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Old 06-26-2014, 03:14 PM   #1
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Need Advice

Have a 2006 TJ 4l 6cyl manual 6gear, 3.73 gear ratio with Dana 30 front & Dana 44 rear.

Lately I upgraded to 33" tyre with OME sport suspension and 1.25" zone body lift .

I am not feeling the power !!!! . 6th gear is now useless, max I can reach on highway is 120km/hr and while off-roading cannot go beyond 2nd gear

What do I need to do ...?

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Old 06-26-2014, 03:31 PM   #2
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Sounds like you need to re-gear the diffs to cope with the bigger tyres.

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Old 06-26-2014, 03:35 PM   #3
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Regear. I think you will need 4.56 or 4.88 gears.
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Old 06-26-2014, 03:41 PM   #4
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Yep..it is a $1200 fix. Many just live with it.
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Old 06-26-2014, 05:30 PM   #5
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Either regear to 4.10 or 4.56 depending on use. If you want more low end power for off road use 4.56, if mostly highway with very little off road, use 4.10.
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Old 06-26-2014, 05:56 PM   #6
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I'm running 06 Rubi on 35's soon to be 37's at 7000FT - 14,0000 elevation. I had the 4:10's went to 4:88 an absolute world of difference! If you do decide to re-gear then re-gear based on where you want your Jeep in 2-5 yrs not your 33's right now. Don't pay twice because you failed to plan ahead.
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Old 06-26-2014, 08:47 PM   #7
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So Re-gearing is the issue...
Now between 4.11 & 4.56 ?
My use will be 50:50 between highway & offroad ( sand & sand dunes ) no rock crawling.
Any specific make of gears better than the others ?

Thank you all.
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Old 06-26-2014, 10:36 PM   #8
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My shop recommends Sierra gears.

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