5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

gear oil

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Old 09-21-2009, 04:18 PM
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1988TTOP
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what gear oil should i use for the diff
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Old 09-21-2009, 06:26 PM
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bump....
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Old 09-21-2009, 06:28 PM
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mjr46
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75w/90 with friction modifier
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Old 09-21-2009, 06:29 PM
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dose any parts store have the friction modifier and would it be worth runin synthetic
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Old 09-21-2009, 06:42 PM
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a lot of the synthetic based fluids such as Valvoline and royal purple will already have it in it, if you buy a standard fluid ask for a small bottle of limited slip additive
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Old 09-21-2009, 06:46 PM
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so should i go with royal purple
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Old 09-21-2009, 07:09 PM
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if you want.
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