A while ago I had to take my TR to a shop to have the diff bearer bracket
welded where it had cracked and we had to remove the diff of course. The
foreman suggested that while it was out we remove the plug and turn it on
it's side to drain the oil. Unless you drill and tap a plug into the bottom
of the diff I think this is the only way to change the diff oil in a 4 or
4A. Perhaps there is a way of sucking it out?
Topping up OTOH is just a matter of filling one of those cheapo oil cans
with a flexible spout and a little piston pump inside which will bend round
and fit into the plughole.
However I think the maintenance schedule for the 4's and 4A's does not call
for the oil in the diff to be replaced..........ever! Perhaps one should
arrange a very slow leak (as if you need to on a TR) from the diff so that
the oil gets progressively changed over say a five year period.
David Brister
1967 TR4A
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