Quote Originally Posted by Pranav View Post
I've been running plain non synthetic pennzoil synchromesh. It's a touch notchy when cold but shifts like butter after the first warmup lap.

The tremec guy here in TX said for what we do the shear resistance and protection of synchromesh is better than just running dexron iii, and to run the pennzoil (also valvoline, which is just pennzoil in their bottle) synchromesh.

For a street t56 I would run regular dex III to avoid the notchines/wear from cold shifting.

Then again I also ran synthetic redline D4 for four seasons and when we took it apart to do the LS conversion everything still looked great, so I have no idea lol.
Pennzoil...eww