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MLK2015

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  1. MLK2015

    2015 Rear Axle Gear Oil

    I changed the PTU and rear axle lube last week at 18,000 miles and used Red Line 75W-140 synthetic lube in both. Will the 75W-140 cause any harm in the rear axle? I don't tow and and the AWD has only engaged maybe 3 times in the last 4 years. Should I go back to 80W-90 gear lube to be safe?
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