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Old 12-01-2007, 11:25 PM   #1
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Calling all 2.4L TJ's

Hey fella's just ran across this site and it seems pretty cool. But in any event i've had my 04 SE, TJ since June of 06, and im planning on putting some bigger tires on it. Right now its bone stock with the 2.4L, NV1500 5speed, D30 (4.10), D35 (4.11), P225/75/15's on 15x7 ECCO's. For now ill just use my little SE, as a DD for work. Im kind'a (green) when it comes to knowing what i want for tire size, or which gears to go with for a DD. I do plan to wheel my jeep after i get her paid for, but for now ill just shoot for the best combo that will make it run like stock. The 2.4L does better than most people give it credit for, and i really dont mind the way it runs, and gives me not one bit of trouble. So if youve got a 2.4L, and went with bigger meat and gears, please let me know how it worked for you.

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Old 12-01-2007, 11:38 PM   #2
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I just have 31X11.50's on mine stock gears with a 2" Budget boost. works ok for now but I do want to get a 4.5" lift with 4:88's in the rear and run 33's maybe 35's one day

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Old 12-02-2007, 03:27 AM   #3
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Yeah i thought about 31's, but with a 2.4L and 4.11's, it might run worse than it does now. Or maybe i could just slap some 4.88's in there with 31's to keep my power for the hills.
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Old 12-02-2007, 07:14 AM   #4
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there ya go...
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Old 12-02-2007, 11:47 AM   #5
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my brother had a 4 banger with 5speed and 4.10s d30, d35 and 31-10.50-15. that thing was an animal on the trail. 4.88s with 31s will be way too low you will be pegging the limiter all the time. i run 32-11.50-15 with 3.07s and a 3speed auto. i do fine on the trail. im not going to chang gears till i get 35s
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Old 12-02-2007, 01:31 PM   #6
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I have 33's and 3.73 gears with a 3spd auto. Its a bit sluggish, so I'm upgrading to 4.88 gears
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Old 12-02-2007, 10:31 PM   #7
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I have an 2.4L 05 SE (6 speed)....I am currently running 31's with 4.88 gears. To be completely honest, I wish I would have gone with 4.56 (if running 31's). The only problem I've ran into is that I can't go over 60 MPH without the engine screaming at me (RPMs too high). I plan on a 3" lift in the future with 33's....that should help a little. Until then, I'll just have to stick it out.
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Old 12-02-2007, 10:34 PM   #8
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tobycat1: How does the Flowmaster 50 delta sound with the 4 banger? I've been thinking about getting one myself.
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Old 12-02-2007, 11:05 PM   #9
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ThanX (jeepohana80) for the input, thats just the info i was looking for
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Old 12-02-2007, 11:33 PM   #10
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haha jeep. i got the flowmaster 40 series and it sounds pretty good. people can tell when im coming.

sorry street i dunno what 4.88 or 4.10 and that stuff means and i have no clue what i have in mine but mine is a 2.4L 4cyl
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Old 12-03-2007, 12:55 AM   #11
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tobycat1: How does the Flowmaster 50 delta sound with the 4 banger? I've been thinking about getting one myself.
Sounds good, not one bit "ricey"
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Old 12-03-2007, 08:51 AM   #12
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ok im lost... what is teh difference between the 2.4 and the 2.5?
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Old 12-03-2007, 10:41 AM   #13
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Looks to be about .1 liters to me
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Old 12-03-2007, 11:36 PM   #14
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Looks to be about .1 liters to me
Yea but thats about 3 hamsters.....
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Old 12-04-2007, 12:03 AM   #15
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Sounds good, not one bit "ricey"
Thanks for the info....I'm gonna ask Santa to put one under the tree.
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Old 12-04-2007, 12:33 AM   #16
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Sounds like a plan. I asked for a locker
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Old 12-04-2007, 04:38 PM   #17
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I run 30x9.50 BFG AT/KO's on one of my 97's, 2.5L 5 speed, works well and still gets 20mpg on the hiway, 18 around town. Stock height but I'm putting a 2"BB on in january.
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Old 12-04-2007, 07:37 PM   #18
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ok im lost... what is teh difference between the 2.4 and the 2.5?
I believe the 2.5L is an AMC motor, and the 2.4L is a Mopar motor and cranks about 25 hp more than the 2.5L
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Old 12-04-2007, 07:48 PM   #19
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I know a lot of the (I6ers) snub there nosess at the 4 poppers even more so the 2.4L, but ive really grown to enjoy my little 2.4L, that i plan on keeping it for a long time, and then when its all paid for. I plan to get another TJ or maybee a YJ with the I6, and have the 2.4L for work and the I6 for play.
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Old 12-05-2007, 10:43 AM   #20
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Yea, I have no complaints on the 4 bangers, easier to work on, more room in the engine bay and gets 20mpg vs the 16mpg that most I know with the 4.0L TJ's get.
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Old 12-05-2007, 07:29 PM   #21
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ok im lost... what is teh difference between the 2.4 and the 2.5?
the 2.5 is a pushrod motor. a simpler type of engine the way i like them its like a short 4.0. the 2.4 is dual over head cam a higher reving motor and more power but more complex
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Old 12-18-2007, 05:49 PM   #22
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I am running 31x10.50 on my 2000 Wrangler. It has a 2.5L with a 5 speed, and stock 4.11 gears. It runs strong. I pull around 18 mpg on the highway, and something on the order of 16 mpg in town.
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Old 12-18-2007, 09:27 PM   #23
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I went from 225X75X15X7's to 235X75X15X7's. Going to go 2 inches up and 30X9.5X15X7. I noticed at 65mph and having to climb on freeways I lost power and had to downshift into 4th. The 4 bangers are great for fuel mpg and 4X4 like little efficient tanks. I don't want to regear anything.

