent tube which I did not find in the shop manual. This vent tube is on top of the rear axle about 6 inches from the differential on the drivers side.once this was removed and cleaned the rear end leak finally stopped, I guess the oil in the diff heats up and expands and then exits out the weakest point. Cleaning the vent tube first would probably have fixed it from the start. Are these axle vent tubes on all AD trucks? Thanks
