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ATF Choices for a Harley-Davidson FLHT Primary
I have been told that many Harley owners use Type F (Ford) ATF in their primaries, for one thing to make it easier to find neutral. I have some Mobil 1 Synthetic ATF Multi-Vehicle Formula that I was thinking about putting in my FLHT primary, but the back label states that it's not recommended for Type F applications. I don't want to put it in my primary if it has a lot of friction modifiers in it because I don't want to cause clutch slippage. What are your thoughts on using this ATF in a Harley primary? Thanks.
-- Ken Carpenter, Buford, GA
Although an ATF may work, we suggest shying away from using it due to the low viscosity of ATFs and the possibility of premature chain wear and/or noise. We recommend Mobil 1 Racing 4T 10W-40 for Harley primary transfer cases. Alternatively, one could go with Mobil 1 V-Twin 20W-50.