Re: 5kcst's autobox final drive oil question...

["Fred Munro" <munrof@isys.ca>]

Hi Albert;

    As I recall, the original oil in the 5k slushbox final drive was not
synthetic. With time, the light components of the oil boiled off through the
tranny vent, cooking the tranny output shaft seal and letting the tranny and
final drive oil mix. This ,of course, led to the well known Audi slushbox
meltdown. I think Audi put out a TSB recommending the original final drive
oil be drained and refilled with synthetic.

HTH

Fred Munro
'91 200q  276k km
----- Original Message -----
From: Albert Ng <alng@expert.cc.purdue.edu>
To: <quattro@audifans.com>
Sent: Thursday, July 01, 1999 10:39 PM
Subject: 5kcst's autobox final drive oil question...


> Hi guys,
>
>
> I am about to change the final drive oil for my 5kcst (3 speed auto).
> I bought some synthetic Mobil1 GL-5 75/90w gear oil the other day at
> AutoZone.
>
> However, after I checked the owner's manual and Haynes, it says:
> Final Drive oil --- GL-5 80w  0.7 qt
>
>
> Gees, I wonder if I can use the Mobil1 without the risk of frying the
> final drive and the tranmission? Do you guys think Mobil1 compatiables
> with the factory oil? They both are synthetic oil anyway, right?
>
>
>
>
> TIA
>
>
> Albert Ng
> '87 5kcst
>
>
>