My 89 Westy is shifting fine when cold. When warm it is: hesitating,
then going into reverse with a "clunk"  Forward engages without
hesitation, but seems to stay in 2nd longer than it used to.

What I did: drained the sump and refilled with Mobil 1 syn auto trans
fluid. about 1K miles ago. I thought I did my research and thought the
fluids would mix ok.  Could this be related or could this be something
that may have come about anyway? There is about 80K miles on the trans.
and has never given any trouble. . Until Now

TIA

Fred
89 Westy
98 NB TDI