TAI2

Regarding the Millers gear oil, why are you using the non-LS version? I have a Guard LS differential and wondering which oil to use.

Millers says: "For plate type Limited Slip differentials use CRX LS 75w90 NT".

Thanks.

Tom

Mvez

Matt from Guard covered this about Delvac (which is also non-LS), and upon Andy's discussion with Performance Oils (who we buy it from), they agreed that the non-LS version will be better in a motorsport application.

Matt let us know that the friction modifiers in the Porsche factory fill are more for cold starts and syncros, to make shifting smoother....but the problem is that as the gear oil gets really really hot from track use, it actually becomes too slippery and doesn't do a good enough job of lubricating and protecting at high temps, which is why the Delvac (non LS) works better on track and is Cup car fill. Also, it allows the plate LSD's to lock up as they normally would. Same for the Millers Oil.

So for street only, I would say use the LS version, but for mostly track use, use the non-LS.

GTgears

If you want to make your LSD lock less effectively and wear out more quickly. then by all means use an LS oil in your gearbox.

I will say it one more time. LS gear oils are put out there for OEM LSDs that are noisy and clunky. They are also for el cheapo aftermarket LSDs that use steel plates instead of a plate with a proper coating on it. LS additives are more slippery and make it more quiet. If you want your motorsports LSD to lock and perform the way it was designed to, don't put that junk in there. And by junk I mean an LS additive. Miller blends excellent oils.



30 hours of run time, 24 of which were the Rolex 24 Hours of Daytona. Less than .05mm of measureable wear. No LSD additive in the oil.

Regards,

Matt

TAI2

Thanks for the feedback on LS versus non-LS formulation!!

Sweeper

swepco 201 in every MT i own including the FF hewland

GTgears

Swepco makes excellent gear oil though I prefer 210 in a race car. That's what 3R used exclusively in their Cups when they raced WC before moving over to the Volvos.