When I had a '91 AT Westy, I changed the screen and lube at about 80K mi
and it made the shifting much more crisp, and much less sluggish when cold
in winter (Salt Lake City) temps at startup, before warmed up.
IIRC, it was Redline I changed to, which may no longer be best. I'd strongly
suggest using a good (Swepco?) synthetic.

Bob

On Feb 26, 2013, at 9:16 PM, Spencer Allen <spencervw@AOL.COM> wrote:

I don't remember for certain but some time (years) ago there was talk about NOT changing the fluid in an auto tranny because it would have a negative effect. Can someone  post the latest word on when or if to change the AT fluid. I have a auto 85 Westy with 86K and I don't think the trans has ever been serviced. Thanks for any info.
Spencer