03 IRS Diff Oil - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 3 Old 11-26-2016, 01:40 PM Thread Starter
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Arrow 03 IRS Diff Oil

What diff oil are you guys running? The car is a 2001 GT with factory 3.55 gear IRS that sees mostly spirited drives. I have used Royal Purple is my daily SRT8's IRS but not a big fan of it. Wondering if RP will serve my Mustang better?


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post #2 of 3 Old 11-26-2016, 05:00 PM
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Any synthetic 75W140 gear oil with the friction modifier additive.
Some guys like Amsoil, Redline or the Motorcraft branded stuff.

Takes about 1.3 quarts.

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post #3 of 3 Old 11-28-2016, 08:46 PM Thread Starter
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Thanks 2D.

A guy walked into the second classroom session late, sweating profusly, hair straight up with dirt all over him. He sat down, raised his hand and said: "please explain brake fade to me!"
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