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Old 10-07-2010, 02:45 PM   #1
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Maximum tire size for a YJ/Which Lift? Still deciding :(

What's the maximum tire size a YJ can safely handle? I head 33's will put strain on the axles because the axles are only rated to safely hold 31's. I was looking to put a lift on my Jeep and think that a 4 inch lift with 33's would be nice but I will be doing highway traveling as well as town commuting and some off road. So do I buy a 4 inch lift and take the chance with 33's or a 2.5 inch lift and go 31's? Which will have a better and safer highway ride?

Thanks A Lot Everyone,
YJman

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Old 10-07-2010, 02:55 PM   #2
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You can run a 4" lift with 33's, you will notice a loss of some umph in it,it all depends on what gears you have. 5th gear will probably be useless for ya. You probably have a Dana 35 axle so 33 is the largest tire I would consider.

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Old 10-07-2010, 03:10 PM   #3
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My YJ formula I always use is SOA 5.5" and 33's.
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Old 10-07-2010, 04:09 PM   #4
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Old 10-07-2010, 04:56 PM   #5
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Oh okay so I think I'll stick with 31's. And I'll do a 2.5 inch lift with a half inch shackle lift? Because I'd like a 3 inch lift and greaseable shackles so this is the best combo I could think of.

I wish I could do SOA but I'm getting my license in about a month and a half and right after that I need to get a job. And I don't have the money to buy a slip yoke eliminator on top of all the stuff that I already need to buy lol.
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Old 10-07-2010, 04:58 PM   #6
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I don't use SYE's on my spring overs....never had a problem. If you have access to a welder you can do a SOA for about 500 bucks.
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Old 10-08-2010, 04:05 PM   #7
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You can run a 4" lift with 33's, you will notice a loss of some umph in it,it all depends on what gears you have. 5th gear will probably be useless for ya. You probably have a Dana 35 axle so 33 is the largest tire I would consider.

Now when you say 5th gear would be useless, what do you mean?

And I really would like an SOA but I'll be on the road mostly and don't really need an SOA. And some day in the future I plan to put a plow on my Jeep.
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Old 10-08-2010, 04:25 PM   #8
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On the road mostly is still way better with an SOA, the ride is 10 fold better than any aftermarket spring

What he means about 5th gear is when your increase tire size but not increase gear ratio, it takes alot more power to achieve the same speed, and virtually making 5th gear useless.
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Old 10-08-2010, 05:12 PM   #9
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So with an SOA you get like 5.5 inches of lift? I think I'll still do an SOA in the future though. I do really like how you don't need after market springs to achieve lift and to give you more ground clearance, but I don't even have a welder lol.

And okay thanks for explaining this. So with stock hearing, 31's would be good? How about 32s?
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Old 10-08-2010, 08:07 PM   #10
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Hmmm could be a problem....I hear they make a bolt on kit now

You can run the stock gears on 33's, its just gonna rob some power...what year and engine do you have?
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Old 10-08-2010, 08:19 PM   #11
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Oh they do?

I have a 92 YJ with the 4.0.
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Old 10-08-2010, 09:39 PM   #12
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Hmmm could be a problem....I hear they make a bolt on kit now

You can run the stock gears on 33's, its just gonna rob some power...what year and engine do you have?
Wait do you know where I can find one of those bolt on kits? And you said you don't use a SYE? What about a transfer case drop?

And what are the pros and cons of doing an SOA vs a regular lift?
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Old 10-08-2010, 10:26 PM   #13
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Look on eBay for the soa lift. It's a bolt on complete kit with everything you need for $480 plus $81 shipping
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Old 10-08-2010, 11:54 PM   #14
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Yes 1-1.5 inch box steel works just fine for a T-case drop
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Old 10-09-2010, 08:28 AM   #15
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Okay I'll take a look on ebay. I also found a kit on quadratec.

How do this transfer case drop look? I'd really feel safer with a 1.5" drop but I can't seem to find one

So I found a 1.25 inch drop:
Daystar 1.25 Inch Transfer Case Drop Kit 1987-04 Jeep YJ,TJ

And a 1 inch drop:
Rustys Offroad: Transfer Case Drop Kit (TJ 97-02/ YJ)

Which one do you think would be my best bet?

And Ibuildembig, do you have anymore pictures of your Jeep? I'd like to see what your Jeep looks like from the side with those 33's
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Old 10-09-2010, 09:02 AM   #16
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You can make a tcase drop with some steel from you local steeyard. I sold my jeep that was on 33's, but my brother in law has one and I will see what I can find for ya
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Old 10-09-2010, 10:02 AM   #17
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You can make a tcase drop with some steel from you local steeyard. I sold my jeep that was on 33's, but my brother in law has one and I will see what I can find for ya
Thats a good idea. My school's shop class that I'm in has a bunch of metal that I can use.

And oh okay thanks a lot.
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Old 10-09-2010, 10:43 PM   #18
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Running 35's SOA lift and 4.44 gears - no problems. I get to around 65mph in 4th gear and travel at 70mph on flat roads in 5th gear - 2.5 engine at 22 miles per gallon.

Hills do slow me down, but I just shift down and my rig does the job.

2 inch body lift.
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Old 10-10-2010, 09:52 AM   #19
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4.44 gears?
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Old 10-10-2010, 10:53 AM   #20
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im not much of a YJ guy but on tj's 33's and 4 inch lift are as safe as can be.
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Old 10-10-2010, 08:27 PM   #21
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Oops Ibuildembig: It's 4.88 gears. Good catch.
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Old 10-11-2010, 02:28 AM   #22
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Running 35's SOA lift and 4.44 gears - no problems. I get to around 65mph in 4th gear and travel at 70mph on flat roads in 5th gear - 2.5 engine at 22 miles per gallon.

Hills do slow me down, but I just shift down and my rig does the job.

2 inch body lift.
how do you get 22mpg??? i can't seem to get over 16mpg....i have cleaned out the fuel system, throttle body etc
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Old 10-11-2010, 09:46 PM   #23
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Alright sounds good. How's the highway ride with 33's? Does the Jeep tend to wander left and right a lot or does it track straight?
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Old 10-11-2010, 10:46 PM   #24
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I could drive down one of the worst washboarded roads out here with an open cup of coffee and never spill a drop But honestly its gonna depend on how good your stock springs are
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Old 10-12-2010, 09:05 PM   #25
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I could drive down one of the worst washboarded roads out here with an open cup of coffee and never spill a drop But honestly its gonna depend on how good your stock springs are
Sweet my stock springs in front are almost flat lol. The rear ones still have some life in them but the fronts are basically shot. Should I buy new springs all around or leave them?
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Old 10-12-2010, 10:54 PM   #26
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Most of the stock springs appear to be flat, I would try um and see how it goes
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Old 10-14-2010, 02:10 PM   #27
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Okay. Because in front, my suspension has about a half inch of travel then the bump stops hit each other. But with the SOA it may not be so bad hopefully..
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Old 10-14-2010, 02:33 PM   #28
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That's pretty normal honestly...I wouldn't sweat it
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Old 10-14-2010, 04:59 PM   #29
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Okay sounds good Thanks man
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Old 10-14-2010, 05:05 PM   #30
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how do you get 22mpg??? i can't seem to get over 16mpg....i have cleaned out the fuel system, throttle body etc
I get about 20mpg, 22 sounds high but def can be done especially with a 2.5

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