is it possible to have 36'' tires with a 4 banger plz help this is my first jeep thnk - Jeep Wrangler Forum
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Old 04-28-2006, 12:28 PM   #1
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is it possible to have 36'' tires with a 4 banger plz help this is my first jeep thnk

howdie folks, i recently picked up a 1997 wrangler for about 3000 bucs it has 82000 miles on it and its in great condition. But it has a 4 banger, so im wondering if there is anything i can do to kinda beef the motor up so i can but some 36'' tres on it ?thanks

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Old 04-28-2006, 12:50 PM   #2
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gears are your friend! You need around 5.38s for 36s. You won't get any power equivalent enough to regearing. 5.38s also means you need more axles. I ran 37s on 4.88s with the 4 banger and I hated it!

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Old 04-28-2006, 04:52 PM   #3
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With your Dana 30 front axle the highest you can go is 4.88 numerical gearing. If you have the Dana 35 rear axle the highest you can go I believe is 4.56 numerically. However if you have this rear axle then running 36's is a dangerous thing anyway. But like Clifford said gearing is your friend on this one.
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Old 04-30-2006, 12:35 PM   #4
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I wouldn't run any bigger than 33" tires with the axles that come with the 2.5L four-banger. First, the deepest gearing that can be installed in those axles is 4.88 which for the four-banger, is the ideal ratio for 33" tires. Not only would your power be really bad with 36" tires, it's doubtful the axles would hold up long with that size tire.
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Old 04-30-2006, 06:27 PM   #5
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If you go with the 4.88"s, I would also recommend that you go with a Tera-low conversion on your transfer case. That will give you a 4:1 ratio in four low. Lots of possibilities.
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Old 04-30-2006, 07:40 PM   #6
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Originally Posted by jeepsrus
If you go with the 4.88"s, I would also recommend that you go with a Tera-low conversion on your transfer case. That will give you a 4:1 ratio in four low. Lots of possibilities.
A 4:1 combined with 4.88 gearing, 33" tires, and a Dana 35c rear axle is s sure-fire recipe for a busted axleshaft.
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Old 04-30-2006, 10:18 PM   #7
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A 4:1 combined with 4.88 gearing, 33" tires, and a Dana 35c rear axle is s sure-fire recipe for a busted axleshaft.
Actually, he wants to run 36" tires, and that is probably the limit for the D35 anyway, or pushing the limit. I have a friend that runs stock d30,35 on his YJ, and runs 35" tires, with a Deep V Klune, he has not busted a axle yet. He did have some problems with the U-joint on the rear drive shaft, but has since decreased the angle on that. A lot of it has to do with the way you wheel, or how smart you wheel. His final crawl ratio is over 200:1 in his lowest gear.
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Old 05-01-2006, 12:11 AM   #8
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36's is more than pushing the limit on a D35....thats just stupid. You are going to need to upgrade at least the rear axle. D44 or 8.8. And gear them very low.
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Old 05-01-2006, 12:24 AM   #9
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The thing to remember is that the Dana 35 in this case is behind a 4, not a 6; you can usually go up another 2" in tire size and have a good combo (well, as good as a 33"/D35/4.0 combo gets anyways) in a 4 vs. the 6, however be carefull with that 4:1 in any case. Lots of guys can run a D30/44 combo with 37"s and all kinds of cool crawlbox combos with the 4 and never have any issues - so the stress is easier here (yeah I know it all comes down to the driver, but the bottom line is with a bigger engine you're more likely to snap that sucker)
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Old 05-01-2006, 01:26 AM   #10
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Originally Posted by JeepCrawler98
The thing to remember is that the Dana 35 in this case is behind a 4, not a 6; you can usually go up another 2" in tire size and have a good combo (well, as good as a 33"/D35/4.0 combo gets anyways) in a 4 vs. the 6, however be carefull with that 4:1 in any case. Lots of guys can run a D30/44 combo with 37"s and all kinds of cool crawlbox combos with the 4 and never have any issues - so the stress is easier here (yeah I know it all comes down to the driver, but the bottom line is with a bigger engine you're more likely to snap that sucker)
The combination of 4:1, 4.88 axle gears, and even 33" tires... let alone 36"... is a death sentence for a Dana 35c. 2.5L or not. Yes the 2.5L does give more leeway but that particular combination of gear ratios and tire size is still more than a Dana 35c can take, even when driven by the diminutive 2.5L.
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Old 05-01-2006, 01:50 PM   #11
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Also sometimes you have to get on the throttle more with the 2.5L. Which could lead to bouncing the Jeep a little bit. And as soon as that thing bounces with that combo....toasted!! I have heard of people snapped D35's making U-turns on the street with 33's.
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Old 05-01-2006, 02:08 PM   #12
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I don't quiet buy that - yes you have to be more on edge with the smaller engine to keep er running, but it does ok; you will spin the tires before you bog that thing so far down that you're flying the clutch a million miles an hour. When you do get things in a bind to where gas is needed to torque out of an obstacle, if you're not paying attention or feeling the trail the 2.5l will just stall or bog down (producing less power along the way); the 4.0 will just keep churning as it carries MUCH more momentum with it. While the 4.0 is smoother (I've wheeled/driven both myself) and easier to drive, it will always put more stress on the drivetrain; for this exact same reason a 502 powered Jeep needs 2.5 tonners when running bigger tires (or at least built 60s) while a 4 cylinder Jeep/buggy can get away with MUCH less. The lighter the engine and/or platform, the lighter the drivetrain can to be; for this reason the car manufacturers generally throw lighter axles, trannies, t-cases, lower spline counts, etc. behind smaller engines - engineers are not stupid, they build things to hold up to standard use.

