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3-Inch Lift Versus Spring Spacers for Jeep ZJ Grand Cherokee


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Mario, the 3" lift would likely require a CV rear driveline to prevent vibration.  There is no slip yoke eliminator (SYE) kit for the NP249 transfer case, only for the NP231.  So you cannot install a rear CV driveline.

 

The spring spacers for 31" tires would be the least challenging.  After installing the spacers, you need to make sure the front axle caster angle is within specification and that the driveline U-joint angles are also in specification.

 

Moses

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Mario...You will likely use longer gas charged shocks, they are available with most of the quality lift kits. 

 

If you were doing a 3.5" lift or a long-arm kit, I would recommend Full-Traction Suspension.  I'm pleased with the FTS 6-inch long arm kit under my XJ Cherokee.

 

The 2" spacer or milder coil spring lift kits are each similar, though some have better construction.  The biggest issue is driveline shake if the rear driveline joint angles are incorrect.  Read the kit details before buying.  The manufacturer should talk about driveline angles and solutions.  Driveline angles can be troublesome on the XJ and ZJ.  Also note whether longer shocks are necessary.

 

Be aware that many of the kits look very inexpensive—unless you need to add gas shocks separately.  Make sure you know whether an additional shock absorber package is required.  Our friends at www.AutoAnything.com are price competitive with each of the popular mild lift kits.

 

Moses

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  • 1 month later...

Hi! Moses How are you?  I have a question regarding  the 31x10.5 tire in my jeep Grand cherokee  is rubbing in my fender  as i was using a rim  which is 15x8 backspace 4,75 can you teach me what to do , and can i use a spring rubber spacer  leveling Kit of 3" please advice Thank you.

 

 

Regards,

Mario from the philippines

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Hi, Mario...If the rub is from the wheel/tire being too far outboard, you could increase the rim backspacing.  Stock rims may be closer to 5.5" backspacing.  Measure the backspacing on a stock rim. 

 

On my Jeep XJ Cherokee, I run 33" tires (285/75R16) on 8" wide rims with 4.5" backspacing.  The American Racing wheel specifications are at:

 

http://www.americanracing.com/wheels/AR172/AR1727/techsheet?year=1999&make=Jeep&model=Cherokee

 

To do this with stock fenders and flares on the XJ Cherokee, I need a 6-inch long arm suspension lift.  To run 31"x10.5" tires on your ZJ Grand Cherokee, you do need a lift.  Did you install the lift we discussed?  If so, how much lift?  Many run 3.75" backspacing, but this requires even more fender and flare room.

 

Moses

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