Changing Rear Differential Fluid

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10-03-2007, 11:32 AM

LARIAT 85

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Changing Rear Differential Fluid

My 2wd 1985 F-150 has NEVER had the rear differential fluid changed. It has over 170K miles, and I was wondering if it would be wise to change it now, or is it too late and should I leave it alone?

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10-03-2007, 12:59 PM

horsepuller

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It's never too late. But if you decide not to pull the cover to drain it, at least remove the plug and make sure it's topped off.

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10-03-2007, 01:00 PM

gearhead351

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Quote:

Originally Posted by LARIAT 85

My 2wd 1985 F-150 has NEVER had the rear differential fluid changed. It has over 170K miles, and I was wondering if it would be wise to change it now, or is it too late and should I leave it alone?

change it now! juist because you go over on your engine oil change doesnt meen you wait another 3000! If you have a limited slip dont forget the friction modifier. I use regular 75-90 gear oil.

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