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3.55 vs 3.73 rear end

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Old Aug 21, 2013 | 02:23 PM
  #16  
Zack92MJ's Avatar
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
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Originally Posted by Kris smith
Go big or go home ! I'm going from 307-410
X2. But it's true that XJs are under geared from the start*
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Old Aug 21, 2013 | 02:38 PM
  #17  
Gary Briggs's Avatar
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From: Escalon, Ca
Year: 1996
Model: Cherokee
Engine: 4litre
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I picked up a 8.8 with disc brakes and a LSD with 3.73. I'm going to install it the way it is, see how I like it coming from the 3.07, then determine if 4.10's are necessary. I seem to get around just fine with the stock gears, 31's and the 5 speed. I'm always in low range on the trail so the only time I'm hating the gears is when I pull my boat. I'm hoping the 3.73 will do the trick!
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Old Aug 21, 2013 | 03:26 PM
  #18  
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Are we just assuming its an automatic? What about tire sizes? Increasing the ratio will not help mileage unless its currently under geared due to over sized tires.
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Old Aug 21, 2013 | 09:12 PM
  #19  
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Originally Posted by s14unimog
Are we just assuming its an automatic? What about tire sizes? Increasing the ratio will not help mileage unless its currently under geared due to over sized tires.
He's got 3.55 now. Autos have 3.55 and manuals have 3.07. So everyone's assuming it's an auto
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Old Aug 22, 2013 | 12:01 AM
  #20  
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From: charlotte
Year: 2000
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Engine: 4.6L stroker
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Originally Posted by ct67_72
Xj's are undergeared from the factory anyway. I say if you are going to regear, match the factory final drive and fire size, then add .5 revolutions. So if you went to a 31-32, the oem equivalent gear should be 4.10, but 4.56 would be much better. So on a stock tire size, from 3.54 I would go 4.10. Etc.
Yup. I'm a happy camper with 4.10s and 32's
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Old Aug 22, 2013 | 11:34 AM
  #21  
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Originally Posted by Zacks98
He's got 3.55 now. Autos have 3.55 and manuals have 3.07. So everyone's assuming it's an auto
True. So we're giving recommendations based on assumptions now? Still no word on his tire size either... Just sayin.
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Old Aug 22, 2013 | 12:58 PM
  #22  
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From: Havana fl
Year: 1995
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Engine: 4.0L
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I went from a 3.07 and stock with a stick shift to 3.55's and 32's and it still feels like it did stock..
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Old Aug 22, 2013 | 08:09 PM
  #23  
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Originally Posted by Gary Briggs
I picked up a 8.8 with disc brakes and a LSD with 3.73. I'm going to install it the way it is, see how I like it coming from the 3.07, then determine if 4.10's are necessary. I seem to get around just fine with the stock gears, 31's and the 5 speed. I'm always in low range on the trail so the only time I'm hating the gears is when I pull my boat. I'm hoping the 3.73 will do the trick!
Do you have front 3.73 gears already. The PO swapped a new axle under my jeep from a tow package and I have a 3.73 ring pinion. And carrier. I have a 5 speed and will be putting 3.07 back in it so I can enjoy 4x4 capabilities
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Old Aug 22, 2013 | 08:13 PM
  #24  
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From: Escalon, Ca
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No I have 3.07 gears, only a problem when towing or steep grades.
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Old Aug 22, 2013 | 08:19 PM
  #25  
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I have a set of 3.73 if you plan on doin the front
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Old Aug 22, 2013 | 08:24 PM
  #26  
Gary Briggs's Avatar
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From: Escalon, Ca
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Good lookin out, I may hit ya up when the time comes
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Old Aug 23, 2013 | 01:14 PM
  #27  
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Default 3.55 vs 3.73

If you want to sell that 3.73 -- shoot me an email
randypadre3@hotmail.com

tx, Randy
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