1997 - 2003 F-150

Upgrading to Limited Slip Differential

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Old Jan 8, 2011 | 10:24 AM
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Chasin Tales's Avatar
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Upgrading to Limited Slip Differential

I have a 2002 2wd with an open differential, I bought a new limited slip differential and my cousin is going to install (his line of work). He gave me a lis of parts to get to perform the upgrade. I am having trouble finding the right part number for the axle bearings.

It is the 9.75" differential. Any thoughts on where to find it? I went on the Timken website and was having a little trouble navigating to the right spot.

Thanks!
 
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Old Jan 8, 2011 | 11:59 AM
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The easiest way to get the right parts is to use a reputable drivetrain shop, or a place like Randy's Ring and Pinion, or accuautoparts.com. Use the info found on your rear axle tag to be sure you get the right master rebuild kit. On my rig, the 9.75 axle was built early in 1999, so it used an 8.8 bearing size, and different axles,than the 9.75 from later that year.
Do your research, cause you don't want to order the wrong parts. Not sure where you live, but in my case, the nearest parts dealer is on the internet. Last thing you want is a driveway full of parts for a week.
 
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Old Jan 8, 2011 | 01:46 PM
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Originally Posted by Chasin Tales
I have a 2002 2wd with an open differential, I bought a new limited slip differential and my cousin is going to install (his line of work). He gave me a lis of parts to get to perform the upgrade. I am having trouble finding the right part number for the axle bearings.

It is the 9.75" differential. Any thoughts on where to find it? I went on the Timken website and was having a little trouble navigating to the right spot.

Thanks!
I didn't know the 2wd got the 9.75"
 
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Old Jan 8, 2011 | 03:06 PM
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glc
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All 5.4's got the 9.75 or the 10.25 (7700 package).
 
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Old Jan 9, 2011 | 09:07 AM
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thanks for the replies. I did find the right parts for the 9.75. It even had the schematics.

Hoping that the tear down proves that the tacgs on the housing and the bolt pattern confirm what I think I know. at least the garage is heated!
 
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