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Old 06-03-2013, 08:28 PM   #1
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95 yj 8.8 rear end swap

I recently got my 95 yj with a roaring rear end. figured since I gotta replace it might as well go with a stronger one. I read a couple of the other posts abut still have a couple of questions concerning the swap. I'm gonna be getting the 8.8 soon and was wondering if I need a longer drive shaft or different pinion gears or anything. Or if I could just run the stock drive shaft straight to the 8.8.

thanks,
Travis

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Old 06-03-2013, 08:55 PM   #2
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You wont know untill you install it weither you will need a longer or shorter shaft. This will help with the mate the YJ shaft to the 8.8 flange. IRON ROCK OFF ROAD: Ford 8.8 Flange Adapter for 1310 Size Joint (Spicer# 2-2-1379) If your drive line uses a 1330 joint this cross over joint will allow you to install a 1330 joint on to the 1310 flange bracket.http://www.ironrockoffroad.com/Merch...gory_Code=F88S

As for gears that depends on your front end and the 8.8 you get. Both ends need to match or you cant use 4WD. So if you have 3.07 up front and the 8.8 has 3.73 you will need to regear one of the axles.

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Old 06-04-2013, 10:53 AM   #3
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Okay sounds good. Thanks a lot
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Old 06-04-2013, 04:17 PM   #4
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When you get the 8.8, grab the adapter from the Explorer drive shaft. Depending on your setup, I would look for one with the 4.11 L.S. gears. If you have a 4 cyl, you won't have to change the front gears. I did the 8.8, SYE and new driveshafts / front end all at once. Depends on your budget.
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Old 06-04-2013, 10:28 PM   #5
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I took a look at my front pumpkin and on the tag it says 4.10 but stock specs for a 95 yj say it comes with the dana 35 which i think has the 3.05's? I don't know if the guy i got it from did a axle swap but the 4wd works so I'm guessing they are both 4.10 gears up front and back. Now I'm stuck between finding another dana 44 with 4.10's or getting the 8.8 and regearing it. I'm still new to the jeep and mechanics of everything so I may not be 100% right on everything.
I appreciate all the info though
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Old 06-05-2013, 01:27 AM   #6
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I know my 95 2.5l had 4.11 gears before I swapped them out so its probably correct. And if you find an axle with 4.10s you should be ok. That .01 difference you won't notice nor should it affect anything.
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Old 06-05-2013, 12:16 PM   #7
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If you have a 2.5l you have 4.10 gears in your stock axles
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Old 06-05-2013, 10:17 PM   #8
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Okay, I have Dana 35's with 4.10's then. So if I get a rear axle that has 4.11 then I won't have problems in 4wd or anything? And also would you guys recommend getting a 8.8 or finding another dana35 with 4.10's?
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Old 06-05-2013, 10:41 PM   #9
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Depends on your budge, tire size, and how you use your jeep. Finding a D35 with 4.10 can be cheap but hard to come by. You also can find an 8.8 with 4.10's. It will get costly if you have to regear an axle if you cant do it your self. Also its common with to be .01 off when doing 4.10 gears it wont affect anything in 4WD. My old powerwagon was 4.09 up front and 4.10 in the rear.
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Old 06-06-2013, 07:43 AM   #10
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Okay cool. I can probably find a 4wd explorer at the junkyard and get the rear end for about 100 bucks. but when I put it in I'm going to mount the leaf springs up top to give it a bit of a lift. So with that I'm pretty sure I'm going to have to get a longer drive shaft right?

Also I don't plan on going bigger than 34 or 35 goodrich AT maybe 12.5 wide. I plan on getting spacers too if that makes a difference. Would 4.10's run 35x12.5's with out added strain to the motor?
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Old 06-06-2013, 09:15 AM   #11
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You'll have to get a longer driveshaft, make or get some time of setup to help prevent axle wrap. Also if you do SOA (spring over the axle) you will have to do it to the front as well. Or you will have a really weird looking Jeep with about 5" extra lift in the rear.
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Old 06-06-2013, 09:34 AM   #12
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Yeah, I plan on doin SOA on front and back but my budget might only let me do the rear at first since I have to get another rear end. But the SOA gives about 5 inches?
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Old 06-06-2013, 09:44 AM   #13
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I am SOA with a 4cyl , 8.8, and 33's. I wouldnt go bigger without a regear. I am 410 and its driveable on the highway, but my friends slow down up hill for me. Lol

I also wouldnt get an 8.8 without 410 + lsd
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Old 06-06-2013, 09:46 AM   #14
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Lol alright. What did the SOA give you in lift size? Do you still have the dana 35 up front?
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Old 06-06-2013, 10:03 AM   #15
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Its a Dana 30 up front. I locked mine with a Spartan. It will handles 33's with no problems at all.

