> > I just wanna get the right stuff the first time.
> > Ordered Redline manual trans fluid today from Imparts along with other stuff,
> > I described my vehicle-87 5kTQ, they said use the MTL4, so I went with it.
> > Then I remembered I saved phone number for Redline that I saw posted here
> > awhile back-called them and asked which fluid, they said MT90 is
> > correct.(??!??)
> > So I called Imparts back and changed it to MT90, but I'm left wondering. Can
> > anyone confirm this. The manual calls for GL4 type.
> This has been discussed, here's the scoop...
> MTL and MT90 are the same formulation but different weights. If you want
> a 75W-90 weight use MTL. If you want a 80W-90 weight use MT90. Redline
> quotes MT90 because their listing specifies a 80W oil for Audis. The
> owner's manual (at least mine - '86 5ks) says 75W so I put in MTL.
> I have about 9K miles since then and shifts are smoother (synchros spin
> up faster) and no discernable correlation to temperature. Shifting is
> easy from 10 degrees to 110 degrees.
I too got the MT-90 recommendation from Redline and checked the owner's
manual which confirmed the MT-90. I have had the MT-90 in the transmis-
sion of my QTC for a couple of years now and share Bob K's experience.
The reason that I am cluttering the net with this message though is that
I actually used a different oil for the rear diff. I believe that the
Bentley calls for GL-5 in the rear diff. As I recall I used Redline
75W-140(?) GL-5 there.
There has been discussion in the past whether MTL or MT-90 is appropriate
in the tranny ... in the final analysis you will probably find that it
really doesn't make that much difference ... if you can get to the quattro
list archives on the web, you might want to look back a couple months ago.
San Jose, CA (USA)