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Old 08-20-2012, 02:34 PM
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Who has 33"s on a 2.5?

I have been hearing mixed things about 33's on a 2.5. I have 31's right now and want to put on 33's without re-gearing since I am going to do an engine upgrade next year. I have people tell what it will be like with them on there, but I haven't heard from anyone who has them. So is there anyone who has a 2.5 as a DD with 33's on it? How is the mileage? How much lift are you running, and does it go too slow for the highway? What is the top speed? I know with my 31's it take everything to get it up to 70-75 on the highway. I am also lifted pretty high though which is why I ask what lift you have. Thanks in advance for any info you can offer.

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Old 08-20-2012, 02:38 PM   #2
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OverkillYJ, I'm getting ready to put on a 4" lift on mine with BFG 32" KO's. Most people on here are saying for 33's or bigger you need to regear to 4:56 or 4:88. You definitely have the right axel already though. That is next on my list.

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Old 08-20-2012, 02:46 PM   #3
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I am running 4" lift with 33/12.50/15 and it does ok. Just ok. Gears would help immensely. Top speed is about 65-70. 5th gear is useless all together.
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Old 08-20-2012, 02:47 PM   #4
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Btw I do have 2.5. I also have a 4.0 throttle body, as well as aftermarket intake.
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Old 08-20-2012, 03:13 PM
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Yeah, I am SOA and just had my springs repacked with an extra leaf which gave it an extra 2". So right now I am at 7.5"-8" of lift. Not sure how well that will go over with a 2.5 and 33" tires.
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Old 08-20-2012, 03:19 PM   #6
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I am a 2.5 TBI with 33s, it is now a four speed with an extra gear for downhill and a good wind at my back. Goes good enough for a weekend wheeler and offroad I spend most of my time in 4L. I would love to regear but the wallet is empty.
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Old 08-20-2012, 04:03 PM
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Yeah, I 4LO it 90% of the time offroad. Its the only way I can confidently take the super steep uphill trails. That wouldn't bother me. My 5th gear is already gone as well, that is what scares me about putting even bigger tires on it. This is, I know my next set of tires will be on it for a long time and will be the tires I have when I swap the engine.
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Old 08-20-2012, 04:13 PM   #8
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I'd say get gears then tires.
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Old 08-20-2012, 04:30 PM
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I dont need gears dude. You read the first part? I am dropping a V8 in it this next spring. 4.10 will be perfect with that and 33's as a daily driver. I just dont know if 33's on my jeep now would make it undriveable. Whatever I put on it now I will have for a while after the engine swap, that is why I am considering getting the tires this time instead of waiting until I have the V8 and need tires again.
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Complete rebuild axle/engine/everything swap in progress: Building stock width 44's with 302 from 01 Explorer. Motor has GT40p heads, Cobra Intake, and truck cam. Running A9L EEC IV stand alone engine from late 80's-90's Mustang GT. Big Bearing NP435 married to NP205.
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Old 08-20-2012, 05:43 PM   #10
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I have 33's on my 2.5 (auto though)... it's a slug, but driveable. If you need tires, I would recommend to go for the 33's. You will probably have to get used to driving slower on the freeway - like 55-65. I wish I could give better info, but I have only had it for a few days.

I am planning on re-gearing mine before I do any power mods... gears are supposed to make a HUGE difference with the 2.5 and 33"+ tires. I have the 8.8 rear with 4.88 gears in it already, just need to finish the fab work and get the gears for the front.

Can you post a photo of yours sitting that high with 31's? I am curious as to how it looks... I am at about 6" lift.
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Old 08-20-2012, 07:53 PM
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Originally Posted by Y-oh-Y-J View Post
I have 33's on my 2.5 (auto though)... it's a slug, but driveable. If you need tires, I would recommend to go for the 33's. You will probably have to get used to driving slower on the freeway - like 55-65. I wish I could give better info, but I have only had it for a few days.

I am planning on re-gearing mine before I do any power mods... gears are supposed to make a HUGE difference with the 2.5 and 33"+ tires. I have the 8.8 rear with 4.88 gears in it already, just need to finish the fab work and get the gears for the front.

