| What would you say is a proper operating temperature range for the diff? I'm only open tracking, where sessions are much shorter at lower speed; I'm not sure if the rapid acceleration and deceleration on a road course or the consistant high speed in your case would heat the diff more, less or similarly? In any case, I normally don't spend more than 40 minutes driving hard in one single session, usually a little more than half that. Your open road racing events, are those the higher speed, mild turn competitions like silver state classics or cruiZin USA? :)
Cheers, Salah Aztec Red 300ZX Twin Turbo Platinum Mist Metallic 300ZX 2+2 
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