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Old January 29th, 2008, 04:16 PM   #1
badazzamc
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Default 8.8 question????

I have a 99 xj with 29 spline 8.25 so here is the question I see a lot of 8.8's with disk brakes and lsd for a good price. So would it be worth swapping the 8.25 for a 8.8? How do they compare in strength? Is the width close? It seems a lot cheaper to go this rout rather than buying a locker for a 8.25 since my selection is very limited. Any thoughts on this would be great. Thanks
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Old January 29th, 2008, 04:27 PM   #2
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I did that swap and thought it was well worth it. I think the 8.8 was 5/8'' narrower than the 8.25. The one thing I really liked about it was it was a flat flange yoke, instead of U-joint straps. I kept busting those 1/4'' bolts on that pinion yoke.
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Old January 29th, 2008, 04:42 PM   #3
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To me it's worht the extra.

Larger ring gear.

More slection of ratio's. I wanted a 4.88 and the 8.25 only goes up to 4.56.

2 more splines.I wanted a non c-clip axle with chromo shafts and I can do that with the 8.8 and not the 8.25. I'll also add a little more width to the back.

Rear disc brakes are far better than the drums on the 8.25. Have you priced out how much it is to convert a 8.25 to disc.

I'm doing away with the lower shock mounts that hang down and snag shit. With the T&T U-bolt elems.
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Old January 29th, 2008, 05:41 PM   #4
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what are you doing about the driveshaft, since the 8.8 has a flange?
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Old January 29th, 2008, 07:50 PM   #5
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you get one of these:
http://www.amazon.com/MORE-221379-Yo.../dp/B000FQ1WHY

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Old January 29th, 2008, 08:11 PM   #6
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ok thanks I figured there was something like that I just didnt know what it was called.
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Old January 29th, 2008, 08:14 PM   #7
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Hey trav, i have one, it's for a fullsize, but would probably work.

Free too
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Old January 29th, 2008, 08:34 PM   #8
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Quote:
Originally Posted by ddeadserious View Post
Quote:
Originally Posted by Mongo View Post
source for 8.8 flange

bigger u-joint (1310) 2-2-1369
smaller u-joint 2-2-1379

Weller Truck Parts
Grand Rapids
800-872-6697

Website wont do you any good just call and ask for sales.
$12.41 for 2-2-1369, the other should be close. + shipping.
Way cheaper than the rip off at MORE. Only thing I would buy to swap it in from them is the parking brake cables.
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Old January 29th, 2008, 08:49 PM   #9
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could someone suggest how a dummy like me can determine if I have the bigger or smaller u joint?

I have a tom woods CV shaft, i am assuming i have the bigger u joints. but I have no clue really.
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Old January 29th, 2008, 08:53 PM   #10
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Quote:
Originally Posted by UP_ROKTOY View Post
could someone suggest how a dummy like me can determine if I have the bigger or smaller u joint?

I have a tom woods CV shaft, i am assuming i have the bigger u joints. but I have no clue really.


Cap Dia Width Series

1-1/8" 3-1/4" 1310
1-1/8" 3-5/8" 1330
1-3/16" 3-5/8" 1350
1-3/16" 4-3/16" 1410
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Old January 29th, 2008, 09:17 PM   #11
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Quote:
Originally Posted by Rocky View Post
Cap Dia Width Series

1-1/8" 3-1/4" 1310
1-1/8" 3-5/8" 1330
1-3/16" 3-5/8" 1350
1-3/16" 4-3/16" 1410
Thank you.
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Old January 29th, 2008, 09:38 PM   #12
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Quote:
Originally Posted by fsumotorhead View Post
Hey trav, i have one, it's for a fullsize, but would probably work.

Free too
Unfortunately it'll only work if he has a matching fullsize front axle. The fullsize axles are much wider and have a 5 on 5.5 bolt pattern. It's the Explorer axle that matches the Dana 30.
--Pete
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Old January 29th, 2008, 10:16 PM   #13
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I meant the flange adapter!
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Old January 29th, 2008, 10:35 PM   #14
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Oh, well then it'll bolt to any 8.8 just fine of course. You'll just need to measure for the U-joint.
--Pete
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Old January 30th, 2008, 06:58 AM   #15
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So, when getting an 8.8 from the junk yard, we should try to get the drive shaft (or atleast the rear adaptor) as well??

I would think we might want the rear brake line and emergency cables as well??
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Old January 30th, 2008, 01:51 PM   #16
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Quote:
Originally Posted by SHARPMACHINE View Post
So, when getting an 8.8 from the junk yard, we should try to get the drive shaft (or atleast the rear adaptor) as well??

I would think we might want the rear brake line and emergency cables as well??
All depends on you application. Exploders are 1330 u-joints. You could get a 1310/1330 combo joint though.

I would not reuse the brake lines for safety reasons. I bought a set of braided SS lines.

The emergency cables are more than likely to short.
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Old January 30th, 2008, 01:54 PM   #17
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rocks where did you get your lines and how much did they run you?
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Old January 30th, 2008, 01:59 PM   #18
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To add to what Rocky said, most Jeeps run a 1310 (I think Aerostars and rangers have that size flange adapter, but I'm not 100%). Be careful when hunting for flange adapters under Aeros, rangers, mustangs, Crown vics etc, that you're looking at an 8.8 and not the smaller 7.5 axle (or whatever number designation it is).
The rear rubber brake line is only $15 brand new so it's not a big deal to save yourself some time and cut it. Then you don't have to worry if it's good or not. Most Explorer axles I've seen needed new hard lines. For E-brake cables you might be able to use your current ones and do as the owner of the Jeep pictured below did. He just wrapped the cable around the E-brake lever and secured it with a cable clamp.
--Pete

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Old January 30th, 2008, 02:01 PM   #19
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Quote:
Originally Posted by UP_ROKTOY View Post
rocks where did you get your lines and how much did they run you?
Summit racing. They weren't cheap.

RUS-641291 Fittings, Brake, Steel, Nickel Plated, Male -3 AN to Female 3/ 8 in.x 24-Thread, Pair
$15.95

RUS-657022 Brake Line, Braided Stainless Steel Hose, 10mm Banjo to Straight -3 AN Female, 12 in. Long, Each
$26.95

Polyperformance has a set to but they are only 9" long. The plus side is they are cheaper.





I also ordered a SS ARB line kit, no POS blue plastic here. 12 foot long with both fittings.

RUS-634520 Brake Hydraulic Line; Air Locker Line Kit; Braided Stainless Steel; 12 ft.; w/ -3 Coupling Nuts On Both Ends
$67.99

Last edited by Rocky; January 30th, 2008 at 02:05 PM.
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Old February 1st, 2008, 10:19 AM   #20
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I got my adapter from Unlimited offroad Centers in Fenton Michigan yesterday.

Thanks guys.

FYI they have a couple on hand and in stock.

$25.
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