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Old 02-24-2012, 06:34 AM   #1
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Picking up my Ford 8.8 Rear End this weekend

Found a guy in South Florida with a front-wrecked '98 Explorer. Had 81k on the truck when it was wrecked.

Axle looks to be in good shape from what I saw in the photos. For $200, even if it takes some work, it's probably a good deal so I'm looking to pick it up tomorrow.

That said, I had some questions.

#1 - It has 3.73 gears with limited slip in it now. I'm looking to upgrade the gears on both it and my front axle to at least 4.88 but am considering 5.13. Is the 5.13 really that much better in a 4 cylinder wrangler? Other than the gears themselves, what other parts will need to be replaced inside the pumpkin?

#2 - When I re-gear, I'll have to re-gear the front axle too. It's a stock axle (I think), so that's a Dana 30, right?

#3 - Does anyone have a parts list of things I'll need to make this work under my YJ? I assume I'll be using the same suspension parts I already have in connecting the rear leafs to it. Are there any additional adapters I'll need? Custom drive shaft? Any vendor I should contact about this?

#4 - I imagine this would be the time to upgrade to lockers as well. Is it a good idea to put lockers in the back axle but not the front? or should I wait until I can afford lockers all the way around? What's everyone's preferred locker make/model and how easy are they to lock?

#5 - Knowing I have Eagle Alloy 028 aftermarket wheels with a 4 inch backspace running 33x12.50/15s, will that give me any clearance issues with the wheels I have now rubbing on the calipers or other parts of the hub?

#6 - Anything else I should know before buying this and proceeding?

Denis

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1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.
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Old 02-24-2012, 06:51 AM   #2
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Sounds like a great deal!

#1 I would not go over 4.88 because I believe thats the limit for the d30 front unless your gonna change that too. If your running 33's 4.88's will be fine for sure even with the 4 banger. You will need the gear set and a full setup kit, shims, seals, and bearings.

#2 Yes, and Yes but I believe the d30 is limited at 4.88 gears.

#3 You will need to adapt the e brake lines which i believe MORE makes a kit or you might be able to piece somethign together. You'll need new spring perches and lower shock mounts. You will also need an adapter fromt he u joint to the ford flat flange. These parts are out there but I am unsure where to get them. i have seen threads posted and when I do mine I'll check it out unless you post where you get yours. I have a local race car company that makes brackets for cheap so I was gonna get my spring perches and shock mounts.

#4 Yes, you could do lockers now if you wish. ARB is gonna be the best really. Or you could use an auto lokaer like a detroit or spartan etc. You might just want to get the swap done and look into lockers later. Unless your going with an arb or e locker becuse those need to be installed when the gears are setup but they cost big$$$$. A lunchbox loker can be installed anytime.

#5 You should be ok. But not 100% on that.

#6 Not sure. Til I do mine I wouldn't know for sure but I would expect it.<LOL! Good luck and keep us posted!

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Old 02-24-2012, 08:38 AM   #3
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1. It would be better, but as YamJam mentioned, you're limited to 4.88 in the front.

2. Yes, otherwise things go crunch when you put it in four wheel drive. Stock gears on the 4-banger is 4.10.

3. YamJam is good on that one.

4. With a LSD, a lunchbox locker is not an option. You need an open carrier for that. Thus, if you want to run lunchbox you need a new carrier designed for an open diff or a locker that replaces the carrier (i.e. ARB). Nothing wrong with locking the rear but not the front.

5. Clearance is fine.

6. Yes, you'll want a heavy duty diff cover. The stock one is thin as tin foil.
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Old 02-24-2012, 10:07 AM   #4
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I picked up my 8.8 kit from here for a good price and had pretty much everything need to install the 8.8. I did pick up some rear shock relocation brackets from MORE though. kNOw Where 2Jeep Complete Ford 8.8 Install Kit For Wrangler TJ/LJ
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Old 02-24-2012, 10:13 AM   #5
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bs250r - That kit looks like it's for TJ/LJ, so I assume it's for mounting with coils. Looks like the YJ version is even less money:

kNOw Where 2Jeep Complete Ford 8.8 Install Kit For '91-'95 Wrangler YJ

It does ask two questions I'm not sure how to answer.

#1 - Spring Under Axle Ubolt Flip Kit - Is this needed? What does it do? I run standard SUA. Will this make a difference?

#2 - Is the braided vs currie rubber brake line kit worth the extra $10?
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1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.
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Old 02-25-2012, 09:40 AM   #6
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#1 It moves flips the u bolts over. Basically putting the nuts on top and the smooth round parts on bottom. It can gain you some clearence and keeps you from getting hung up on the u bolt nuts and plates. It is not needed but nice depending on cost.
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Old 02-26-2012, 01:52 PM   #7
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i got 8.8 with 355s laying around sounds good i didnt know it would work
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Old 02-26-2012, 04:10 PM   #8
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I bought an 8.8 to use under my TJ, but never installed it. Now I plan on using it under my YJ. I'll probably regear it and install it sometime next winter.
I'm looking forward to following your install so I have a better idea on what to look out for when doing mine.

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