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View Poll Results: Which axle/gear option is the most effective but cost effective for a non-welder?
Upgrade the gears in the existing D30/D35 to 4.10 myself. 2 11.76%
Find a D30/D35 from a 2.5 YJ and swap it myself. 5 29.41%
Find TJ axles from yard and pay someone to install 0 0%
Pay someone to install Ford 8.8 from JY and D30 w/4.10 from JY 9 52.94%
Scrap the upgrade and save for a 2011 Rubicon! 1 5.88%
Voters: 17. You may not vote on this poll

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Unread 05-07-2010, 01:26 PM   #1
photoboy74
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1988 YJ Wrangler 
 
Join Date: Apr 2009
Location: Wichita
Posts: 62
Axle or Gear Upgrade

So I'm trying to plan my upgrade into 33s on my 88 and I'm not sure which way to go. I know I need at least 4.10 gears and I've seen a lot of people state you need a Ford 8.8, but I may only wheel 4 times a year.

Background Information
----------------------------
1. Don't have a welder or access to a welder. Nor have I ever welded.
2. Never done an axle swap.
3. Never done a gear upgrade.
4. I swapped the BA10 for a NV3550 w/Np231 last winter.
5. U joints and shafts are still stock.
6. Lift is currently 2.5" with extra 1" from TJ flares. Planning a 1" BL for remainder. (Shackles later if articulation needs improvement)

So I need to take a poll to figure out what is the best option for me. Please add your to help a fellow Jeeper out.

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Unread 05-07-2010, 01:29 PM   #2
Louie4
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I run 4.10's in my stock axles and I know the risk of snapping an axle shaft which is why I carry spares. I do plan on building a Ford 8.8 because of the added beef. But its a roll of the dice if you break the Dana 35. You might do it on the road or on the trail.
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Unread 05-07-2010, 01:42 PM   #3
mntbkrguy
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I say, D. non of the above

I am in a similar boat, 33's 3.07 gears I contemplated getting just new gears, or new axles I decided 8.8 and new gears in the front. But.... everyone's circumstances are different. I got a jeep with an SOA already done and for $50 I got a set of stock TJ shafts for the front (eliminating the vacuum). It would be a waste of $$ to get a whole new front axle because it needs to be modified to fit the YJ anyway so just getting a gear set and have someone instal it is a better option.

As for the rear,
That is a big DIY if you are not really mechanically inclined but... my local club has members (like me) more than willing to help with such projects.

Gears are something you can do yourself but even experienced mechanics tell me to go to someone that does it a lot because it is one of those practice makes perfect things and if your off by the slightest margin it can be a bad deal.

just my $.02
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Unread 05-07-2010, 01:47 PM   #4
photoboy74
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I'm a shade tree mechanic. I did the tranny/t-case swap myself and I've rebuilt a couple motors in the past. I've got no problem doing the labor of a swap, but I just don't have the welder.

Personally, I was thinking of just digging around for a set of 4.10 YJ axles and swapping them out. Then I would add a locker and TJ axles later, but I wanted to check. I've seen people state that the 8.8 can cost over 1k for parts and installation, when I could get a YJ axle for 300 a piece and install it on my own.
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Unread 05-07-2010, 01:51 PM   #5
jbolty
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For now I would find a pair of 4.10 axles from a 4 cyl and carry spare rear shafts with you along with the stuff to change them. If you really only go out 4x a year that will do you. Easy on the gas pedal.
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Unread 05-07-2010, 02:04 PM   #6
Louie4
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I say try to snag some 4 cylinder YJ axles with the 4.10's. I re-geared mine myself and it was a job but I was actually successful. I'm a shade tree mechanic too, worked at a shop and my family always had crappy junk cars that needed fixing so I picked up a lot of knowledge. If you do go the DIY route do your research and get all the tools necessary. I read all kinds of articles and installation instructions before I tackled the job and they helped but a lot of started to click when I actually dug in and did it.
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Unread 05-07-2010, 02:55 PM   #7
remmons
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I will be facing this decision in the near future. I currently have 3.7's on mine with stock wheels and tires. I already know that this Jeep will be doggy once I finally get it on the road. I have a set of 4.10 geared 3/4 ton chevy axles at my house with wheels and tires. I have been contemplating on narrowing these and installing them into my YJ.
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Unread 05-12-2010, 02:41 PM   #8
photoboy74
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Thanks for all the info. I'm definitely leaning towards the 4.10 YJ axle swaps and carrying a set of spare axle shafts on me. The 3.07s definitely suck, but with all the mods I've done so far I can still do 70 down the road on 31s.
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