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Power Strokes
94-97 Tech
Factory Limited Slip - Synthetic AND Friction Modifier?
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[QUOTE="PsRumors, post: 695682, member: 676"] Changing the gear oil in the rear axle which has a factory limited slip unit. I am using Valvoline synthetic 75w-140 ( [url]http://www.autozone.com/autozone/accessories/Valvoline-Full-synthetic-gear-oil/_/N-255s?itemIdentifier=977483[/url]) which states "Limited Slip" on the bottle. So is a friction modifier also needed? My limited slip still works after 16 years and 130k miles. I want it to continue to work after the fluid change. Just don't have the money for a Tru Trac at this time. [/QUOTE]
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94-97 Tech
Factory Limited Slip - Synthetic AND Friction Modifier?
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