xj Brake upgrades - JeepForum.com

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post #1 of 23 Old 07-05-2011, 11:26 AM Thread Starter
rlpetty43
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xj Brake upgrades

I have seen it mentioned in several threads about swaping wj calipers and rotors into a xj. I cant speak for all wj's but my wj has a 5 on 5 bolt patern. are there only certain years or trim packages of wj that have 5 on 4.5? also are the calipers bolt on or is modification required I have tried searching for thread with some detail on this mod with no luck. thanks for any help in advance

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post #2 of 23 Old 07-05-2011, 12:54 PM
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Search wj knuckle swap you will find it
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post #3 of 23 Old 07-05-2011, 01:04 PM
Holder350
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99 was the change over from 4.5" to 5"

After you swap the knuckles the calipers, rotors, and other hardware is a direct fit to the new knuckles....and as long as you get knuckles from a 98 or earlier model the bolt pattern is the same

95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
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You can tell the character of a person in how they treat someone who can do nothing for them.
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post #4 of 23 Old 07-05-2011, 03:50 PM
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but then a 98 and earlier wont be a WJ and thus would not be an upgrade. knuckles from a 99-04 grand cherokee are the ones to get. do a search and all of the info can be found. as for the bolt pattern, you retain your stock 5x4.5" with the swap since you use cherokee hubs.

Completely stock, and keeping it that way...

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Yea, and I thought it was one of the 11 Commandments:
11) Thou shalt love, cherish, and honor till death, thine square headlights above all other earthy things sayith the Lord.
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post #5 of 23 Old 07-05-2011, 03:57 PM
Holder350
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Rotors would have to be stock then also....because the new rotors wont work with the original hubs.

95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
Quote:
Originally Posted by Azzy View Post
You can tell the character of a person in how they treat someone who can do nothing for them.
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post #6 of 23 Old 07-05-2011, 04:53 PM
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With the WJ set up , it goes like this .
WJ spindles
WJ ball joints
JKS spacer(need to be welded)
I think I used 2001 TJ wheel hub bearing (Ill have to confirm)
JKS tie rods
WJ TRE's
WJ double piston calipers
WJ rotors
OTK track bar may be required as well (I haven't "yet" but don't use it on the road)

My cost was very close to $1000 buying everything new but the spindles , but , it is the bomb

Only issue is some pitman arm TRE binding when flexing . I would use a ZJ pitman arm for sure (1" drop) on the XJ

I might have pics in my Orvis build
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post #7 of 23 Old 07-05-2011, 05:30 PM
newfieZJ
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If you want a cheaper option , do this (might have to regitster to see pics)

http://www.jeepsunlimited.com/forums...d.php?t=537460
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post #8 of 23 Old 07-05-2011, 05:40 PM Thread Starter
rlpetty43
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Thanks for all the useful information. can this been done as upgrade to the brakes without messing with the steering?
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post #9 of 23 Old 07-05-2011, 05:56 PM Thread Starter
rlpetty43
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Quote:
Originally Posted by newfieZJ View Post
With the WJ set up , it goes like this .
WJ spindles
WJ ball joints
JKS spacer(need to be welded)
I think I used 2001 TJ wheel hub bearing (Ill have to confirm)
JKS tie rods
WJ TRE's
did you have the rotors machined or something? the wj rotors are a differant bolt pattern and will not fit a xj hub
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post #10 of 23 Old 07-05-2011, 06:17 PM
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Quote:
Originally Posted by Holder350 View Post
Rotors would have to be stock then also....because the new rotors wont work with the original hubs.

no they wouldnt. no offense, but have you read up on any of the WJ knuckle swaps?

you can redrill the WJ rotors yourself to the XJ bolt pattern.


Quote:
Originally Posted by rlpetty43 View Post
did you have the rotors machined or something? the wj rotors are a differant bolt pattern and will not fit a xj hub
nope, redrill them to the proper bolt pattern and go.


read this:
http://www.naxja.org/forum/showthrea...=913774&page=9

Completely stock, and keeping it that way...

My POS
Quote:
Originally Posted by Joe Dillard View Post
Yea, and I thought it was one of the 11 Commandments:
11) Thou shalt love, cherish, and honor till death, thine square headlights above all other earthy things sayith the Lord.
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post #11 of 23 Old 07-05-2011, 07:04 PM Thread Starter
rlpetty43
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thanks for the link that is most clear one I have seen thus far.
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post #12 of 23 Old 07-05-2011, 07:52 PM
newfieZJ
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Quote:
Originally Posted by 1990JEEPXJ View Post
you can redrill the WJ rotors yourself to the XJ bolt pattern.


nope, redrill them to the proper bolt pattern and go.
Thanks , forgot to mention the rotors . Yes , I used WJ rotors and redrilled the bolt pattern
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post #13 of 23 Old 07-06-2011, 07:49 AM
Holder350
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I much prefer a setup where if I break something and need a new rotor to get home....I can get one from the kid at autozone.....and not try to find a machine shop open at 8pm

95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
Quote:
Originally Posted by Azzy View Post
You can tell the character of a person in how they treat someone who can do nothing for them.
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post #14 of 23 Old 07-06-2011, 08:01 AM Thread Starter
rlpetty43
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i personally have never seen a rotor "brake" ,now I have seen them warp or get grooves in em from wore out pads. I have heard they can explode but I think that only happens if one neglects them. But Im sure it is possble I just have never seen it
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post #15 of 23 Old 07-06-2011, 08:15 AM
Holder350
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I have had rotors crack around the hub, to the point I did not feel safe with putting it back on....no matter how far I had to go.

If I were in a situation where I needed a new one quick (need to go to work, caliper locked up and runined a rotor on a trip to the beach.) I would much rather have off the shelf parts on such a critical system like the brakes.

Just my opinion.....plus I have had no issues with the stock setup, so I cant see upgrading where I have no issue.

95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
Quote:
Originally Posted by Azzy View Post
You can tell the character of a person in how they treat someone who can do nothing for them.
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