98 5.9 ZJ axle swap to JK’s - JeepForum.com
 
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post #1 of 7 Old 12-07-2019, 11:51 AM Thread Starter
jedlo
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98 5.9 ZJ axle swap to JK’s

Looking for advice, wanting to upgrade ZJ axles and steering to JKR’s. (Steering, Trac bar, drag link, sway bar, brakes and wheels).

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post #2 of 7 Old 12-07-2019, 12:18 PM
CatSplat
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You'll probably want to start with one of these:

https://www.artecindustries.com/JK2TJ_Front_Swap_Kit
https://www.ironrockoffroad.com/prod...-swap-kit.html

Artec used to make a complete JK44-ZJ rear swap truss but they discontinued it, so you'll probably have to start off with something like the TNT truss and add CA brackets, coil pads, etc.
https://www.tntcustoms.com/jeep_part...zj_tnt_customs

1994 5.9L ZJ | IRO 5.5" CPLA | NP242 | 33" Cooper Discoverer STT Pro
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post #3 of 7 Old 12-07-2019, 01:38 PM Thread Starter
jedlo
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Quote:
Originally Posted by CatSplat View Post
You'll probably want to start with one of these:

http://www.artecindustries.com/JK2TJ_Front_Swap_Kit
http://www.ironrockoffroad.com/produ...-swap-kit.html

Artec used to make a complete JK44-ZJ rear swap truss but they discontinued it, so you'll probably have to start off with something like the TNT truss and add CA brackets, coil pads, etc.
http://www.tntcustoms.com/jeep_parts...zj_tnt_customs
The ZJ is a DD doing towing of my trailer queen 2004 TJR. No “Gonzo” off roading, so are the trusses really needed?
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post #4 of 7 Old 12-07-2019, 01:46 PM
CatSplat
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The trusses themselves aren't entirely necessary for strength in your use case, but they do make it a heck of a lot easier to properly locate all the bracketry you'll need to weld on to make the JK axles work with the ZJ's suspension geometry. You could probably save a few bucks by buying all the brackets (UCA, LCA, track bar, coil pads, sway bar links) separately and measure off your current axle for location.

That of course begs the followup question - if it's just a DD/tow rig, why go to the expense of installing Rubicon axles?

1994 5.9L ZJ | IRO 5.5" CPLA | NP242 | 33" Cooper Discoverer STT Pro
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post #5 of 7 Old 12-07-2019, 03:08 PM
kg6mov
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From a stock 5.9 d44a, the rear JKR axle really isn't an upgrade for towing other than the width improvement.

Getting the jk size brakes up front is totes worth it, but you could get there easier with a WJ knuckle swap.

The skinny is that you either need new brackets on the axle side to make it bolt up to the ZJ suspension, or new brackets on the ZJ side to use the JK suspension, or both. Ballistic fab and others make simple bracket kits, but the artec stuff is going to make it really easy to get it done right the first time.

I'm definitely in the "whytho" camp for a tow rig. If I was going to do any axle upgrade for towing it'd probably be some kind of full floater.


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post #6 of 7 Old 12-07-2019, 06:01 PM
Timo_90xj
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ZJs here across the ocean are rated for 3500kg towing weight @200kg tongue load - that's ~7800lbs/ 450lbs.
Exact same vehicles with zero differencies to the US spec. ZJs - and we unfortunately need to rely on surge brakes on the trailers and no weight distributing hitches.




That being said, wider stance and better brakes won't hurt, so if you're willing to go for the JK axle swap then do so. Slightly over 4" more track width and the possibility to use J8/JK big brakes if you want. You do need to change the brackets, so you either gotta be able to grind & weld, or you need to pay for a shop to do those modifications.

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...


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1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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post #7 of 7 Old 12-10-2019, 12:57 PM
chetzar
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If you want to buy "swap ready" JK Axles, East Coast Gear Supply sell them ready to go. Won't be cheap, but it'll be a lot easier

https://eastcoastgearsupply.com/i-19...30-spline.html

1993 ZJ Limited - 4.0
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