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Rear Differential Fluid Type

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Old May 14, 2005 | 09:24 AM
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ALF1999
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From: Greenwood Wisconsin
Question Rear Differential Fluid Type

I was going to change fluid in rear differential in my 1999 F250. Was wondering what would be the best fluid to refill with. I frequently tow heavy Rv trailer. Thankyou Alan in Wisconsin



 
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Old May 14, 2005 | 09:40 AM
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I would say 75/140 synthetic. Some synthetics may not require a friction modifier.
If going with Ford 75/140 then pick up the XL3 modifier.
 
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Old May 14, 2005 | 12:11 PM
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From: STEPHENVILLE,TX!!!!!
i run the amsoil 75-90wt extreme pressure oil. no friction modifier for the limited slip. works great, im towing a 12k trailer 3x a week with the truck no problems
 
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Old May 14, 2005 | 03:44 PM
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ALF1999
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Thankyou for the info this forum has been a big help. ALAN
 
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