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Old 09-09-2013, 07:01 AM   #1
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Hill pulling power

Hey guys, I'm a new "used" jeep owner here. I am kinda confused about the amount of power my jeep has, when going uphill I lose about 10mph's, is this normal? Or what can I do to increase my horsepower? It is a V6 Wrangler, 5speed, running 33x 12.5 R15 tires, I have installed new plugs. I towed a camper this weekend for the first time and had to shift to 3rd gear to get up hills and basically run in 4th gear for 2 hours just to get home. Any advice would be great!!!!! Thanks

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Old 09-09-2013, 12:08 PM   #2
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What gears are you running in your rear?

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Old 09-09-2013, 11:21 PM   #3
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I really don't know how to answer that, I'm not that mechanically inclined....
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Old 09-10-2013, 12:06 AM   #4
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First off its an inline 6 not a "V-6" 2nd... Join the club. Id figure out what gears you have then go from there. No surprise that you have to shift down towing a travel trailer.
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Old 09-10-2013, 12:08 AM   #5
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Well i could be wrong if you have a CJ, they came with V-6's
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Old 09-10-2013, 12:10 AM   #6
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But then its a 5speed so unless its been retrofitted its a YJ or a TJ. Stick with my original comment(rambling here) these jeeps are real terrors on the highway.
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Old 09-10-2013, 04:52 AM   #7
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Quote:
Originally Posted by mtilley001 View Post
Hey guys, I'm a new "used" jeep owner here. I am kinda confused about the amount of power my jeep has, when going uphill I lose about 10mph's, is this normal? Or what can I do to increase my horsepower? It is a V6 Wrangler, 5speed, running 33x 12.5 R15 tires, I have installed new plugs. I towed a camper this weekend for the first time and had to shift to 3rd gear to get up hills and basically run in 4th gear for 2 hours just to get home. Any advice would be great!!!!! Thanks
What year is your Jeep?
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Old 09-10-2013, 04:55 AM   #8
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Originally Posted by krisbman View Post
Well i could be wrong if you have a CJ, they came with V-6's
The V6 was last used in a CJ in 71 and that came with a 3 speed tranny so from what the OP wrote, I seriously doubt that is what he is driving. From 72 on, the only 6 that came in a CJ was a I6 in either 232 or 258CID variety.
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Old 09-10-2013, 10:15 AM   #9
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Its a 2003.
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Old 09-10-2013, 12:06 PM   #10
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It's pretty normal. A 4.0 only makes 190 hp so you don't have much extra for towing. When you gear down it helps a lot. Most just down shift a gear and slow down some. If you have your axles regeared to maybe a 4.56 ratio it would be much nicer towing.
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Old 09-10-2013, 06:45 PM   #11
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Its a 2003.
Then your gear ratio is likely either 3.07 or 3.73 unless someone did a gear swap. 3.07s on 33" tires would be horrible and 3.73s would still struggle. The first thing to do is to find your actual ratio. Then, gear swap. That allows you to best use the power your motor makes. Your driving habits would dictate what ratio to go with as well as actual tire height and plans for your TJ. If you plan on going to 35s at some point you would want to factor that into your choice.
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Old 09-11-2013, 05:53 AM   #12
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I have 33s and 377s and it is the same way. When I put the taller tires on I knew this was going to happen.

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