You didn't say what kind of "laborious" your shifting problems had, but if
shifting is simply getting stiffer, before you change
trans oil,   get a spray can of lithium (or other) grease, and spray the
shift rod where it goes through each of the two bushings
on its way toward the transmission (one right at the trans, one further
forward.
This was always the problem with our 87, since it didn't have the later
protective boots at those bushings, and the grease
periodically got dried out and mixed with road dust (I think VW added the
boots in 87-88, and you should be able to
retrofit them.)   Another symptom of the same problem is that shifting may
get easier in rainy weather, when the rain
acts as a temporary lubricant.

Dave
90 Westy

At 12:38 AM 6/11/00 -0500, SpaceKommander wrote:
>Question - does anybody have any experience using Mobil 1 Gearcase lube
>(75-90 synthetic)? I've got a '85 westfalia and am thikning of replacing
>the tranny/differential with Mobil 1. Shifting is getting laborious (yes,
>is adjusted correctly) and am interested in getting as long out of this as
>I can . . . .