Aftermarket Limited Slip for 9.75" Diff?

[Cucamongan]

Hello,
I have a 2004 Ford Expedition with a 5.4L 9.75" IRS open differential.
Does anyone recommend a particular brand of limited slip differential?
Any particular aftermarket parts dealership that will give a discount or reasonable price for using their business?
I have rebuild an axle or 2, but should I have a certified shop do the install?

Thanks for info in advance!

 

[pronstar]

Where are you located?

 

[Cucamongan]

Hey,
I just updated my info.
I live in Rancho Cucamonga, about 50 miles North East of ya
But willing to travel to get a better deal or service

 

[pronstar]

I went to DiffWorks in Riverside. They do good work and seem to be good people. They've done diffs for a few cars for that show Overhaulin'.

You'll have to call for more info, their website doesn't list everything they do.

http://www.diffworks.net/

 

[Cucamongan]

Got some good info

After talking with Diff Works (those guys know their stuff!!!)
Heres basicly what I found out:
8.8" Differentials (only with 4.6L engines)
Eaton LSD (Clutch Type) about $400
Auburn LSD (Cone Type) about $400
Either one installed About $600

9.75" Differential (Only with 5.4L engines)
Auburn Makes a LSD, About $450
Installed is about $750

Said that Eaton is working on releasing a LSD for the 9.75"


Not Bad Pricing! (also considering im keeping the stock 3.73 gear ratio)

I was originally interested in getting a Power Trax LSD, but they talked me out of it with their knowledge, called it a poor mans locker....

 

[pronstar]

Nice!
'
I'd prefer a mechanically-locking diff like an Auburn, as opposed the the Ford Racing unit that I have (clutch-type).

The clutch-types are old-school, and don't transmitt as much torque. They also wear out over time.

 

[curtisjackson]

I'm really getting confused for the team aftermarket? Is it really a standard term for parts of any Brand?