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Unread 08-25-2013, 08:36 AM   #1
UrbanWrangler93
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8.8 Trac-Lok, Clutch Pack, Clutch Shims?

Hi
I am in the process of gathering parts and rebuilding my rear 8.8 31 spline diff. The old diff had most of the teeth broken off one of the side gears and the clutch plates had some bad wear.. I have already ordered a new spider gear set and need help figuring out what clutch set I would need for my diff.

This is the gear set I have already ordered.
http://www.summitracing.com/parts/sag-85-2013

Here are two clutch kits I found for the 8.8. I just want to confirm that these are what I would need. If these are what I need, what kit do you guys recommend? I do not own Friction Modifier.

http://www.summitracing.com/search/p...k-included/yes

I have not searched up on how to install the clutch parts yet but I assume you just add or remove shims till the gear mesh seems right?

Any recommendations and tips would be great.

Here are a few pics of my axle

Broken spider gears
http://imageshack.us/photo/my-images/23/drrs.jpg/

http://imageshack.us/photo/my-images/27/bdrd.jpg/

http://imageshack.us/photo/my-images/560/47ba.jpg/

Thanks,
Jake

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Unread 08-25-2013, 11:38 AM   #2
Evildriver-3
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That is the wrong spider assembly, you might want to deal with a local driveline shop so you don't run into the wrong stuff.

You would need to remove the carrier from the housing, which you remove the cross pin, axles and then you remove the spiders and side gears and replace the broken clutches if there are any broken, depending what clutch kit you get will depend on the stacking behind each side gear, then there are tools to make everything go back together easier.
When you remove the carrier do not mix the side shims that come out from between the races and housing.

.
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Unread 08-25-2013, 11:59 AM   #3
UrbanWrangler93
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You're right.. I ordered the OPEN gear set instead of the posi... that sucks. I missed that part when ordering

Thanks for the explanation. I will try that.
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Unread 08-25-2013, 12:06 PM   #4
Anticanman
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You may want to consider swapping a mustang set instead.
Just a thought.
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Unread 08-25-2013, 12:34 PM   #5
UrbanWrangler93
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Thanks. I got store credit with summit so I will order the proper set.

Before I make the same mistake again, can you guys confirm this is the gear set I need?
http://www.summitracing.com/parts/yga-16106

Also what one of these clutch/shim kits should I order? The two sets look the same to me..?
http://www.summitracing.com/search/p...k-included/yes

The sooner I get this gear and clutch kit confirmed, the sooner I get to place my order. I appreciate the help. Thanks guys.

Last edited by UrbanWrangler93; 08-26-2013 at 03:25 AM..
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Unread 08-26-2013, 01:05 PM   #6
UrbanWrangler93
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Any help guys? This jeep is my DD after all and it would be great if I could order the parts today.
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Unread 08-26-2013, 01:11 PM   #7
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The gears look ok and you should be able to reuse some of the friction disks from the old axle to add to the new for a tighter LSD.
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Unread 08-26-2013, 02:10 PM   #8
UrbanWrangler93
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Great thanks. So I got the spider gear set figured out then.

Final question before I make my order.

Is this the friction disk set I need for my posi?
http://www.summitracing.com/parts/fm...00-b/overview/
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Unread 08-26-2013, 02:53 PM   #9
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That one looks fine.
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Unread 08-26-2013, 06:31 PM   #10
UrbanWrangler93
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Great. I appreciate the help. Thanks!
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Unread 08-26-2013, 07:34 PM   #11
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Good luck. The 8.8 is one of the best modifications I did to my jeep.
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Unread 08-26-2013, 07:35 PM   #12
UrbanWrangler93
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Alright it turns out the clutch/friction plate kit with the bottle of Friction Modifier is not allowed past the boarder.

Will this kit (without Friction Modifier) work in my axle?
http://www.summitracing.com/parts/fm...00-c/overview/

Would Friction Modifier be readily available in most parts shops?
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Unread 08-26-2013, 07:42 PM   #13
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It should be available in parts stores. The friction modifier.
I used the mustang clutch pack with the f150 retaining spring.
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Unread 08-26-2013, 07:43 PM   #14
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Most auto parts stores have 90 at gear oil with a friction modifier already added. Its called a limited slip mix or something.
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Unread 08-26-2013, 07:44 PM   #15
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I buy mine 5 gallons at a time

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