If you were to get a 4.0 up to speed and instantly stop the tires on all corners, then do the same with the 2.5 - the 4.0 will exert MUCH more force on everything involved in getting the power transferred and then some.

As for the bouncing thing - that's usually a factor of traction and suspension design. When you're in a spot where you lose traction and get into the 'bounce' scenario, not only is the 4 banger plenty capable of just keeping the tires spinning smoothly in 4lo (JUST like the 6 cyl), but it would actually be a HAIR (really minutely, considering I think it's like a 70lb difference between the engines) more likely to climb out because of its lighter weight - the system as a whole doesn't have to overcome those 70 pounds of inertia to get going. The only time my SE has ever started to bounce (in all the times I've lost traction, be it slickrock, gravel, loose soil, mud, you name it) is when my rear CA bushings were getting worn out (happened twice now in the lifetime of the vehicle) - other than that, the tires just.... spin.

post-edit: What makes me worry about the proposed setup is the 4:1 - I would say with 35"s and a 2.5L and 4.88's you could try the D35c and see if it works for you (whereas I would say for the love of god don't even try with the 4.0 with the usual 4.56's that go for 35"s). While 4.88's with 36" is less than ideal, it'd be around 33"s with stock gearing (4.10) as far as driveability goes - shitty, but perfectly manageable; but that 4:1 will up the torque coming into that axle 147% - that's a considerable increase.
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Old 05-06-2006, 12:01 PM   #13
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Hi guys,

I understood ZERO of what you guys were saying. I was going to ask a silimar question.
I have a stock 4 cylinder '97. I can get a great deal on some Outlaw II wheels with 32 inch tires.

Will they fit?

Can't I just replace the tires with "normal" tires and still sport the Outlaw II's?
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Old 05-06-2006, 02:00 PM   #14
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yes you can...if you like sounds of tires rubbing...a 2 inch body lift should clear it or a Budget boost lift...im a YJ guy so i could be wrong but i know i sold 32" BFG A/T to one of my friends and he had to body lift it to get them to fit
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dont waste your money on junk lifts, save a few extra pennies and get something good.
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Old 05-06-2006, 10:34 PM   #15
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Thanks, Superman.
I think I'll just use the "normal" tires instead of buying a lift kit.
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Old 05-08-2006, 04:11 PM   #16
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I would say that you might not need to have a lift for those tires. I ran 31x10.50x15 tires on my stock wheels for a year. Yeah, they rubbed a litte bit on the control arms at full turn, but nothing I couldn't deal with. And no lift on it either. 32's should have enough room to run in there. What size are the wheels and what back spacing are they? Also what size are the tires? 32x11.50x15? 32x9.50x15? It's all a matter of what exactly you have.

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