Can you post a photo of yours sitting that high with 31's? I am curious as to how it looks... I am at about 6" lift.
This is the best I can do right now. Just Monstalined it yesterday. Flares are of right now too. I should say when the flares are on I can stuff my tires into them almost all the way. I have just enough room for 33" to flex all the way. I also just ripped out a 3" body lift. It was even higher.
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Old 08-20-2012, 08:01 PM   #12
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I just ordered 33 Goodyear MTR w/ Kevlar because a bunch of the local guys I jeep with swear by them. I have a 2.5 with no power mods and an ax-5. I'm sure it will be slow as hell but its not my DD. I'm going to drop a 5.3L LM7 in the future so 4.10 gears are great for that. YOu will suffer speed but if you're doing the V8 route be ready to change the rear axle. Dana 35 can only handle so much let alone old ass axle shafts. Best of luck. Post up the tires when you get them.
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Old 08-20-2012, 08:45 PM
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Originally Posted by CROSSFIT YJ
I just ordered 33 Goodyear MTR w/ Kevlar because a bunch of the local guys I jeep with swear by them. I have a 2.5 with no power mods and an ax-5. I'm sure it will be slow as hell but its not my DD. I'm going to drop a 5.3L LM7 in the future so 4.10 gears are great for that. YOu will suffer speed but if you're doing the V8 route be ready to change the rear axle. Dana 35 can only handle so much let alone old ass axle shafts. Best of luck. Post up the tires when you get them.
I got an 8.8 LSD.
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Old 08-20-2012, 09:55 PM   #14
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Who cares about top highway speed?. I am going w/33's next season cause I am tired of being the guy with the smallest tires, lol. I have power mods that make my squirrel cage do just fine at 8k feet and above. I do about 55mph on average on the highway in the mountains, cause I ain't in no hurry. I leave early to get there, and don't really want to come back. This is my weekend car, I will admit. My 2.5" gave me some good susp. lift, I believe all I will need is a 1 or 1.5" BL. Maybe regear, if I can't take it.
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Old 08-21-2012, 05:48 AM   #15
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im running 33s on a 2.5 5 speed,5th is like an over drive and i have to down shift to 4th to go up the steeper hills of eastern ky on the highway but it,s no huge problem.mpgs will def.drop though

and since your doing a v8 swap i say throw on the 33s and you will be happy that you did..
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Old 08-21-2012, 08:08 AM
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Originally Posted by BAP
im running 33s on a 2.5 5 speed,5th is like an over drive and i have to down shift to 4th to go up the steeper hills of eastern ky on the highway but it,s no huge problem.mpgs will def.drop though

and since your doing a v8 swap i say throw on the 33s and you will be happy that you did..
Will do. I made this thread to fugue out what to exxpect. Honestly 31's are pretty bad. That is why I wanted to hear how other people were with 33 before I made a decision. 33's it is. These tires don't have too much left, once they are toasty I will pick up a new set.
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Old 08-21-2012, 08:40 AM   #17
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I have 33s right now without regearing. It's not great, but I get by. I drive to daily. As long as you don't need to go over 55MPH and don't mind VERY slow starts, you're fine until you do your engine upgrade.
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Old 08-21-2012, 10:51 AM   #18
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If its only temporary what does it matter about having power to turn them?
So you'll have a 4 speed that's slugish and struggles on hills.

More to compare to after you have v8 power
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Old 08-21-2012, 10:58 AM   #19
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Originally Posted by OverkillYJ

Will do. I made this thread to fugue out what to exxpect. Honestly 31's are pretty bad. That is why I wanted to hear how other people were with 33 before I made a decision. 33's it is. These tires don't have too much left, once they are toasty I will pick up a new set.
If 31's are that bad, it sounds like you need the engine upgrade any way. I had no problems on 31's, hell I had full use of 5th gear. And that was before intake and tb.
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Old 08-21-2012, 11:22 AM
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I drive highway long distances. Other than that it is fine. You have to remember I got about 7"-8" of lift so that is a big part of it at highway speeds.
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Old 08-21-2012, 02:02 PM   #21
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All that does is make you taller. Does not affect your gearing. With 4" springs and 1.5" shackles and 33" tires mine still does alright. Been this way for last year and a half.
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Old 08-21-2012, 02:11 PM
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All that does is make you taller. Does not affect your gearing. With 4" springs and 1.5" shackles and 33" tires mine still does alright. Been this way for last year and a half.
The fact that it is not aerodynamic causes the extra problems from being so high. Once I get over 55 I feel the wind holding it back more and more as I try to speed up. Its not the gearing. If there was no air resistance it would go well over 100mph. You got 5.5" of lift, that is not as high. Mine was worst since it had a 3"body lift in it, but I pulled that out. A jeep on 4" springs going down the highway at 55 will burn less then someone going the same speed at 7"-8". BTW, I would have better height measurements, I just havent gotten around to measuring the rocker panels.

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