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Gear Oil?

This is a discussion on Gear Oil? within the Drivetrain forums, part of the LSx Technical Help Section category; I believe the reccomended weight is 75W-90 for the differential. I have 75W-140 Max-Gear oil by Royal Purple. Would it ...

  1. #1
    Senior Member splitfinger09's Avatar
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    Bright Rally Red
    2000 Camaro SS #5075 M6

    Gear Oil?

    I believe the reccomended weight is 75W-90 for the differential. I have 75W-140 Max-Gear oil by Royal Purple. Would it be ok to use that weight? Also is the use of synthetics ok to use in my diff?
    Last edited by splitfinger09; 07-17-2007 at 04:42 PM.

  2. #2
    2 SS's are better than 1 Jays00ss's Avatar
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    NBM / Silver
    00 SS / 71 SS Elcamino

    yes, its ok to use that weight and synthetic oil is fine. However if you live in a cold climate, you might want to warm up your gears a little without haulin ass at first. + your gas milage will suffer with the heaver oil.
    Synthetic oil lets you run a lighter weight and gives you better protection like a heavier oil.
    I run royal purple 75w90 in mine. No problems what so ever. If you have a lot of miles make sure you check your pinion seal as they tend to leak. good thing to check your level at least every 6 months to yearly.
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

    1971 SS ElCamino 402 Big Block 550HP

    2006 Silverado 2500HD 496 cubic inches of pure muscle

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