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Old 06-23-2012, 01:26 PM   #1
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More Power!!

Hi all

I am a proud own of a 2004 Jeep Wrangler Sahara, with a STR6 4.0L engine.
But like everyone else, I want more power.
My problem is I mainly; use my jeep for long summer road trips, I'm getting a bit tired of having to change down from fifth gear when halfway up a hill on a mountainous road.
My question is, What is the best and most affordable way to increase the power of torques in my motor, to overcome the constant changing down of gears when riding on mountainous roads.
I have considered the Turbo option, but have not yet come across a turbo kit that is complete and most importantly affordable.
I have also considered a supercharger, but once again can't seem to come across one that is affordable and complete.

Any body got suggestions on the above?

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Old 06-23-2012, 03:41 PM   #2
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gears. if your running anything larger than i would say 33's and still on stock gears your not doing yourself any favors. some where around the 4.56 to 4.88 rang will cover just about anything up to 37's for closer to stock performance. as far as more power just remember that everything power wise has its pro's and its con's. you sound like a fairly new jeep owner so do some research read what others have done and learn from that. but i would start with re gearing as it is the most affordable.

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Old 06-23-2012, 06:03 PM   #3
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More power and cheap can not be used in the same sentence unless you are fairly skilled with auto mechanics and can weld.... Both of your options are the most expensive ways to make more power....

Viper5 is pretty on the money when it comes to gears.... Let us know what size tires you have, and what gears you are running.... If you don't know your ratio look on the back cover of the rear axle, there should be a small tag on one of the bolts with the gear ration on it...also what mountain roads are you on?.? And how much gear do you have in your jeep?? Also remember, 5th gear is an overdrive gear so it's not going to get you up the Rockies, or even some mountains in upstate NY or PA without downshifting....
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Old 06-23-2012, 08:50 PM   #4
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Stickers. Lots of them
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Old 06-24-2012, 03:45 AM   #5
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I'm running Firestone's Destination A/T 245/75R15C tires.
I had a good look for the plate on the rear axle, but can't seem to locate it. However, after going through the books, I found a specs page which indicates the ratios of each gear, they are as follows:
1st gear: (1) 4.02
2nd gear: (1) 2.32
3rd gear: (1) 1.40
4rth gear: (1) 1.00
5th gear: (1) 0.78
Final drive axel ration: (1) 3.07

I live in South Africa, and let me tell you, there are some beautiful mountain passes that I enjoy riding. I bought the vehicle brand new and am sorry to say, I've hardly used it.
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Old 06-24-2012, 11:59 AM   #6
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Quote:
Originally Posted by Clutch plate View Post
I'm running Firestone's Destination A/T 245/75R15C tires.
I had a good look for the plate on the rear axle, but can't seem to locate it. However, after going through the books, I found a specs page which indicates the ratios of each gear, they are as follows:
1st gear: (1) 4.02
2nd gear: (1) 2.32
3rd gear: (1) 1.40
4rth gear: (1) 1.00
5th gear: (1) 0.78
Final drive axel ration: (1) 3.07

I live in South Africa, and let me tell you, there are some beautiful mountain passes that I enjoy riding. I bought the vehicle brand new and am sorry to say, I've hardly used it.
Look, well if I'm reading that correctly you have 3.07 gears which are killing you in the power department.... As Viper5 said before and I am saying now your best bet is to regear the jeep.... Not sure if you need to go as radical as 4.56 or 4.88 but it all depends on what size tire you plan on running in the future... If your going to stay with what you have then 3.73's or 4.10's should be sufficient. I have stock 3.73's with a 31" tall tire and except for long highway climbs I'm usually able to hold speed without downshifting. I hope this helps.
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Old 06-24-2012, 02:00 PM   #7
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4.10 axle gears are what that transmission+tire size combination actually wants. 3.07 is silly and is the source of your frustrations.

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