Modified XJ Cherokee Tech XJ (84-01)
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Choosing the proper gear ratio.

Old 03-01-2019, 08:54 AM
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Choosing ratios depends on what you have and what you are doing with it.

Auto AW4 or Manual AX15?
90% street/10% trail or 10% street /90% trail?
Highway driving?
Do you care about fuel mileage?
Engine mods? stock/bolt on's/supercharged

Being honest, we are about 80% street/20% trail-
AW4 stock 3.55 gears 31" and 32" was a dog compared to stock size tires.
AW4 stock 3.55 gears 32" +Supercharger was amazing. Plenty of low end engine torque to accelerate and great highway cruise speed and rpm

AW4 4.56 gears 32/33" sucked. Crawled well and screamed on the highway.
AW4 4.56 gears 35" great combo.

Last edited by CobraMarty; 03-01-2019 at 08:56 AM.
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Old 03-02-2019, 06:08 PM
  #77  
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I found this handy tire size chart which made this calculation easy. Apologies if this had been posted previously. http://www.jekylhyderacing.com/HeightofTires.htm
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Old 04-12-2019, 09:50 AM
  #78  
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New in Hobby question:: I have a 1997 Cherokee . How i can determine my differential specifications. Previous owner says that differentials are the original and the rear is a Chrysler. The Cherokee waslifted 9" with 35 tires. It is OK or i need any mods.
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Old 06-20-2019, 04:14 PM
  #79  
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I have stock gears in a 97 County XJ lifted 4.5 inches with 33's. The gears are 3.55's. I have a limited slip in the rear and an ARB in the front. Can I change the gears without 1- changing the carriers and 2- having to get a different ARB and 3- will the limited slip have to be changed. I am afraid changing the gears will get pretty expensive due to my current setup.
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Old 06-20-2019, 05:18 PM
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Originally Posted by toddreg View Post
I have stock gears in a 97 County XJ lifted 4.5 inches with 33's. The gears are 3.55's. I have a limited slip in the rear and an ARB in the front. Can I change the gears without 1- changing the carriers and 2- having to get a different ARB and 3- will the limited slip have to be changed. I am afraid changing the gears will get pretty expensive due to my current setup.
If your rear is an 8.25 you can keep the limited slip since the 8.25 has no carrier break. The front Dana 30 you will need a different carrier for any gear lower than 3.73.
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Old 06-21-2019, 06:50 AM
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Originally Posted by 00t444e View Post
If your rear is an 8.25 you can keep the limited slip since the 8.25 has no carrier break. The front Dana 30 you will need a different carrier for any gear lower than 3.73.
Can I use the ARB that I have installed in the current D30?
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Old 06-21-2019, 08:52 AM
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Originally Posted by toddreg View Post
Can I use the ARB that I have installed in the current D30?
Unfortunately no, you cannot. You have part number RD101 for 3.55 and down whereas you would need part number RD100 for 3.73 and up.
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Old 06-25-2019, 06:32 AM
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Originally Posted by toddreg View Post
Can I use the ARB that I have installed in the current D30?
Originally Posted by XJlimitedx99 View Post
Unfortunately no, you cannot. You have part number RD101 for 3.55 and down whereas you would need part number RD100 for 3.73 and up.
^^^ What he said.

I'll buy your ARB to help you recoup some of your money haha
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