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Thread: Disk brake conversion for 1990 Xj

  1. #1
    Join Date
    Jul 2013
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    Lamoille Nevada
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    Default Disk brake conversion for 1990 Xj

    Is there anybody that knows any conversion kits or has done a conversion to the rear axel of their Xj I keep getting rocks and mud into my drums and it chews up shoes soo bad I want to get away from them.

  2. #2
    Join Date
    Sep 2009
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    Chico, CA
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    29,847

    Default Re: Disk brake conversion for 1990 Xj

    Which rear axle do you have?
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
    Join Date
    Jul 2013
    Location
    Lamoille Nevada
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    27

    Default Re: Disk brake conversion for 1990 Xj

    I don't know these axles came out of a forestry service jeep all I know they are low geared and are stout and have held up to being abused by a cop running the truck through the desert as a chase vehicle

  4. #4
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: Disk brake conversion for 1990 Xj

    Look at the differential cover and compare it with these common XJ diffs

    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  5. #5
    Join Date
    Apr 2009
    Location
    Salem Va.
    Posts
    891

    Default

    A guy by the name of xjtrailrider on Va offroad motorsports(link in my sig.) put a set of ZJ discs on the rear of his XJ and it has the 8.25. Sort of a bolt on deal. Putting a set on a 35 would be a bolt on deal and a 44 shouldn't be a problem since ZJs came with 44a the center section is alum. but the axle tubes are the same as a 44 and I think 8.25 are the same size. When xjtrailrider did his, he had to hone out the backing plate that holds the parking brake and drill a hole or 2. When I get on my laptop I'll post a link or you can go tothe site and look under his build Old Blue.

    Sent from my XT907 using Tapatalk 2
    Last edited by drakan1908; 07-18-2013 at 09:25 PM.

  6. #6
    nickxj94's Avatar
    nickxj94 is offline Level: Uber Jeep Cherokee Trailer Queen
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    Apr 2012
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    Default

    93-97 Zj rear disc is what I used on my 94 xj rear with the 8.25 just have to hone the center of the backing plate out a 1/8 inch or till it fits the tube and its bolt on you will need the bolts from the Zj axle tube to bolt on as there longer and replace your wheel studs with xj front studs or Zj studs if your running aluminum wheels. I also upgraded my master cylinder and booster,proportion valve with the 96 xj now it stops on a dime and holds on hills.
    --______......
    . /__| _ | _\ / / \,____.
    |/ \ \_ | _/_/ \|EIIIIIIEI
    '( o ))-=--) ( o ))--=--)).Just another GREEN XJ lifted on 33's

  7. #7
    Join Date
    Mar 2009
    Location
    South TEXAS
    Posts
    7,244

    Default Re: Disk brake conversion for 1990 Xj

    A guy here at a local 4x4 shop put a set off of a liberty on an XJ with a 8.25 so i guess that may be another option.
    Hey bubba get your hand off my ass,

    Some days it is just not worth it to gnaw through the leather restraints.

    R.I.P. Brian 96_XJ Perrine 1990-2011

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