Quote:
Originally Posted by Warrior102
I have used Royal Purple, Mobil 1 ATF (Tremec recommended), Redline D4 and Royal Purple (again). I live in a sometimes cold climate and the OEM is next to impossible to shift to second and it will often pop out of gear when temps are below 40F. I started with RP and ran it (13K miles) -> M1 (200 miles) -> D4 -> (2000 miles) and back to RP again, they are all better than what GM put in there but the RP is the best overall in my car, I felt too much gear in 1>2 and 2>1st with the others. That said the RP seemed to shear out of grade around 13K and started getting slightly notchy so that prompted the change. The Mobil 1 was glass in every gear but 1>2 (grind) the Redline was better than the M1 but not as good as the RP. I have no problem changing the fluid every 12K as I would probably anyway. YMMV
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I have the exact thing with my car. The gears act like they have no lubrication at all
. I plan to swap the fluid out in the near future. I think the main reason I haven’t yet is because I can’t decide which one to go with lol.
I feel the oem fluid is mediocre, especially from what I’ve heard, so I have high hopes for improvement.