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95 8.8 LSD Oil Change


mxboy349

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Changing the oil in my 95 8.8 LSD. I got 80w-90 "Limited Slip" oil. Do I need the friction modifier?
 


19Walt93

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What brand is the oil and what does the bottle say? Motorcraft gear oil requires friction modifier.
 

RonD

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If it says "Limited Slip" oil then the friction modifier is already mixed in

The friction modifier allows the clutch packs to slip better when going around corners, without it you would hear/feel a jittering from rear axle as the clutch packs were not slipping easily, so not smooth cornering
Friction modifier doesn't hurt anything to use it in OPEN differentials
 
Last edited:

mxboy349

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Castrol 80w-90 Limited Slip GL-5 is what I got.
 

RonD

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Should be fine
 
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