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Ford Raptor Forums - General Information
Ford Raptor Problems and Questions Forum
Differential fluid change - do I need friction modifier?
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<blockquote data-quote="Vash" data-source="post: 644337" data-attributes="member: 1159"><p>If the manual that came with YOUR truck doesn't call for friction modifier than save your money. Same with specified oil weights. Vehicles can have even mid-year changes so I wouldn't necessarily expect different year manuals to agree. If it was a big enough change that was retroactive then I'd expect Ford to revise older manuals. You can see online that there's been manual revisions. Also, I thought that various Ford techs here already confirmed that friction modifier was for LSD diffs and not the e-locker like what's used in the Raptor.</p><p></p><p>When I get back home, I'll check my Ford Service Manual to see if it has any special guidance for the 12-9.75" rear end with e-locker.</p></blockquote><p></p>
[QUOTE="Vash, post: 644337, member: 1159"] If the manual that came with YOUR truck doesn't call for friction modifier than save your money. Same with specified oil weights. Vehicles can have even mid-year changes so I wouldn't necessarily expect different year manuals to agree. If it was a big enough change that was retroactive then I'd expect Ford to revise older manuals. You can see online that there's been manual revisions. Also, I thought that various Ford techs here already confirmed that friction modifier was for LSD diffs and not the e-locker like what's used in the Raptor. When I get back home, I'll check my Ford Service Manual to see if it has any special guidance for the 12-9.75" rear end with e-locker. [/QUOTE]
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Ford Raptor Forums - General Information
Ford Raptor Problems and Questions Forum
Differential fluid change - do I need friction modifier?
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