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Old 05-02-2013, 01:36 PM
defilade's Avatar
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gear oil recommendation

what fluid should I use after initial ring and pinion break in and posi install, i have amsoil severe gear 75w 90 in there now but I read bad things about it on internet

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Old 05-02-2013, 02:18 PM
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I used that same oil for 15 years in hundreds of rear ends that I built and none of them ever had any problems except two. One was a Borg Warner rear end in a '04 GTO with a cone type differential. Had to change it to Torco oil to make it quiet again. The other one was a '96 Impala SS with an Auburn differential, which is also a cone type. I had to put 2 bottles of GM oil additive in it to make it quiet.
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