ericcs
Member
i changed the oil in my rear diff and the thumping went away for a bit, (i noted that the diff was pressurized) later it came back also with a vengeance, so i have taken the diff vent out (again pressurized) - there is a spring in it that forces the diff to maintain slight pressurization, but my vent was actually stuck closed, i have unstuck it, and refitted it and the thumping is gone, (i am modding the vent to put a hose up to near where the front diff vent is)
take your vent out and see if there is a hiss of escaping air, its on the right side of the axle halfway between the rh wheel and center housing looks kinda like a mushroom, when you get it out blow through it and see if its restricted
thanks for the tip, i'll try and checkit tomorrow. must say, that when my car went in for a seal replacement, the thumping was gone, but came back gradually. hopefully your on to something
cheers
eric