[bishopts]

Originally Posted by wakespeak

I use the Tremec oil as the ATF gave me grinding particularly in 2nd gear downshifts. You can fill the Tremec fluid up to the fill hole without the 1/8" drop because it doesn't expand as much when hot. If you overfill it will burp out of the vent at the top of the back of the trans. You might see a teaspoon on your driveway after a hot run.

It is stiffer to shift in cold temps, so will depend on your use. On the track the trans temps are > 200F.

It does take a couple of changes to get the ATF % mostly out because of the cooling circuit.

Personally I would not use 5w-30 because no gear type additives and also the wide viscosity spread will shear out.

Good info. I might go this route.