NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > Modified Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

Reply
 
Thread Tools Display Modes
  #46  
Old October 19th, 2009, 21:50
monkeyevil's Avatar
monkeyevil monkeyevil is offline
NAXJA Forum User
 
Join Date: Mar 2005
Location: Kalamazoo, MI
Posts: 367
Re: WJ brake upgrade for a 2001 XJ... Simplified?

I just swapped the WJ setup from my wifes 94 onto her 00.

I used a set of Spicer upper and lower TJ/XJ/YJ balljoints with no issue.

I used the 00 hubs, a set of new redrilled 99 WJ rotors, the 99 calipers and brackets, .125 thick spacers between the caliper brackets and knuckles. Between the knuckles and hubs I used the same .250 spacer.

Not sure if the 01 XJ is any different, but the above setup is the same I have used on my 93 YJ, and her 94 XJ. With stock rims I've always needed 1.25 wheel spacers. On my YJ I had aluminum wheels with 3.75 backspacing with no rubbing.
Reply With Quote
  #47  
Old October 19th, 2009, 22:05
offrd3's Avatar
offrd3 offrd3 is offline
NAXJA Forum User
 
Join Date: Apr 2005
Location: new jersey
Posts: 77
Re: WJ brake upgrade for a 2001 XJ... Simplified?

I'm trying to figure out how to do this in steps, can i use my inverted Y setup and just mount it to the lower most atachment points on the knuckles. If so then i can wait and redo my steering and track bar in the spring. since i only have 2 inches of lift i'm sure the steering and track bar will be a bit challenging.
Reply With Quote
  #48  
Old October 20th, 2009, 09:33
monkeyevil's Avatar
monkeyevil monkeyevil is offline
NAXJA Forum User
 
Join Date: Mar 2005
Location: Kalamazoo, MI
Posts: 367
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by offrd3 View Post
I'm trying to figure out how to do this in steps, can i use my inverted Y setup and just mount it to the lower most atachment points on the knuckles. If so then i can wait and redo my steering and track bar in the spring. since i only have 2 inches of lift i'm sure the steering and track bar will be a bit challenging.
Should not be an issue... I am pretty sure the WJ lower arms are slightly lower than standard D30 though.
Reply With Quote
  #49  
Old October 20th, 2009, 10:33
sunburned sunburned is offline
NAXJA Forum User
 
Join Date: Jan 2008
Location: So. MD
Posts: 1,995
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by monkeyevil View Post
I just swapped the WJ setup from my wifes 94 onto her 00.

I used a set of Spicer upper and lower TJ/XJ/YJ balljoints with no issue.

I used the 00 hubs, a set of new redrilled 99 WJ rotors, the 99 calipers and brackets, .125 thick spacers between the caliper brackets and knuckles. Between the knuckles and hubs I used the same .250 spacer.

Not sure if the 01 XJ is any different, but the above setup is the same I have used on my 93 YJ, and her 94 XJ. With stock rims I've always needed 1.25 wheel spacers. On my YJ I had aluminum wheels with 3.75 backspacing with no rubbing.
How are the '99 WJ calipers? I thought the best ones to use were the '03 and up Akebono calipers?

On your YJ and the '94 XJ, did you also use '00 XJ hubs or the normal '94 hubs?

Can the stock WJ steering arms be used on an XJ?
Reply With Quote
  #50  
Old October 20th, 2009, 11:56
Gaius's Avatar
Gaius Gaius is offline
NAXJA Forum User
 
Join Date: Nov 2006
Location: Beaverton, OR
Posts: 601
Re: WJ brake upgrade for a 2001 XJ... Simplified?

I also want some clarification:

When using the WJ rotors, there are two options for hubs:
pre-90, no caliper bracket spacer needed.
1990-2000 hubs, .125 spacer needed to space out the caliper bracket.

When using SportTrac rotors:
Need 2001+ TJhubs, likely no spacing needed to center the caliper.

Is this correct?
Reply With Quote
  #51  
Old October 20th, 2009, 22:58
monkeyevil's Avatar
monkeyevil monkeyevil is offline
NAXJA Forum User
 
Join Date: Mar 2005
Location: Kalamazoo, MI
Posts: 367
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by sunburned View Post
How are the '99 WJ calipers? I thought the best ones to use were the '03 and up Akebono calipers?

