Lifting 98 ZJ 5.9 limited - JeepForum.com
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post #1 of 13 Old 03-26-2020, 11:44 AM Thread Starter
jedlo
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Lifting 98 ZJ 5.9 limited

Wanting to lift 2” - 3” with springs only. Jeep is a DD and tow vehicle. What is the best combination of springs and shocks?

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post #2 of 13 Old 03-26-2020, 01:35 PM
1996maroonzjf
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The best combination of springs and shocks, in my opinion, would be Old man Emu (OME) HD coils and Bilstein 5100 shocks. The OME coils net around 2.5" on a stock ZJ with no added weight from bumpers, etc. Ive been running them for 4+ years on 2 different ZJs now and they handle and ride great on and off road.

Talk to @Kolak on this forum - he will get you everything you need at a lower price than can be found online.

The one thing to be aware of is that most later V8 ZJs came with the 249 transfer case (Quadra-Trac) and used a rzeppa CV joint (rubber bellows) in the front driveshaft at the front axle end. These type of driveshafts have a very limited range of motion and will come apart very quick and possibly violently when you lift a ZJ. That's why a lot of website will have disclaimers saying their lifts will not work on a V8 ZJ. They will work but you need to change your front axle output and driveshaft to a u-joint style to avoid catastrophic failure of the driveshaft.

Edit: As pointed out below by Timo - early V8 ZJs has the single u-joint on the axle pinion end of the driveshaft, and later V8s used the rzeppa CV joint (rubber bellows) on the axle pinion end that I was referring to above.
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-Tim
(2) '96 4.0s
#1-'10-'18
#2- HP30/Ford 8.8 - 4.56, OME HDs, 5100's, IRO Adj Arms/Track Bars
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post #3 of 13 Old 03-27-2020, 03:07 AM
Kolak
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Thanks for mentioning me! I'd be happy to assist.

I agree that the OME springs would be an excellent foundation for your lift. You'll get 2"+ lift with great ride and handling.

If you'd like to chat about your lift, you can PM me here on the forum or email me at [email protected]

Kolak Performance and Offroad
Member: Specialty Equipment Market Association
Telephone: 480 998-3661

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post #4 of 13 Old 03-28-2020, 08:48 AM Thread Starter
jedlo
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Thanks for the information, I contacted Kolak and ordered OME w/Bilstiens. 🙂
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post #5 of 13 Old 04-02-2020, 01:34 PM
diggler55
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excellent choice, thats what i went with as well!
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post #6 of 13 Old 04-02-2020, 09:29 PM
HapaGC59
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Just got done doing the rough country 3.5” kit. Front springs swap to the rear and I added extra spacers up front to level it out. The kit comes with track bar relocation brackets but I went with adj trackbars and adjustable upper arms to take some stress off the driveshaft angles. Kit also comes with front sway bar link extensions but nothing for the rears. So far it rides great but sitting still at the moment for complete interior overhaul/sound deadening
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post #7 of 13 Old 04-05-2020, 09:42 AM
TheBoogieman
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Quote:
Originally Posted by HapaGC59 View Post
Just got done doing the rough country 3.5” kit. Front springs swap to the rear and I added extra spacers up front to level it out. The kit comes with track bar relocation brackets but I went with adj trackbars and adjustable upper arms to take some stress off the driveshaft angles. Kit also comes with front sway bar link extensions but nothing for the rears. So far it rides great but sitting still at the moment for complete interior overhaul/sound deadening
Those RC shocks are going to ride as stiff as Bilsteins.

Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
03' Rubicon/Zone 4" coils with 1" spacers up front/Rancho shocks/5.13 gears-35" MTZs/Black Magic brakes.
99' XJ /4.0L-AW4/ 5.5" lift / Rancho RS5000X shocks/33" DC Extreme country MTs. Jeep #18
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post #8 of 13 Old 04-06-2020, 03:20 AM
Timo_90xj
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Originally Posted by TheBoogieman View Post
Those RC shocks are going to ride as stiff as Bilsteins.
Bilstein shocks don't ride stiff unless you get ones that have too much compression and rebound valving for your vehicle.
The 5100s I had were plush, and the current 7100s which have stiffer compression and slower rebound valving compared to the ZJ- specific 5100s - are still very plush on the initial travel, damping ramps up at higher piston speeds.

I do not have personal experience on the newer RC nitrogen- charged shocks, but all the different types of older ones I've had were damn crappy in just about every possible way

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 Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
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 #9 of 13 Old 04-06-2020, 06:57 AM
TheBoogieman
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Originally Posted by Timo_90xj View Post
I do not have personal experience on the newer RC nitrogen- charged shocks, but all the different types of older ones I've had were damn crappy in just about every possible way
I sold a set of their newest RC N3 shocks for $100 to get rid of them. They were great offroad and on large bumps, but on the road I could feel it if I ran over a penny. I like my new Rancho RS5000X shocks as much as my "way more" expensive 9000XL adjustable ones.

Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
03' Rubicon/Zone 4" coils with 1" spacers up front/Rancho shocks/5.13 gears-35" MTZs/Black Magic brakes.
99' XJ /4.0L-AW4/ 5.5" lift / Rancho RS5000X shocks/33" DC Extreme country MTs. Jeep #18
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post #10 of 13 Old 04-06-2020, 09:20 AM
Timo_90xj
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Ok, so the newer RC nitro shocks are just as crappy as the older ones My Bilsteins have been a gazillion times better than any of the RCs - butter smooth over small bumps and taking bigger hits pretty damn well. 5100s were a bit too soft for my liking, the 7100s I bought have been great.
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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 Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
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 #11 of 13 Old 04-07-2020, 05:09 PM
Rallyrs
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Quote:
Originally Posted by 1996maroonzjf View Post
.....,,

The one thing to be aware of is that all V8 ZJs came with the 249 transfer case (Quadra-Trac) and used a CV joint in the front driveshaft at the front axle. These type of driveshafts have a very limited range of motion and will come apart very quick and possibly violently when you lift a ZJ. That's why a lot of website will have disclaimers saying their lifts will not work on a V8 ZJ. They will work but you need to change your front axle output and driveshaft to a u-joint style to avoid catastrophic failure of the driveshaft.
This comment concerning the front driveshaft concerns me.

Did some ZJ use a front driveshaft with a U joint on one end and a Rzeppa joint on the other?

And then some used a U joint on one end and a double cardan on the other?

And is there a third type?

My 1998 ZJ has a front driveshaft with a ujoint on one end and double cardan on the other.

Does my front driveshaft need to be changed to a different style when installing a lift?

Or that’s only for people with a different style driveshaft than mine?
.
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post #12 of 13 Old 04-07-2020, 11:29 PM
Timo_90xj
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ZJ front DS either has a rzeppa joint @ pinion end + double cardan joint @ TC end (most of the newer 249-equipped), or single u-joint at pinion and double cardan joint at TC (all of the older ones regardless of TC, most of the newer ones with a 242 or 231).

On a lifted ZJ, you must use a single u-joint + double cardan joint style.
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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 Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
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 #13 of 13 Old 04-08-2020, 12:43 AM
Rallyrs
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Originally Posted by Timo_90xj View Post
ZJ front DS either has a rzeppa joint @ pinion end + double cardan joint @ TC end (most of the newer 249-equipped), or single u-joint at pinion and double cardan joint at TC (all of the older ones regardless of TC, most of the newer ones with a 242 or 231).

On a lifted ZJ, you must use a single u-joint + double cardan joint style.
Ok,thanks.

My 98 v8 249 laredo has the single u-joint and double cardan type so I guess I'm good.
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