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Transmission fluid.

PostPosted: Mon Mar 20, 2017 3:01 pm
by Greg-Cirillo
For what it's worth, I have 2-1/2 quarts of this stuff in the gearbox, and it's shifting faster and better than it's ever shifted.

https://www.amazon.com/Red-Line-Lightweight-Shockproof-Oil/dp/B000CPI5YG

I'm running Gen 3, original clutch and helical (not new straight-cut) gearset. Sure, the whole box might eat itself next time out, but it's so smoooooooooth. :shock:

Re: Transmission fluid.

PostPosted: Mon Mar 27, 2017 9:36 am
by cblough
I thought we were supposed to run 3 quarts, no more, no less. Am I mistaken? I'd very much like to fix that before MARRS 1 if I am.

Re: Transmission fluid.

PostPosted: Mon Mar 27, 2017 10:38 am
by breton
Fill until your level is to the middle of the speedometer gear. Some prefer to run a little less, but I prefer to have the safety margin in the event of a leak.

Re: Transmission fluid.

PostPosted: Mon Mar 27, 2017 3:56 pm
by steve kramer
We used to run 2 QT. on the G2 so if you pulled out the axles there was no mess. Mr. D specifically recommended to me to run 3 Qts., due to the higher loads and more RPM the engine spins the gearbox with the G3.

Re: Transmission fluid.

PostPosted: Mon Mar 27, 2017 5:02 pm
by dave
I believe in following the advice of the guy who built the trans. :)

Re: Transmission fluid.

PostPosted: Mon Apr 03, 2017 2:25 pm
by Zealous
When I talked to the guys at Red Line Synthetic they recommended D4 ATF for the transmission.

Re: Transmission fluid.

PostPosted: Tue Apr 04, 2017 10:56 am
by srf99
Once you get a gearbox rebuilt with the new gears, you may want to talk w/ Nikki at Enterprises. I believe there was a specific fluid they were suggesting, but I'll defer to Nikki on further communications.

Re: Transmission fluid.

PostPosted: Tue Apr 04, 2017 4:13 pm
by Greg-Cirillo
The explanation that made the most sense to me (from a trans rebuilder) was that the transmission was used in Fords and Mazdas. Ford spec'd an ATF because it was better in cold weather. Mazda spec'd a manual trans lube. So when used in the SRF, they went with the Ford recommendation. If it was SRMazda, we'd probably all be using gear lube.

It's a non-exotic, non-LSD, synchro street gearbox. I think it's multiple choice question, and all answers are acceptable.