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Motorcraft Additive Friction Modifier??

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Old Feb 8, 2007
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Motorcraft Additive Friction Modifier??
Hi All,
What exactly is Additive Friction Modifier used for? It comes in a little 4oz. plastic bottle.

Thanks.
 
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Old Feb 8, 2007
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its used for your rear end if you have a clutch type limited slip diff.

EDIT: It helps keep your posi working.....
 
Last edited by greygooseranger; Feb 8, 2007 at 07:12 PM.
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Old Feb 8, 2007
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u dont need it if u change the lube to a synthetic with an additive already blended in
 
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Old Feb 8, 2007
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Originally Posted by fddriver02
u dont need it if u change the lube to a synthetic with an additive already blended in
Yes this is true....
 
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Old Feb 8, 2007
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i got it at the dealer and they new exactly what i was talking about . It was cheap i think.
 
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Old Feb 8, 2007
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if your running any SYN tech in your rear end its not need as they already said if its the old like 30-90 or whatever that crap is you gotta add it..alls i know is after awhile in that rear end it smells like a$$
 
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Old Feb 9, 2007
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I don't have a limited slip. I have an open 8.8 with a 4:10 ratio and it makes a whining noise around 40-50 mph. Would this additive help quiet the gears?

Thanks
 
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Old Feb 9, 2007
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My rear end makes that noise too. The friction modifier will not quiet your rear end. Time for a rebuild or an upgrade.
 
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Old Feb 9, 2007
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