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Center Diff locking problems in 87 4KCSQ
Thanks everyone for the help on the "clunk". I am going to replace the
control arm bushings and ball joints this weekend and cross my fingers.
On another note, When I purchased the car, both the front and rear diffs were
not functioning. I checked the vacuum lines and they checked out. The
cuplrit was the servo units (both would only move one direction and not the
other). Attempted to find used units to no avail and priced new ones from Audi
were major $$$$. Found an intermediate solution, mercedes door regulators are
almost identical (except for missing one of the bolt holes), and were about
1/3 the price. I installed both of them and now the rear diff works great.
The front, on the other hand is still stickey. It will engage _most_ of the
time at different speeds but when it does it makes a loud "thwang" and you can
feel it shake the car. Once it engages, it does fine. Disengaging it can
only be done by completely stopping the car and going into reverse and coast a
bit backwards. Others I have spoken with seem to think it is internal in the
diff from possibly years of non-use and rust. Any other ideas.....?
Thanks in adavance for the help
Rob DuVAlle, firstname.lastname@example.org