SOA is one of the most complicated ways to lift a YJ. You end up with the best leaf spring setup possible, but it will cost you a lot more time and money. I got about 7"-7.5" of lift since I had a full length leaf added to all my springs and had them re arched.

I also install a high steer kit which cost me about $500 on its own, welded a traction bar and crossmember from scratch, and also spent all the time required setting the angles on my axles, installing SYE, etc...

I also swapped in an AX15 since I have a 4cyl it came with an AX5. AX5 wont handle larger than 31's for long on the highway, 5th gear will turn into nuetral. 35's would totally destroy an AX5 even at slower speeds if you were in 4LOW beating it on a trail for example.

As far as the flange for the 8.8, you would not crossover to a 1310 from a 1330. If you crossover you go bigger, not smaller. You would get a 1350 flange. Also a 1350 SYE yoke, and try to run a strait shaft instead of a CV. Some people do not use CV shafts with SOA. If I kill another CV shaft I will be trying this as well.
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Old 06-06-2013, 10:09 AM   #16
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So this is an SOA at about +7" with 33's. I also used 1/2" lift shackles in the front to level it out a bit since the tube is thicker on an 8.8. You do not need 35's for SOA. I would rub if I put them on there.
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Old 06-06-2013, 10:10 AM   #17
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Okay, I'll keep all that in mind. Hope mine doesn't turn out to cost me more than I'm hoping. Thanks!
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Old 06-06-2013, 10:12 AM   #18
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I have longer shackles I don't know how much longer though they came on when I got the jeep. I probably won't go bigger than 33's.
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Old 06-06-2013, 10:15 AM   #19
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I have 32x11.5 timberlane At's on it now and i rub turning sharp. The transmission was rebuilt and has about 500 miles on it and seems to handle the 32's fine. Would I be okay running 32x12.5 goodrich AT's?
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Old 06-06-2013, 10:44 AM   #20
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It will cost at minimum $1000 to do an SOA if you find the parts cheap in certain places and make some parts yourself.

I am guessing you have an automatic trans? It doesn't say in your profile.
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Old 06-06-2013, 11:57 AM   #21
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Nah I got a 5 speed 4 cyl. 1000$? Is that for front and rear combined? Cause right now I'm really only concerned about getting a new rear end before mine gives out and I figured while I'm replacing it might as well do a SOA
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Old 06-06-2013, 12:11 PM   #22
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Yeah if you have a 5 speed 4cyl then rebuilding an AX5 is a waste of time if going over 31" tires. Swap an AX15 in if you want to offroad for real. The $1000 is to do SOA lift, that is just the lift. Perches, Driveshaft, SYE, Steering Solution, Traction bar/crossmember, brake lines. I feel like I am forgetting a couple of things too.

