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Thread: ?'s about gears...

  1. #1
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    Default ?'s about gears...

    Ok guys got a 2.5 99 TJ. Just put 33's, stinger, winch and about 4" of lift. How much of diff. would gears make, I have 4.10 now. I really didnt notice much of powerloss(just a little) Im only getting about 180 miles per tank. How much power woukd 4.56 or 4.88 really make, would it improve mpg, thanks in advance guys....

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    Thunder FSGARecovery's Avatar
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    I have 33x12.50 15's on my 06 tj (auto), Dana 30/35, I just has 4.56 installed a week ago from 3.73. Man the new power is awesome. Cant say much on the mpg yet, maybe 1 or 2 miles more. I hear a more narrow tire makes the mpg get better.

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    You have the 2.5?

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    Color Blind Trail Guide TJ 4 the Boxers's Avatar
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    I've got the 2.5 auto with 4.56's, running 33x12.5. Had 3.73's and the difference in power is night and day. Gas stayed about the same after the switch, was a real dog before.
    Not sure if changing to 4.56's will help any

    Got the off of Quadratec's site for tire and gears
    http://www.quadratec.com/jeep_knowle...article-26.htm
    '01 TJ 4 Banger--2" BB w/OME, 1.25 BL, 1" MML, 33" Trxxus, Disco's and Skids.

    www.njjeep.org


    If it's not a BOXER , it's just a DOG!

    Rob

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    G.I. Grandpa SGM O's Avatar
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    With the 2.5L 4-Cyl the correct gearing would be 4.56:1, 4.88:1 would give you more power, but at hwy speeds your rpms would be higher and your mileage would drop. Since you are in Kentucky, altitude is not really an issue, but if you are thinking about going bigger later, or moving to Fort Carson or don't do much highway driving I would go with 4.88 rahte rthan having to regear later, do it right once

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    Devil Doc Navydoc8778's Avatar
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    I would really suggest "re-gearing" to 4.0














    Liters that is. Just giving ya guff. I prefer 4.56's. Had them in my 2.5 XJ a few years ago and it made life much better!

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