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Old 11-20-2009, 09:52 AM   #1
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Default Diff viscosity and heat

How much would the diff oil viscosity change from the summer months to the winter months? Do you need to use a thicker oil in the summer to get the same results?
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Old 11-20-2009, 09:57 AM   #2
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silicone fluids do get thicker in cold, and thinner in hot, but i would think the diffs get hot enough on thier own to where it really wouldnt matter

the shocks on the other had are definately affected by the temperature
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Old 11-20-2009, 04:36 PM   #3
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During the summer months here in Florida I usually run 4-6k in the front and 5-7k in the center and 2-4k in the rear. Usually with an end result being 5-7-3. Now during the winter we usually night race and its gets fairly cold in North Florida. Low 30's maybe high 20's and I will usually go 3-4-2 to smooth out the car as well as dropping the shock weight atleast 5wt. Hope this helps.
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Old 11-21-2009, 12:13 AM   #4
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The oil in the diffs is normally thick enough that normal air temps do not effect it, any heat is built up during normal use & diff action during your runs.
So any changes would normally be done to suit track conditions only.

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