The amsoil 75w90 GL2-5 oil isn't the correct one for your tranny. Amsoil
makes a 75w90 that is GL 4 rated and is the one they recommend for
applications that require the friction co-efficient of a GL4 rated gear
oil.

If you use an oil that is more 'slippery' the synchro's don't operate
correctly.

Motor up is a chlorine based extreme pressure lubricant. It works really
well at being able to decrease friction, but it does this by creating a
layer of corrosion on the gears that lets the metals slide better
against each other. Chlorine ( yes like as in bleach ) is a very well
known EP additive, but its only used for things where long term
durability is not an issue...except for the snake oil companies who
ignored this bit of science and just use it anyways. Thats the reason
they can sell this stuff. The product does what they say it does...they
just don't tell you what it also does...kills your tranny or engine over
time.

> I recently decided to replace the transmission fluid in my 1982 Westfalia
> diesel 1.6.  I decided to try the Amsoil and at the last minute added Motor
> Up transmission additive as well.  The result was that the shifter moved
> smoothly until you tried to push it into gear which was very difficult and
> made an awful clunk.  I immediately drained the fluid and replaced with
> standard VW spec. fluid and all was well.  Anyone had similar experiences?
>
> David