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Unread 05-20-2012, 09:37 PM   #1
ktx_jeeper
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1999 TJ Wrangler 
 
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Re-Gearing and Gas Mileage

So, I'm assuming that Re-Gearing and Gas Mileage go with each other, If I have 33 inch tires, and 3.73 gears, I know that bad. But would re-gearing to 4.56 make my gas mileage a little better? Or would it kill it. Or maybe stay the same.
And also, I'm about to swap out my current lift with a RC LA kit, what shocks do y'all recommend. Any and all advice is greatly appreciated! Thanks guys!

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Unread 05-20-2012, 10:11 PM   #2
fire2fire
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With 33 if you wanted to go back to stock performance you should go to 4.10 or 4.56 if you want it a bit lower geared. I went with 4.10's on my 97 and was very happy with it, but i used it as a DD.
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Unread 05-21-2012, 10:26 AM   #3
Emolas
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I went 4.56 in mine after getting 33" tires and there was a significant difference for the better in both gas mileage and performance. Now the engine doesn't have to work so hard to spin those heavy tires.
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Unread 05-21-2012, 10:36 AM   #4
comptiger5000
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Going to 4.56 will likely help your city mileage, although 4.10s would likely give better highway mileage (lower rpm vs speed is better, up to a point).
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Unread 05-21-2012, 10:04 PM   #5
ktx_jeeper
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I do more city stop and go than highway. It's my DD. Is there an equation that can help me figure?
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Unread 05-21-2012, 10:08 PM   #6
comptiger5000
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In that case, I'd probably go 4.56.
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Unread 05-22-2012, 03:39 PM   #7
ktx_jeeper
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Alright sweet thanks guys. What about shocks?
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Unread 05-22-2012, 06:38 PM   #8
Technohead
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Don't expect miracles.

It would take years to recoup the cost of regearing through increased mpg. There is really only one reason to regear: improved off-road performance.
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Unread 05-23-2012, 10:03 PM   #9
ktx_jeeper
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Yea, I need a limited slip system, as on my budget I can't afford selectable lockers and I refuse to put lunchbox lockers on my DD. So when I go in and do that, I will regear, because I need the performance. My deer lease ain't too friendly.
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Unread 05-23-2012, 10:31 PM   #10
fire2fire
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Quote:
Originally Posted by ktx_jeeper View Post
Alright sweet thanks guys. What about shocks?
I was stupid at first and put Ranchos 5000 on my jeep and regret it every min I was driving. Do yourself a favor, spend a couple extra bucks and buy Old Man Emu shocks.
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Unread 05-23-2012, 10:46 PM   #11
02crewcab
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i had a brand new set of rancho 5000's blow out on me not even a full year after i bought them. and they rode like sh*t
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