Putting 24's on a pinto in my opinion is like trying to make a Rock-Crawler out of a well built 4 cyl. You start with something else.
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Old 08-24-2013, 01:42 AM   #24
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im rolling 31X10.50 r15 with the 4.56 gears. i have an auto tranny (in theory the worst combo possible) i can reach 75 mph and drive 18mpg. i put 13k a year.
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Old 08-24-2013, 07:28 AM   #25
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Yeah i thought about 31's, but with a 2.4L and 4.11's, it might run worse than it does now. Or maybe i could just slap some 4.88's in there with 31's to keep my power for the hills.
I run 31's on an 04 4 banger and since I no longer look to be the fastest man on earth I find it works fine. Also, changing gears is not just a remove and replace so if you do not know how to do it you should have it done and at a cost of about 1200-1500 make the first decision your last.
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Old 08-24-2013, 11:14 AM   #26
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ok im lost... what is teh difference between the 2.4 and the 2.5?
To Walkeraviator:

The 2.5L was the 4 banger used for many years. It is like a Mini Me of the 4.0L engine.

The 2.4L is a Mopar block that is completely different and get more power and speed. But it still did not do a great job. DC abandoned 4cylinder Wranglers with the advent of the JK in 2007.

The 2.4L was only ever used on TJs from 2003 through 2006, so getting one that has been remanufactured is difficult and way more expensive than the result is worth.

To the OP:

My 2003 SE 2.4L threw a rod on May 11 and the price from the dealership for a reman installed was $6,500! I raised another $1,500 and got me a 2003 Sport 4.0L instead.

The SE is paid for (so is the Sport) and is sitting in the driveway, deader than a doornail for now.

The motor mounts for for the 2.4L (maybe the 2.5L, too?) are welded to the frame. I believe that the 2003 4.0L ones are bolted on.

Regardless, we plan on pulling the dead 2.4L and cutting off the motor mounts. Then she will get either a 4.0L or a Chevy 350 small block V8.

The jeep motor will still require as much part replacement at the Chevy, so why not? The replacement stuff for the jeep motor will be cheaper, though, as I can get all of it brand new from WeRMopar.com as stock replacement stuff, like the computer and radiator and main wiring harness.

The Chevy will require that all this stuff be purchased from aftermarket tuners. The stuff will be great, but costly.

So I guess it depends on which block we come across first when we have the money. (The V8 *does* present a very fun picture of what it could do, though! Very interesting idea!)

My 2.4L ran great for nine years. But I used it for my DD on a daily 120 roundtrip commute for the past five. To keep up on the Interstate I usually had the pedal to the floor and frequently had it in 4th on top of that.

It was disappointingly weak. I fooled myself into thinking it was "okay" by running it to death. The thrown rod was my fault as I went through a long period of partial employment and could not afford to have her serviced properly. She started to run hot two years ago and we continued to run her flat out on the highway. I am 100% certain that my rod broke due to extended overheating. My fault completely...

Had I not mossed so much general service for that time and had taken more time to get to work and had been willing to let everyone pass me on the freeway I might still be chugging around in my beloved SE.

I ran 31x10.5s with 4.11 gears and it was okay. But 4.53 would have been better. The next size up would have been great, probably.

I ran no lift at all. I was about to put the RE BB on it, though. It would not have changed anything at all save driveline angles, and the BB never seems to cause vibrations, so it would have been fine.

I had planned to go to 32x11.5 tires on rims with backspacing a little more aggressive looking than stock. At that time I was going to upgrade to a Dana 44 and regear with a better ratio. But I never got to that point.

There is zero problems with running 32x11.5 tires on a stock TJ, no matter what you have heard. There is NO RUBBING when it is fully stuffed nor when you are at full lock with stock rims. If there is any problem at all it can be *very* slight rubbing at full steering lock, and the five minute washer fix does the trick. (I ran a friend's 32x11.5s on stock Gambler rims for three weeks to try them out on my stock SE and all was great.)

The 2.4L engine is way underrated in the Jeep world, where bigger always seems to mean better, so the opposite *must* be true. Right? (HA!)

They are actually better in the big rocks than the much heavier 4.0L if you are an experienced rock driver. The auto is particularly good at rocks. I could get a 2.4L auto through a lot more than with the 4.0L 5 speed that I tried out in California one summer years ago. I was shocked at how good the 4 banger was, honestly.

You have no reason to be defensive, protective or in need of any sort of explanation when discussing your rig. It is just as much a "real" jeep as any 4.0L rig. I loved mine, but the 4.0L *IS* more fun for me, after all those years of that higher pitched engine sound and having to push her up hills and such. The 4.0L just goes.

And my dead SE will be reborn with a lot more power. Some day. I hope...
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Old 08-24-2013, 11:59 AM   #27
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I have an 05 2.4 with 6spd and 3.73 gears. Ran 31's from almost the day I bought it new in Jan '06 with a 2" lift that actually netted almost 2.75" until last summer when I got a friends 33's for a great deal. Like another poster said, I no longer need to the fastest guy around, so it's been fine. I live in a rural area and have no major highways around so I rarely have a need to go over 70mph. On trails I keep up with 4 liters and JKs without issues. Fuel economy is the bonus. Nobody in our group slams the 4 cyl anymore since I'm the only guy that gets consistently better mileage, 18-20mpg easily. I just might lag back a bit on the run to the trail...

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