On your YJ and the '94 XJ, did you also use '00 XJ hubs or the normal '94 hubs?

Can the stock WJ steering arms be used on an XJ?
Best ones are Akebono, correct. Jeep had a recall (or maybe a TSB) on the Teives style so many 99+ have been converted. Mine were not, but I got the complete axle for less than $100, so I figured it didn't matter. So far no issues with rotor warping. On my YJ I ran the Akebobo.

I used 94 YJ hubs on my YJ, 95 XJ hubs on her 95, and now 00 XJ hubs on her 00. I remember running a .250 spacer between the caliper bracket and knuckle on my YJ, but that was 6 years ago and I can't remember why.

I thought the WJ axles were wider? So I really have no clue on that.
Reply With Quote
  #52  
Old October 21st, 2009, 05:34
Talyn Talyn is offline
NAXJA Forum User
 
Join Date: Apr 2003
Location: Radford, Communistwealth of Virginia
Posts: 7,323
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by monkeyevil View Post
I thought the WJ axles were wider? So I really have no clue on that.
They are, but axle width has nothing to do with the spacer. IIRC the spacer is there to keep the axle shaft u-joint in the same plane as the hub's pivot plane.

That reminds me of a high dollar kit I saw someplace (can't remember where now). What they did was sandwich a mounting bracket between he hub and knuckle, which when installed pulled the axle shaft out the housing more and messed up the alignment of the axle shaft u-joint and the knuckle pivot.
Reply With Quote
  #53  
Old October 21st, 2009, 08:59
jdbwrx jdbwrx is offline
NAXJA Forum User
 
Join Date: Jan 2005
Location: Avon, CO
Posts: 675
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by Gaius View Post
I also want some clarification:

When using the WJ rotors, there are two options for hubs:
pre-90, no caliper bracket spacer needed.
1990-2000 hubs, .125 spacer needed to space out the caliper bracket.

When using SportTrac rotors:
Need 2001+ TJhubs, likely no spacing needed to center the caliper.

Is this correct?
I am currently using the '99 composite wheel bearing hubs with my set up (Ford Sport track rotors) and I did have to use a small spacer between the caliper and the knuckle to get the caliper centered on the rotor.

I need new wheel bearings so I ordered the 01 TJ hubs. I will report back when installed and let you know if I needed to use any sort of spacing.

For what it's worth, the '01-'06 TJ hubs are the same as the '00 and '01 XJ hubs/wheel bearing units. (for use with the cast rotor)
Reply With Quote
  #54  
Old October 21st, 2009, 09:31
sunburned sunburned is offline
NAXJA Forum User
 
Join Date: Jan 2008
Location: So. MD
Posts: 1,995
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Hmm, the only WJ I remember seeing the year of in the JY was a '99, so I guess that won't work, unless they give me a badass price on it.
Reply With Quote
  #55  
Old October 26th, 2009, 21:10
XJEEPER's Avatar
XJEEPER XJEEPER is offline
NAXJA Member # 13
 
Join Date: Aug 2002
Location: Wasatch Range
Posts: 8,943
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by XJEEPER View Post
So, after reading thru more WJ steering upgrade swap articles than I can count, I've come to these conclusions:

I'm running 2001 TJ Unit Bearing Hubs right now and I have the JKS 1/4 hub spacers to weld on, so I'll need to run Sport Trac rotors to keep the rotors spaced properly in my Akebono calipers? Does this setup also eliminate the need for washers between the rotor and the hub?

I also need to pick up WJ Lower ball joints to be safe, although many have said that they run XJ uppers and lowers.

I'm already running a Vanco Big Brake kit, which I will be selling when I get the WJ stuff......I'm doing the swap for the steering benefits, as the Vanco kit stops my Jeep very well. I DD my rig on the freeway and I'm done with the poor steering response of an Inverted Y design.

