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post #1 of 6 (permalink) Old 10-25-10, 10:58 AM Thread Starter
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Diff fluid change

Hi everyone,

I've searched the site (and a couple others) and can't find a DIY on changing the diff fluid. I imagine it's pretty straightforward - I've done it on other cars, but does such a thing exist?

Thanks,
David

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post #2 of 6 (permalink) Old 10-25-10, 12:01 PM
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Re: Diff fluid change

It's the same as most cars. Remove the rear cover to drain it. If it's a limited slip, it needs the additive.

Bert
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post #3 of 6 (permalink) Old 10-25-10, 01:14 PM Thread Starter
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Re: Diff fluid change

Thanks again, Bert!
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post #4 of 6 (permalink) Old 10-30-10, 04:59 PM
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Re: Diff fluid change

Quote:
Originally Posted by Bert View Post
If it's a limited slip, it needs the additive.
Hi, the additive is called Friction Modifier, and it stinks really bad. But it works good to prevent clutch chattering.

BOB
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post #5 of 6 (permalink) Old 10-31-10, 01:17 AM
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Re: Diff fluid change

Also to be noted, use 80W90 for the civilians, and 75W140 for the police/taxi package. 4 oz. of the Friction Modifier that ROBERTSUNRUS mentioned will be needed if it is equipped with a limited slip.

Capacities:
Standard Axle 1.8 - 1.9L
Traction-Lok Axle 2.2 - 2.4L

Torque Specs:
Differential housing cover bolts 45 Nm (33 ft. lbs.)

-1992 Ford F-150 (winter truck)
-1998 Lincoln Mark VIII LSC (fun car)13.591@101.72mph
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post #6 of 6 (permalink) Old 12-19-10, 06:54 PM
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Re: Diff fluid change

Quote:
Originally Posted by Bert View Post
It's the same as most cars. Remove the rear cover to drain it. If it's a limited slip, it needs the additive.

Yeah its pretty easy. I used Mobil One LS 75-140 on my P71 last time on mine. LS meaning it already has the friction mod fluid in it.

There is a metal tab on one of the bolts holding the cover which will identify if its alocker or not. A locker needs the friction mod. There will be a code on it. Post the code here.

But whatever you do make sure you pull the fill hole hex first cause if you can't get that plug out you will be screwed if you dump it. Get it?
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