Thread: F vs FA Transmission Fluid

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Originally Posted by nitrowarrior

F and FA are compatible. If you feel comfortable with running a non mixed setup, great. If you can't find the stuff you're looking for,don't be afraid to mix. The only thing is FA has a friction modifier add pack that is a considerable protection for the material in your clutch discs.

I am going out tomorrow morning to find the FA. That TCI transmission was just too dang expensive to try the mix. A C4 in a DD - no problem!!!





Got the FA fluid this morning - only had to drive 40+ miles RT in my Guzzle 10 to get it from the place I got the original fill - that stuff got expensive @$3.77plus 8% tax/qt

Hey there,
The FA is the way to go. F was used for years and in some cases will give you a firmer shift, BUT as stated the Fa fluid protects your tranny better. I have a TCI street fighter in my T and TCI did a great job of NOT telling us what other fluids to use. I debated and went with a valvoline FA and have had great luck. Don Jr.

Originally Posted by Mr Blue

Hey there,
The FA is the way to go. F was used for years and in some cases will give you a firmer shift, BUT as stated the Fa fluid protects your tranny better. I have a TCI street fighter in my T and TCI did a great job of NOT telling us what other fluids to use. I debated and went with a valvoline FA and have had great luck. Don Jr.

I have the FA in it now - unfortunately my TCI tranny, also a Street Fighter has a bad leak that I thought was a pan gasket(3 different pans, 5 gaskets) but now feel that more likely to be an internal crack to a pan bolt hole though haven't spent enough time trying to find it yet. The 11 pan bolt holes may get a set of studs glued in forever with J-B Weld or similar epoxy