Changing Rear Differential Fluid

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Oct 3, 2007 | 11:32 AM

LARIAT 85

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Cargo Master

Joined: Dec 2004

Posts: 3,362

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From: Florence, SC

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?

Oct 3, 2007 | 12:59 PM

horsepuller

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Joined: Sep 2000

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From: Southern California

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.

Oct 3, 2007 | 01:00 PM

gearhead351

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Joined: Dec 2005

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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.