ZJ rear disc brakes on an XJ.....

caspers_hatch · 10-14-2005, 08:37 AM

Will it work? I have a ZJ i am parting, it has rear disc brake and my XJ has the pesky drums. Thanks

**FitchVA** · 10-14-2005, 09:31 AM

what axle do you have?

law.74 · 10-14-2005, 09:45 AM

some ZJs have a D44 with an aluminum center-section that will not receive some lockers. I'm not sure why, personally. I've heard of someone putting a D35 in place of an alum D44 for strength reasons. More info would be nice.

Quick test: see if a magnet will stick to the diff (not cover of course), & compare the shape to your D35 or D44.

The parts may bolt up if both are D44s

Interesting...Procede

ColoradoXJ13 · 10-14-2005, 12:15 PM

The info is out there, but yes, it will work. I took ZJ D44a discs and put them on my C8.25 axle, they will work fine on a D35 too.

caspers_hatch · 10-14-2005, 12:55 PM

ok, my XJ is 2wd (no laughing please) I am using what i can from my ZJ and my 67' ford bronco to make my XJ off-road worthy.

I wasn't sure if i can use the whole axle assembly off the ZJ or if i had to do all the mods i read about in the FAQ.

TheBandit181 · 10-14-2005, 01:17 PM

ZJ rear discs from a D35 will bolt up to an XJ with a D35 or 8.25. The 8.25 will require some dremmeling of the center section on the backing and mounting plates. I did it and it was worth it.

http://www.jeepforum.com/forum/f11/8-25-rear-disc-conversion-write-up-97483/
http://www.jeepforum.com/forum/f11/teraflex-rear-disc-brake-conversion-kit-181425/
http://jeepin.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=9;t=006330
http://home.swbell.net/rriojas3/reardisk.html
http://cherokeekid5.tripod.com/zj_discs_on_a_xj.htm

That should get you started.

twisted_ed · 10-14-2005, 01:43 PM

yep it will work awesomely... and u cant use the axle assembly cause the ZJ is coil if i remeber correctly and the XJ is leaf sprung..

10-14-2005, 12:15 PM	#4
ColoradoXJ13 Registered User Join Date: May 2004 Location: Boulder, CO Posts: 149 Profile Gallery Classifieds My Jeeps	The info is out there, but yes, it will work. I took ZJ D44a discs and put them on my C8.25 axle, they will work fine on a D35 too. __________________ 2001 Silver XJ, 4.5" Lift, 31's, SYE/DS, Gas/TC/diff skids, rails, and mud.

10-14-2005, 12:55 PM	#5
caspers_hatch Registered User Join Date: Apr 2005 Location: Virginia Beach Posts: 13 Profile Gallery Classifieds My Jeeps	ok, my XJ is 2wd (no laughing please) I am using what i can from my ZJ and my 67' ford bronco to make my XJ off-road worthy. I wasn't sure if i can use the whole axle assembly off the ZJ or if i had to do all the mods i read about in the FAQ. __________________ 97' ZJ 5.2 Limited- [B]Being Parted out.[/B] 88' XJ 4.0 (2wd...for now) I am N.O.R.M.L!

10-14-2005, 01:43 PM	#7
twisted_ed Registered User Join Date: Jul 2004 Location: Courtenay, British Columbia, Canada Posts: 1,357 Profile Gallery Classifieds My Jeeps	yep it will work awesomely... and u cant use the axle assembly cause the ZJ is coil if i remeber correctly and the XJ is leaf sprung.. __________________ 1990 Jeep Cherokee Laredo 4.0L Automatic Tranny NP242 Transfer case Dana 30 front, 35 custom rear differentials Mods: RE 4.5" Lift 32x11.50 BFGoodRich M/T KM's American Eagle 058 Polished Aluminum Wheels, 3.63" BS. Grand Cherokee Rear Disc Brake setup Custom Downpipe W/ Cat Removed. Dynomax Super Turbo Muffler. Surco Roof Rack My Jeep

10-14-2005, 09:45 AM	#3
law.74 Registered User Join Date: Sep 2005 Location: Too far from Moab Posts: 546 Profile Gallery Classifieds My Jeeps	some ZJs have a D44 with an aluminum center-section that will not receive some lockers. I'm not sure why, personally. I've heard of someone putting a D35 in place of an alum D44 for strength reasons. More info would be nice. Quick test: see if a magnet will stick to the diff (not cover of course), & compare the shape to your D35 or D44. The parts may bolt up if both are D44s Interesting...Procede

10-14-2005, 01:17 PM	#6
TheBandit181 Registered User Join Date: May 2005 Location: (home) Economy, PA or (school) Indiana, PA Posts: 55 Profile Gallery Classifieds My Jeeps	ZJ rear discs from a D35 will bolt up to an XJ with a D35 or 8.25. The 8.25 will require some dremmeling of the center section on the backing and mounting plates. I did it and it was worth it. http://www.jeepforum.com/forum/f11/8-25-rear-disc-conversion-write-up-97483/ http://www.jeepforum.com/forum/f11/teraflex-rear-disc-brake-conversion-kit-181425/ http://jeepin.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=9;t=006330 http://home.swbell.net/rriojas3/reardisk.html http://cherokeekid5.tripod.com/zj_discs_on_a_xj.htm That should get you started.