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Gearing for 1998 XJ Aisen 4 speed Automatic Transmission

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Old Mar 29, 2021 | 07:20 PM
  #1  
ccouvillion's Avatar
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From: Porltand Oregon
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
Default Gearing for 1998 XJ Aisen 4 speed Automatic Transmission

I wanted some help to figure out what gearing I need, currently running 32 x11.50 but will be upgrading to 35s, have Dana 30 up front and Chrysler 8.75 in back with AISEN 4 speed automatic. I’m getting ready to install ARB Air Lockers and want to change gearing while I have diffs opened up

What should I do for Gears ?

Thanks

Last edited by cruiser54; Mar 30, 2021 at 07:38 AM.
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Old Mar 29, 2021 | 08:46 PM
  #2  
00t444e's Avatar
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From: Southern OH
Year: 1997
Model: Cherokee(XJ)
Engine: 4.0
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4.56 gears and I would put a Detroit locker in the rear instead of an ARB, you will get far more use out of it.
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Old Mar 30, 2021 | 05:47 AM
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From: Idaho
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Engine: Peddles
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Arb in the rear will work well. Detroit in the front, I feel a Detroit in the rear may be really aggressive

If in doubt a full locker in the front. Keep it simple with a Detroit or grizzly and can leave the rear open. You have to get a carrier for the dana 30 anyways to make a home for the 4.56

4.56 will be perfect in my opion. I went 4.88 in mine im at 3000rpm at 65mph with 33s . Rpm is alittle high for a daily driver
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Old Mar 30, 2021 | 10:54 AM
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From: Southern OH
Year: 1997
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You will hardly notice a Detroit locker in the rear other than the extra traction you have.
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