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Old 04-01-2007, 02:05 PM   #1
65-72 chevytoys
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Rear end gear oil

How much oil to replace in the rear axle housing. 1 or 2 quarts, or just fill it to the top? What weight oil to use?
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Old 04-01-2007, 02:54 PM   #2
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Re: Rear end gear oil

about a quart and a half/ just keep filling till it comes out the fill hole on the side// i use synthetic mobil one or royal purple 75-90weight
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Old 04-01-2007, 02:57 PM   #3
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Re: Rear end gear oil

Yep. I always use synthetic. Manual trannies & diffs are not something that gets its lube changed all that often. Spent the extra loot on the synthetic!

Fill till it runs out the fill plug as stated above...
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Old 04-01-2007, 05:25 PM   #4
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Re: Rear end gear oil

Thanks. I just wanted to make sure I would not overfill. I will start with 2 qts.
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Old 04-01-2007, 05:50 PM   #5
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Re: Rear end gear oil

Just a note, Eaton recommends AGAINST using synthetic on their posi units.
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Old 04-01-2007, 06:12 PM   #6
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Re: Rear end gear oil

You need posi additive also...correct????
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Old 04-01-2007, 06:22 PM   #7
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Re: Rear end gear oil

Thanks for the info but it is just a regular open diff.
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