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Dana M200 vs. M220 Differential Lubricant

calemasters

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From what I have read, my 2021 Rubicon has the Dana M220 rear axle with a locker (not Trac-Lok). I am curious why the M200 axle specifies 75w-140 lubricant while the M220 specifies 75w-85 lubricant? I thought the M220 would require the heavier oil?

Any explanation?

View attachment 397023

View attachment 397020
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mygreenkaw

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