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Old 05-16-2012, 12:39 PM   #1
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4.0 with 3.73 or 2.5L with 4.56

Sold my last TJ about two weeks ago because I wanted to start again with a rig. Finally zeroing in on what I want.

I can get an early year TJ running a 2.5L with the 4.56 regear for around $4500 or a 4.0L with the stock 3.73 gearing for around $5400.

Same miles, condition, etc.

I have some left over parts from my last build so I only need some skids and a small lift to get it where I want it for now. Less on the rig means more on parts.

Realistically I am looking for someone who has run a larger tire with a 4 banger and had the regear to tell me if I will be able to run the Jeep at highway speeds on occasion. I know what the "theory" is but I would like to hear from some of you all.

My last TJ was a 4.0L and ran 33's with stock gearing, so I know the I6 and what it can do, just curious about the 2.5L.

Thanks!

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Old 05-16-2012, 12:41 PM   #2
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stay with the I6. that 2.5 will get old after a while. its realllly gutless for the most part...which is every part. lol

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Old 05-16-2012, 01:11 PM   #3
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The 4L is far more valuable than the 4.56 gearing
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Old 05-16-2012, 01:13 PM   #4
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what rear axle does the 4.0L have?
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Old 05-16-2012, 01:20 PM   #5
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Rear on the one I am looking at is a d35, but if I can get a tow package with a d44 I will go with that. I would rather the discussion didn't get into breaking axles, and axle shafts if that's where you were headed. I can booger around with that when I get there.

2.5L also runs the 35 rear. Just debating if saving a grand is worth the "gutless"ness of the 2.5L since this won't be a DD - and long trips would belong to the tow slut.

Thanks again for the input
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Old 05-16-2012, 01:20 PM   #6
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I have a 2.5 liter

I've been running 33's for about three years with the 4.10 gears. Listen to the other guys, buy the 4.0 liter. I live at 7,000 feet elevation and the four banger gets about 14-15 miles per gallon and is horribly slow. It's my daily driver. I actually enjoy it when doing technical stuff in the rocks but anything else like mud or snow and I really wish I had the six cylinder. My plan is to upgrade the axles, lift it a few more inches, drive the four banger until it blows up then swap a bigger engine. To sum up, buy the I6.
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Old 05-16-2012, 01:23 PM   #7
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4.0 hands down. How many people have you ever heard say I wish I had the 2.5L? I have heard a lot of people say I wish I had the 4.0L.
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Old 05-16-2012, 01:28 PM   #8
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Haha. I know no one wishes they ran a 2.5L. Just curious if I would want crash it...slowly...into a wall after finding out it has no power. I will focus on the 4.0L I was spoiled by a 4.7 in my last TJ. Gearing be-damned!
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Old 05-16-2012, 01:31 PM   #9
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Haha. I know no one wishes they ran a 2.5L. Just curious if I would want crash it...slowly...into a wall after finding out it has no power. I will focus on the 4.0L I was spoiled by a 4.7 in my last TJ. Gearing be-damned!
If you enjoy going 45 mph in third gear while climbing any hill longer than half a mile, buy the four banger.
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Old 05-16-2012, 01:34 PM   #10
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My 4L is slow, I can't imagine driving a 2.5L.
Good luck with your decision.
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Old 05-16-2012, 01:51 PM   #11
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You could go the homo route with 2.5l. I wish I was somewhere near to see how you wheel that monster?
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Old 05-16-2012, 01:56 PM   #12
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You could go the homo route with 2.5l. I wish I was somewhere near to see how you wheel that monster?

So was that a question? And who said I was looking for a monster to wheel?



Advise appreciated everyone. Will stick to keeping my CL searches to the 4.0L and wait for a smokin' deal. Thanks -
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Old 05-16-2012, 01:57 PM   #13
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Why would you buy a jeep if you were not going to wheel. But a 2.5l tj would be better than a silly blue xj.
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Old 05-16-2012, 02:00 PM   #14
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Why would you buy a jeep if you were not going to wheel. But a 2.5l tj would be better than a silly blue xj.


Oh...hey Jeff. haha you turd.


Also - you make a strong point about the XJ thing. Really tough to ratchet strap my axle to the frame in the middle of trail 5 WHEN THERE IS NO DAMN FRAME.
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Old 05-16-2012, 02:04 PM   #15
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hahaha, a frame in an xj... that is like buying a jeep with a 2.5l. It almost has a motor. Take your time, find the right jeep. Otherwise I will be back working on your jeep. You remember how that ended last time.
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Old 05-16-2012, 02:12 PM   #16
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hahaha, a frame in an xj... that is like buying a jeep with a 2.5l. It almost has a motor. Take your time, find the right jeep. Otherwise I will be back working on your jeep. You remember how that ended last time.

Poor thing never had a chance

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Old 05-16-2012, 02:13 PM   #17
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Yes, you can run the 2.5 at hwy speeds with the regear.
Yes, I do own a 2.5 with 32" bias TSl's and geared.
Yes, I am satisfied with it
No, I would never buy another 2.5.

Offer 5000 for the 4.0, if they take it, buy it and regear later if needed.

This is all based on the assumption that the condition/mileage is comparable between the 2. If one is worse than the other, buy the nicer one. Mine does fine offroad and can run hwy speeds, but 5th gear is useless and dont drive the hwy when the wind is blowing. If you do, 4th will be useless.
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Old 05-17-2012, 08:45 AM   #18
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Considering he has 180 mile drive to go wheeling, and the last 40 miles is basically up a mountain, he would be better off with the 4.0. I am not sure, but it seems that some people do not respond to text messages before 6am. Those lazy bums. I have seen what a 2.5l on 33's does in the big rocks. We know a guy who does that, and we have seen his engine just give up. Maybe with a 4:1 low, but the stock tcase is not too happy on the upper level trails.


Ryan, you know we are going to talk you into the blacks and reds.
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Old 05-17-2012, 09:03 AM   #19
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They are essentially equal off road if gearing has been addressed, however, I wouldn't want the 2.5 unless it was geared at 4.88. The good news is that with the 3.73's you beat the carrier break in the front so you don't have to worry about that if you regear.
My Lj on 33's and 3.73's is not much different than my 2.5 yj on 33's with 4.10's in 4lo. It is very different on the hwy though.
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Old 05-17-2012, 09:10 AM   #20
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With the driving I will do I have focused more on the 4.0. I can save some cash on the 2.5 but yrflu is right - I know I am just going to end up wishing I had the 4.0 when I drop more cash on the 4:1 and have to give the rig a break on the way up to the park.

As for blacks and reds, been there, done that when I had the XJ. I am good for a while with fun lil' blues and driving home.
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Old 05-17-2012, 09:52 AM   #21
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The last trip we went on, we did a red on accident. I was only aiming for one or two blacks, and we took the red exit. You can expect it to happen if you follow me. My sense of direction is just bad enough to get me stuck.

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