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Old 04-08-2009, 09:11 AM
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4 banger question

Hey guys I gotta question about putting bigger tires on a 97 tj 4 banger. will putting 33s on it cause any problems, like buring the clutch ect? (i'm putting a 1inch body lift on it and a 3.25inch rough counrty lift to.. i know its a cheap lift but im a student, so im not worried about rubbing)..
thanks guys

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Old 04-08-2009, 09:14 AM   #2
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With 33s the TJ will be sluggish because of the bigger tire diameter. If you like to go fast you´ll want to regear with this setup. For me it would be ok.. A TJ is no sports car..

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Old 04-08-2009, 09:39 AM
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when i bought a jeep i understood what i was buying... a brick on wheels... so ya speed isnt a problem.. i mainly care about ground clearance
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Old 04-08-2009, 10:41 AM   #4
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With the lifts your doing you'll be more than okay as far as rubbing goes. But Nicolas is right about the power loss. My 2.5 has 4:10's and I am running 32x11.50x15 BFG M/T's and it's a dog on the highway. It's does fine wheeling, but up hill on highways or into a head wind is rather frustrating some times. Going to larger tires won't effect your clutch. It will however put additional stess on your axles. I would not go any bigger than 33's, this assuming you are running D30 & D35 axles.
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Old 04-08-2009, 10:45 AM   #5
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Are you running 4:10 gears? What kind of driving will you be doing?...highway, around town, flat, hills, etc. I have a 4 banger with 2 inches of body lift and 2 inches of suspension lift running 32 x 11.50's with 4:10 gearing. Mine runs surprisingly well, even here in PA where we have a lot of hills. It's no powerhouse by any means, but it gets up to speed fairly quickly with the 32's. I don't often use 5th gear unless I am on the interstate and a good head-on wind and an incline sometimes requires me to downshift into 4th.

IMO I wouldn't go with any bigger tires than 32's unless I was planning to regear.

Let us know what you decide.
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Old 04-08-2009, 11:41 PM
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its my DD but on weekends i do some light off roading (mostly climbing ski hills and stuff... nothing to crazy) but thanks for your replies guys... and here is a rookie question lol... how much work gose into regearing?
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Old 04-09-2009, 12:30 AM   #7
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I am running 33's on a 97 4 cyl tj. I regeared to 4:88 and wish i had gone to 5:13. went from kinda breathless in hills with 30's to a real dog in hills. interstate is reasonable as long as you keep your speed up, but long hill will run it outta breath
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Old 04-09-2009, 12:46 AM   #8
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Not trivial to attempt, if you haven't done one.
I've rebuilt several diffs in brit sports cars and was going to my regear, but i really tweaked my shoulder and decided to have a pro do it. You will find that a good strong bearing puller or hydraulic press will come i handy. As well as dial indicators with mag mount. Can generally do without the special tools you will see in the manuals, just have to get creative at measuring. I believe i heard that many folks luck out and you can get by with reinstalling the same shim packs that were in each location.
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Old 04-09-2009, 03:13 AM   #9
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4 Banger= squirrel power= gutless
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Old 04-09-2009, 03:28 PM   #10
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Quote:
Originally Posted by jtalar View Post
4 Banger= squirrel power= gutless
On the highway, I agree.

I have 4.88's in my 2.5L turning 33x12.5's. I also have corner armor, aftermarket bumpers, winch, skids, etc... so it isn't exactly light either.

I found myself driving on the highway yesterday at 80mph. Surprised me! Long grades can wear it down to the point of downshifting to 4th or 3rd (if long enough. Short steep hills on the highway can really get ya too, but not so bad if you speed up beforehand.

City driving is just fine.

Offroad, I'll keep up with any of them and have a good downhill crawl with gearing and engine compression. I RARELY use my brakes offroad - no need.

Would I like an inline 6 4.0? Yeah, but for what I do offroad and the limited highway use it sees, my 2.5L does just fine.

I DO have upgraded shafts in the D35, along with lockers front and rear.
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Old 04-09-2009, 04:58 PM
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i also wish i had a 6 or 350 for that matter... but with the type of off roading and stuff i do.. i dont find it to hard to keep up. if i do get the gears done i wont do it my self....so just a quesstimit how much would that cost to get a pro to do it. and when i had my stock wee tires on ... i got a ticket for doin 155km so like 95mph.... i was shocked it couldnt even get going that fast
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Old 04-09-2009, 05:06 PM   #12
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It might cost 500 for thr front an the same for the back.
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Old 04-09-2009, 06:51 PM   #13
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I have the 4.0 but that is one of my concerns if I run 31's, will it slow my jeep down? Right now I have 235x75x15 BFG AT KO's and I doubt I would be allowed off road with those tires even though I have great traction with them.
I am going on vacation end of May and part of my plans are finding some trails here in MA. and testing the waters.

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