From the Mobil 1 Product data sheet:

"Mobil 1 Synthetic Gear Lubricant is suitable for all automotive
applications where lubricants meeting MIL-PRF-2105E, API Service GL-5, are
recommended. It can also be used in rear axles where an API Service GL-4
lubricant is recommended. It should not be used in transmissions requiring
an engine oil or automatic transmission fluid, or GL-4 performance level."

Yur transaxle requires a GL-4 lubricant.  GL-5 oils have an additive that
attacks bronze components, like the VW synchronizer gears.  I use Redline
synthetic gear oil in both of my vans.  It costs $9-10 per quart and is
available at some retailers and also directly from Redline at
http://www.redlineoil.com/

Mike Snow
Camp Pendleton, California
1982 Westfalia 1.6TD
1983 ASI 1.6D

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
Of SpaceKommander
Sent: Saturday, June 10, 2000 10:38 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 85 westfalia tranny lube question

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 . . . .