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Re: Which Redline trans fluid?
> 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
> 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.