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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

how much friction modifier?

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Old Mar 17, 2012 | 03:58 PM
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how much friction modifier?

Can somebody tell me how much friction modifier to use on the rear diff of an 06 f350? I know some oils already come with it in it but i already have the oil and a 4oz bottle of the additive. The parts guy says use the full bottle but i've done some searching around and see anywhere from 2oz to 8 oz.
 
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Old Mar 17, 2012 | 04:05 PM
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I can only speak for a Ford 9" posi and I used the whole bottle per the parts person.
 
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Old Mar 17, 2012 | 06:53 PM
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anybody else??
 
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Old Mar 17, 2012 | 07:09 PM
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2 bottles will get you there
 
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