Author Topic: Ultimate 88 Kit  (Read 317 times)

Offline NickMaida

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Ultimate 88 Kit
« on: September 06, 2017, 09:57:52 PM »
So I'm in the process of building a Ford 8.8 for my TJ. I'm on 35s and have an ARB. I'm just wondering if anyone has any thoughts/experience with the Ultimate 88 from Yukon or the old Superior Super 88 kit. You get 4340 chromoly shafts, larger set20 Ford 9" bearings, and subsequently you don't need c-clips. And as a bonus you get an extra 1" on each side which means I don't need spacers. The only problem I see is that you can no longer use stock shafts as spares.
Besides price, is it worth it? Will I just be making the ring & pinion my weak point? Does anyone even carry spares for their 8.8 on 35s?
And no, I'm not interested in a D60.  :razz:
'97 TJ 4.0 - 35s

Offline JeepinMaxx

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Re: Ultimate 88 Kit
« Reply #1 on: September 06, 2017, 10:30:05 PM »
I've heard the stock 8.8 is as strong as a stock D44 - it's all about spline count and spare axles...  In my experience - D44 rear axles are more common for spares since the TJ Rubicon's used them too
99TJ Tummy Tuck and SYE, Front D30 with alloy shafts, Detroit locker 4.56, Rear D44, ARB locker 4.56.  Detoursusa.com Rear bumper, Superwinch EP9000 Front Cage



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Online Gorilla_Skater

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Re: Ultimate 88 Kit
« Reply #2 on: September 06, 2017, 10:44:50 PM »
I've got an 8.8 all stock. I do carry spare axles.

I dread the thought of having to change one of those with having to take the cover off and get the c clips off. I switched to a lube locker to make that process easier.

For that reason and all the pros you listed, I have been considering the Super 88 kit.

The only negatives are the non stock shafts and I've read the bearing set up isn't the strongest for side loads we put on then off road.
1993 YJ  6" lift on 35" Goodyear MTR's, 8.8 rear w/ Spartan, Dana 30 w/ Lockrite & 4.10's
1999 Dodge Ram 2500 8.0L V10 Tow Rig

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Offline XJRV-Maki

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Re: Ultimate 88 Kit
« Reply #3 on: September 06, 2017, 11:20:36 PM »
I beat on an 8.8 with Q's and a mini spool for more than 5 years, and a lock rite for 5 years before that. The tubes were welded otherwise stock. Only had to replace 1 axle shaft due to a bent flange. The lock rite wore out but the 8.8's a pretty burly axle as is.

Offline Space Shuttle Commander

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Re: Ultimate 88 Kit
« Reply #4 on: September 07, 2017, 07:36:41 AM »
I would personally run the 8.8 with stock axles and c clips.

spares are easy to come by, break a custom one in the middle of no where and your SOL

the 8.8 has disc breaks, if the c clip lets go the axle wont go sliding out

Sometimes I get to drive Becca's Jeep

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Offline sedge1080

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Re: Ultimate 88 Kit
« Reply #5 on: September 07, 2017, 09:00:49 AM »
I have seen a guy on 36" Iroks get pissed because he couldn't break his Super 88...  With that said I have wheeled with a bunch of people that run the 8.8, only thing I have seen break was the u joint flange.

Run it stock, upgrade when needed.   Although building it once is always a nice if money allows   

depending on which 8.8 you have the Explorer 8.8 are 31 spline and Disk, not all are 31 or disk.
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Online Gorilla_Skater

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Re: Ultimate 88 Kit
« Reply #6 on: September 07, 2017, 10:31:46 AM »
95+ have disc brakes.


1993 YJ  6" lift on 35" Goodyear MTR's, 8.8 rear w/ Spartan, Dana 30 w/ Lockrite & 4.10's
1999 Dodge Ram 2500 8.0L V10 Tow Rig

1N73LL1G3NC3 15 7H3 4B1L17Y 70 4D4P7 70 CH4NG3 ~573PH3N H4WK1NG

Offline NickMaida

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Re: Ultimate 88 Kit
« Reply #7 on: September 07, 2017, 11:01:41 AM »
Yeah mine has the 31 spline and disks.
Some goods points. It definitely seems like few people have issues with 8.8 axle shafts. But the idea of just overbuilding it from the start is enticing. Hmm. Decisions.


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'97 TJ 4.0 - 35s

Offline Broken99TJ

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Re: Ultimate 88 Kit
« Reply #8 on: September 07, 2017, 12:43:49 PM »
The stock 8.8 is the only thing on BrokenXJ that did't break.

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Re: Ultimate 88 Kit
« Reply #9 on: September 07, 2017, 12:48:24 PM »
From this post: http://www.wranglerforum.com/f210/are-you-considering-the-popular-ford-8-8-swap-92569.html


Warn tested the 3 axle shafts and found the 8.8 to be strongest:

F8.8= 6,500 (lb. ft.)
D44= 4,600-5,000 (lb. ft.)
D35C= 4,000-4,300 (lb. ft.)

-------------------------------
COT: Continuous output torque rating
MOT: Maximum output torque rating

(Numbers from January edition of Fourwheeler, page 60.)
Dana 35 rear axle COT: 870 MOT: 3480
Dana 44 rear axle COT: 1100 MOT: 4460
Ford 8.8 28spline COT: 1250 MOT: 4600
Ford 8.8 31spline COT: 1360 MOT: 5100
Dana60 semifloat COT: 1500 MOT: 5500]
1993 YJ  6" lift on 35" Goodyear MTR's, 8.8 rear w/ Spartan, Dana 30 w/ Lockrite & 4.10's
1999 Dodge Ram 2500 8.0L V10 Tow Rig

1N73LL1G3NC3 15 7H3 4B1L17Y 70 4D4P7 70 CH4NG3 ~573PH3N H4WK1NG

Offline bigdaddymack51

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Re: Ultimate 88 Kit
« Reply #10 on: September 09, 2017, 06:16:54 AM »
Dont use an 8.8 from a Ranger ! Smaller tubes and axle shafts , less spline.    Explorer is 31 spline .    The axle shafts can be broken , but it wont happen by itself ! I have used the "Airetec" truss kit on 4/5 8.8s for TJs . Every part is laser cut and perfect fit . Tab -A- goes into slot -B- ,You just have to be able to weld it together  FjR68

Offline NickMaida

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Re: Ultimate 88 Kit
« Reply #11 on: September 13, 2017, 10:54:14 AM »
Thanks guys for the input. I decided against the ultimate 88 kit mostly because I want to keep my options open for running stock shafts. I don't trailer my jeep and therefore would rather just carry spares.
But for those interested, what started this was seeing this Amazon warehouse deal on the kit for $333. I've had good and bad luck with warehouse deals (them sending the wrong part, things missing, etc) but overall I've saved hundreds by using them. I just keep an eye on them and have gotten most of my brake rotors/pads for less than $10 each.
So maybe someone can use it.
https://smile.amazon.com/gp/offer-listing/B0078U9CT0/ref=dp_olp_all_mbc?ie=UTF8&condition=all&coliid=I1MXDG5N3XMPV&colid=3IB9PA5S12PN8
'97 TJ 4.0 - 35s