TIA
Update:
I installed my WJ knuckles this past weekend and I used my TJ 2001 TJ hubs, Akebono calipers and 2003 WJ rotors. I transferred the 5 x 4.5 bolt pattern over to the WJ rotor by laying the Vanco hat to hat and scribing the hole placement on the WJ rotor. I center punched the holes and then I threw the WJ rotors up on my drill press and punched 1/4" pilot holes in them, then stepped up to a 9/16" bit and redrilled them. Took me less than 30 minutes to mark the rotors and drill 10 holes....twice.
I then chamfered the holes with a cone taper die grinder bit and they look darn near factory machined, and they fit prefectly.
__________________
Speak the Truth-Question with Boldness-Speak without fear.
Reply With Quote
  #56  
Old October 26th, 2009, 21:53
jdbwrx jdbwrx is offline
NAXJA Forum User
 
Join Date: Jan 2005
Location: Avon, CO
Posts: 675
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Question: What did you guys use for the 12mm x 1.25 pitch bolts that hold the caliper to the knuckle? I can only find grade 8.8 locally. Wondering if I need to try and find grade 10.9.
Reply With Quote
  #57  
Old October 27th, 2009, 09:41
seanyb505's Avatar
seanyb505 seanyb505 is offline
NAXJA Forum User
 
Join Date: Dec 2006
Location: Simpsonville, SC
Posts: 957
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Does redrilling the rotors weaken them at all?
Reply With Quote
  #58  
Old October 27th, 2009, 11:34
woodkrawler's Avatar
woodkrawler woodkrawler is offline
NAXJA Forum User
 
Join Date: Apr 2003
Location: Charlotte, NC
Posts: 487
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Question for you guys: Do I need to get the WJ Caliper brackets and bolts from the JY WJ along with the knuckles or do the Caliper brackets and bolts come with the new parts?
Reply With Quote
  #59  
Old October 27th, 2009, 20:51
monkeyevil's Avatar
monkeyevil monkeyevil is offline
NAXJA Forum User
 
Join Date: Mar 2005
Location: Kalamazoo, MI
Posts: 367
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Quote:
Originally Posted by seanyb505 View Post
Does redrilling the rotors weaken them at all?
Properly torqued wheels rely on friction to hold the rotor, not the studs. So no, not really. Even if it was just he holes and studs, dual drilling the rotors really doesn't compromise strength at long as you have a clean hole and maybe even a small chamfer.

Quote:
Originally Posted by jdbwrx View Post
Question: What did you guys use for the 12mm x 1.25 pitch bolts that hold the caliper to the knuckle? I can only find grade 8.8 locally. Wondering if I need to try and find grade 10.9.
I'm not an engineer, so I replace suspension and steering bolts with the same grade or better. It's hard to find those 1.25 pitch bolts in any grade most places, I'd order 10.8 from McMaster carr.

Quote:
Originally Posted by woodkrawler View Post
Question for you guys: Do I need to get the WJ Caliper brackets and bolts from the JY WJ along with the knuckles or do the Caliper brackets and bolts come with the new parts?
You want the brackets and ideally a pair of calipers to turn in as cores.
Reply With Quote
  #60  
Old October 27th, 2009, 21:48
jdbwrx jdbwrx is offline
NAXJA Forum User
 
Join Date: Jan 2005
Location: Avon, CO
Posts: 675
Re: WJ brake upgrade for a 2001 XJ... Simplified?

Yeah, the more I thought about it, the less I liked the idea of only using the grade 8.8. 10.9 in that size/pitch are hard to find, as Mcmaster among other places didn't have them.
Mcmaster did have grade 12.9 in a 12mm 1.25pitch, but it has an allen style head. I just went with those. Brakes are not an area I want to scrimp on bolt strength. I don't think the 10mm allen head size will be an issue. I think there will be plenty of shoulder on the bolt to work in that spot.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2001 cherokee disc brake e-brake animalbow Modified Tech Discussion 7 October 11th, 2009 20:59
2001 extended e-brake muddeprived Modified Tech Discussion 4 July 8th, 2009 22:17
2001 Cherokee intake w/ rail, injectors and TB. Great Upgrade! drewkeen For Sale: Private Party Only. XJ ITEMS ONLY 1 July 21st, 2006 09:35
9in brake upgrade RalphXJ Modified Tech Discussion 12 October 10th, 2005 17:53
Electric fan options/ upgrade for 2001 XJ.... RockRod Modified Tech Discussion 1 June 21st, 2004 14:23


All times are GMT -7. The time now is 07:34.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014