Diff. Fluid Change

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Jan 12, 2012 | 12:38 PM

Longdistancetrucker

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From: Yorktown, NY

Diff. Fluid Change

Just wondering, I've got a 2002 F-150 XL 4X4 w/ 66,120 miles, anyone else think its too old (age and mileage) to change the rear end fluid?

Jan 12, 2012 | 07:55 PM

blue2golf

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From: Evansville IN

Actually, mileage wise, I think it's too soon. Age wise, it's a good idea and it's not that difficult. Get the oil, get a new gasket, some RTV, set aside a saturday morning, tune the radio to Car Talk and enjoy.

Jan 12, 2012 | 08:58 PM

steve(ill)

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It is always a good idea fo drain and flush the factory fill oil on any system after a break in period. There can be wear materials from break in that can get into the bearings and cause shortened life. Go for it. NEw spec is 75 w 140 synthetic

Jan 14, 2012 | 08:42 AM

Longdistancetrucker

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From: Yorktown, NY

Thanks guys, gonna do it next weekend when its not raining....

should I use RTsealent or find a gasket for it? It has RTsealent on it now...

thanks again,
John

Jan 14, 2012 | 09:33 AM

steve(ill)

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Anthing built in the last 10-15 years uses RTV, not a gasket. Make sure the pan face is smooth and flat. Bump with ahammer if needed. I like the Red RTV.

Jan 15, 2012 | 12:22 AM

whitefordexplorer

Tuned

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From: Beaumont, CA

I use grey RTV silicon sealant. also, while you have the cover off, it would be a good idea to check to see if you have any mechanical issues, such as metallic shavings, or solid metal pieces in the diff. this could be a sign of serious failure.