Correct Trans Fluid for '86 4KQ?

[TM]

Brandon- I am not a transmission expert, but I know that you
should _only_ use a GL-4 rated gear oil in your transmission.
You should follow the specification as provided in your owner's
manual and in the Bentley manual as to the actual weight and spec.

Redline MT90 is one gear oil that is within spec- MTL is too light.
Do not use a GL-5 oil in your transmission. You also cannot go wrong
with the factory Audi oil- that's what came in the transmission. I
cannot get a straight answer from Amsoil, so I would personally not use
their 75W90 oil in a transmission without confirming that they have a
GL-4 spec oil.

That said, I have Redline MT-90 for the transmission and Amsoil 75W90
for the rear diff waiting for me to replace the current oils in both.

Taka