You dont need a new front. If you need a rear then yeah get an 8.8 too.
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Old 06-06-2013, 10:20 PM   #23
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I plan on doing all the labor myself and with the help of a friend. I'm getting the driveshaft from Jeepers Den hopefully once i get the rearened up under and see how long I need then getting the rest of the parts from the same place. I guess I underestimated the process. I figiured all I had to do was take the 8.8 put it up under there get a longer shaft and mount the spring leaf brackets on top of the axle. Clearly I got a lot more work to do. I know me and my friend will be able to do it he's a huge car guy. Could this all be in done in a day? Cause this jeep is also my daily driver.
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Old 06-06-2013, 10:49 PM   #24
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Quote:
Originally Posted by Wrangler Rider View Post
I plan on doing all the labor myself and with the help of a friend. I'm getting the driveshaft from Jeepers Den hopefully once i get the rearened up under and see how long I need then getting the rest of the parts from the same place. I guess I underestimated the process. I figiured all I had to do was take the 8.8 put it up under there get a longer shaft and mount the spring leaf brackets on top of the axle. Clearly I got a lot more work to do. I know me and my friend will be able to do it he's a huge car guy. Could this all be in done in a day? Cause this jeep is also my daily driver.
ROFL! I'm not sure if I'm the only one here thinking this but one day? I wouldn't say it's impossible but Murphy's law will always prevail! And another thing, you plan on driving the Jeep with SOA in the rear and SUA in the front? Well I wish I could find a picture to show you how silly this will look. Let alone that I would advise against driving any vehicle with a 5" (if you currently have a lift it will be more) of lift in the rear and stock height (refer to previous bubble comment) in the front. I suggest you get everything to do it all at once and spend all your free time doing the swap.
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Old 06-07-2013, 08:17 AM   #25
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I would wait to do it all at once but my concern is that my rear end could give out soon and I don't wanna be stuck without a vehicle. I might just wait honestly. I wasn't thinking the SOA would give that much of a lift. I got about 750 saved up but gotta start making my payments in mid july sos by then I should have enough to do both front and back.
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Old 06-07-2013, 09:43 AM   #26
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The front is going to cost you. If I was you I would just get a 4" lift kit. Then you dont have to high steer, or crossover steer. You could also get front 6" lift springs and then do SOA in the back with a 1/2" shackle lift to level it out. That was actually my original plan to avoid spending the cash on the steering in the begining when I got my 8.8, but the prick that sold me my front 6" springs actually had 4" springs. By the time I realized it the rear was done and I had to finish it. It worked out for the better though. Glad the front is SOA and high steered. The high steer makes a huge difference and is actually something you will hardly ever see on modded Jeeps. I smacked my front diff on a stump two weeks ago that would have taken out my tie rod if it was in the stock location.

Either way though you go a bigger problem. Once you are up in the air with that jeep regardless of how you do it, and you are trying to go 60 down the highway with those 32" tires that AX5 is going to kill itself. I did not put on largwer tires when I did my SOA, and I can tell you I lost a lot of speed and power on the highway just from the height difference. I did SOA after I swapped in an AX15 so I my transmission could handle it, but there is no way that AX5 will take it for long in 5th gear.
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Old 06-07-2013, 10:43 PM   #27
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Alright, I might just go with like 31x12.5's. I'm running 32x11.5's right now and the AX5 seems to handle it okay. The transmission was rebuilt about 500 miles ago maybe running the 32's is why it needed to be rebuilt. But I might just do that SOA in the back then get leaf springs up front for now and run smaller tires. Eventually I want to do SOA all around and convert it to a AX15. But that's down the road once I get all the little stuff fixed. I know I have bigger shackles up front so maybe there big enough to make it look somewhat level with a 6" leaf spring. For the leaf spring I think I have to just do a 180 with the axle and that will allow everything to hook up right. How much is the leaf springs gonna cost me
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Old 06-07-2013, 10:49 PM   #28
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NO, SOA will give you about 5.5" on an 8.8 in the rear. So it would be +1/2" shackles in the rear to bring that up level with 6" lift springs in the front by themselves. 31's will kill an AX5 too. Mine was low miles and died with 31's. I rebuilt and killed it again with the same tires. Your biggest problem is the AX5.

Ideally you would just get a 4.0 AX15 or NV3550 combo and drop that in, then lift so your driveshaft are done right the first time. Either way, if you want to go bigger and keep 5th gear you have to swap the trans. Some people dont care though and just drive it with 4th on the highway.
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Old 06-07-2013, 11:03 PM   #29
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Okay. I would go for the AX15 but I need to replace my rear end. and while I got it all apart I figured I just go ahead and do the SOA in the back and then just do an add a leaf up front to level out the lift. I need new tires soon so I don't wanna get 30's or smaller with the AX5 then get the AX15 and want bigger tires. My major concern is swapping the rear end then getting a lift. I might be able to run these tires untill I have money to get the AX15. I know this gonna be a dumb question but AX15 is gonna be pretty expensive right?
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Old 06-07-2013, 11:09 PM   #30
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Jeep AX-15 Rebuilt Transmission Trans 5 speed

First and only post in my area. Would that be a good price for a rebuilt?

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