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Old 09-18-2007, 12:54 PM   #1
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Losing lots of power on highway

I have a 95 YJ with 4 inch suspension lift and 33x12.50 mud terrains. Any ideas on getting more power or should I change tire size? Or any mechanical ideas appreciated.

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Old 09-18-2007, 12:58 PM   #2
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I have a 95 YJ with 4 inch suspension lift and 33x12.50 mud terrains. Any ideas on getting more power or should I change tire size? Or any mechanical ideas appreciated.
Upgrade to a new Flux Capacitor, make sure you get the one with the self lubricating muffler bearings! It won't add much in the way of horsepower, but that, 88mph, and 3.2 gigawats of electricity, it won't matter how fast you go, you will always arrive before you left! Great factoy option on the new JK's, I'm pretty sure it's available thru MOPAR for YJ's and TJ's!

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Old 09-18-2007, 01:19 PM   #3
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Not everyone on here is a smart @ss. Regearing is the best way to get some of that power back from your bigger tires. It's not cheap but it will help more than anything else.
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Old 09-18-2007, 01:20 PM   #4
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Change to a smaller tire diameter or lower the gearing (numerically higher).
Do you have a 4.0L or the 2.5? I have a 2.5 with 30" tires and can't imagine the power it would lose trying to push 33s.

Do you have auto or manual tranny?

You have to do something to get a substantial amount of your torque back. The gears will do it. If you have the 2.5, you should have 4.11 gears. You can at least go to 4.30s, maybe even 4.56s is you have a 5 speed.
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Old 09-18-2007, 01:24 PM   #5
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I have a 2.5. Manual tranny 5 speed. what cost am i looking at to regear. or would it be better to go to 31's?
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Old 09-18-2007, 01:36 PM   #6
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I just priced gears at quadratec.com.
They list 4.56 gears at $169 (Front) and $189 (Rear). That's almost $360 in parts. I'm guessing labor could be another $200+ per axle ?? Somebody correct that rate if I'm wrong.

You can get into a new set of 31" BFG tires for $124 ea (BFG AT) or $112 ea (BFG Rugged Trail) at tire rack.
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Old 09-18-2007, 01:44 PM   #7
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Do you plan on using the 33's or are they just for looks?

I love my 31's, but of course I have no lift. Not sure if 31's would look silly on a 4 inch susp lift.

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Old 09-18-2007, 02:28 PM   #8
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I have a 2.5. Manual tranny 5 speed. what cost am i looking at to regear. or would it be better to go to 31's?
Stay with your 33's, just regear for the tires.....

For the amount you'd spend on 31's you could regear, If you have the knolegde to do it yourself, you'll save big! But if you havent, if youre off by a thousandth's of an inch, it could mess you up big time
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Old 09-20-2007, 06:21 PM   #9
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try adding a throttle body spacer, using 93 octane, and stepping up anything that you can and are willing to afford.
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Old 09-16-2009, 11:59 PM   #10
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Change to an electric cooling fan, that will give you 10-15 more horsepower...and gears, don't know what that will do to your mpg's though.
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Old 09-17-2009, 04:54 AM   #11
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If you re-gear, just bite the bullet and put 4.88s in...from what those that have done it have said, it's the bomb!

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