Rear Differential Fluid Issue
Are you sure the oil specs on the back of your car are from the diff? I ask this because oil blowby from ring flutter will go out the exhaust, get caught in the car's eddy and splatter all over the back of the car. This is very common after a high speed run and I see it often on the back of track driven cars. Are you losing oil?


C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
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Are you sure the oil specs on the back of your car are from the diff? I ask this because oil blowby from ring flutter will go out the exhaust, get caught in the car's eddy and splatter all over the back of the car. This is very common after a high speed run and I see it often on the back of track driven cars. Are you losing oil?
Its surprizing how little oil in drips will cover the whole rear of the car in splatter !!!!! ..... like I said I opened the fill plug and oil level was completely full....this with the diff HOT.
With the minor oil loss I'm not concerned about going to the track next sunday. Plus I have some extra oil if necessary.
Thanks for the input
DH










same with me, put in Severe Gear 75w90 with no additives, and its still quiet over 1.5 years now.