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Unread 03-19-2013, 12:27 AM   #1
Charley3
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XJ stock rear springs questions

Hi everyone. I just bought a 98 XJ Classic with tow package. I years ago previously owned a 96 Classic.

The stock tow package rear springs are stiffer than I want. I want a softer ride. So I want to replace rear springs with softer stock springs.

I have read that the stiffer springs are for tow package and up country package, and there are one or more softer spring choices.

---

I am looking for high quality soft riding springs.

I will not be towing. I do not need a lift, but up to 1" lift OK. I need a soft ride because I have a bad back.

---

Questions:

Does a Classic have softer rear springs than a Sport? (When no tow package, nor upcountry package)

What is the part number for rear springs for a Classic (without tow package)?

Besides stock springs, I have read that a company named Crown makes stock equivalent springs. Are Crown springs good?


Last edited by Charley3; 03-19-2013 at 12:42 AM..
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Unread 03-19-2013, 02:46 AM   #2
cory4um
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High quality, soft ride

Old man emu light duty springs is what you want.
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Unread 03-19-2013, 12:26 PM   #3
CJ7-Tim
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The difference in stock spring rates is minimal. Your shocks, tires, and tire pressure have the biggest effect on the '"ride".

If you spring are not sagged, you might try changes in tire pressure and shocks. If your springs are sagged, Old Man Emu are the softest, and the Crown springs are acceptable.
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Unread 03-19-2013, 01:42 PM   #4
Charley3
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The Old Man Emu are a 1.75" lift, and ARB tech support says they have a stiffer spring rate than stock standard spring. (Not stock tow package spring). OME tech says the OME would ride firmer than stock.

Are you saying OME would ride as soft as stock?

Crown springs I was referring to are not lift springs. OME lift spring would ride softer?

I want to use Monroe Sensitrac shocks because I think they ride really nice. Best I ever used (on my prior XJ). These are for stock (or near stock) ride height. So I can't use a lift spring (at least not more than 1").

I want to use stock XJ springs. Either the tow package springs I have, or non-tow-package springs.
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Unread 03-19-2013, 03:15 PM   #5
sAe23
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Did the ARB guy specify what the spring rate was?
According to General Spring's web site http://www.generalspringkc.com/Leaf_...kee_s/1953.htm (and a chart of theirs that floats around the forums) the Cherokee only had two springs: 655Lbs and 745Lbs.
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Unread 03-19-2013, 04:22 PM   #6
Charley3
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Quote:
Originally Posted by sAe23 View Post
Did the ARB guy specify what the spring rate was?
According to General Spring's web site http://www.generalspringkc.com/Leaf_...kee_s/1953.htm (and a chart of theirs that floats around the forums) the Cherokee only had two springs: 655Lbs and 745Lbs.
OME rear light duty springs 148 lbs/in rate

The numbers you quote for stock are NOT spring rate, which is lbs/in. You quoted load rating. Spring rate lbs/in is the number that matters for ride quality.

Do you know the spring rate lbs/in of stock rear springs?
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Unread 03-19-2013, 06:26 PM   #7
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If your looking for something that ride s like a caddy, You need a caddy. XJ's are not not known for their ride quality. You may be chasing your tail with a cherokee. But if you want the best answers/advice don't crunch numbers and spring rates and such. Listen to what some of the experienced guys like CJ-7 Tim are telling you. Guys on this forum who have used the actual products will give you more accurate info on ride quality than some tech spouting numbers on the phone. Hope you find the right combo.
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Unread 03-19-2013, 06:40 PM   #8
CJ7-Tim
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Your shocks, tires, and tire pressure have the biggest effect on the '"ride".




XJ Leaf Spring Specifications

Springs, rear
LL - 3-1/8" free arch, load rating 405
LM - 5-5/8" free arch, load rating 605
LS - 6" free arch, load rating 675
LT - 7" free arch, load rating 755 UpCountry + 1 "

Dealer part numbers:
52000050 Standard Duty, Coded LB
52000051 Standard Duty, Coded LC, EC
52000706 Standard Duty, Coded LN, ES
52000544 Heavy Duty, Coded LK
52000545 Heavy Duty, Coded LL, EL
52000707 Heavy Duty, Coded LM
52002390 Heavy Duty, Coded LS
52002392 Heavy Duty, Coded LT ( UpCountry package +1" leaf spring)

Crown catalog part numbers:
84/01 Standard Duty (LL ) 4 leaf - Jeep P/N 52000051
84/01 Heavy Duty (LS, ZGV, ZVV) 4 leaf -Jeep P/N 4886185
84/01 Heavy Duty (LT, ZGW, ZVW) 4 leaf -Jeep P/N 4886186 or 52002392 - UpCountry + 1"
84/01 Heavy Duty (LK ) 4 leaf - Jeep P/N 4886187
84/01 Heavy Duty (LN, ZUU, ZFU) 4 leaf - Jeep P/N 52000706
84/01 Heavy Duty (LM, ZGU, ZVU) 4 leaf - Jeep P/N 52000707


XJ Spring Rate Tech

Leaf Springs:

OLD MAN EMU-CS034RA (OMEJC1A) 5 leaves in pack, 148lbs/inch s.r. 230mm (9.055") free height= Average lift of ~3"
OLD MAN EMU-CS034RB (OMEJC1B) 5 leaves in pack, 148lbs/inch s.r. 205mm (8.07") free height
OLD MAN EMU-CS035RA (OMEJC2A) 4 + 1 overload, 137/257lbs/in s.r. 235mm (9.25") free height
OLD MAN EMU-CS035RB (OMEJC2B) 4 + 1 overload, 137/257lbs/in s.r. 210mm (8.27") free height
OLD MAN EMU- D22XL (OME Add A Leaf) ~ 1" lift on top of their lift packs
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Unread 03-20-2013, 02:53 AM   #9
Charley3
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My 96 XJ Classic had a really nice ride quality (no tow package).
My cousin had a 98 Sport that rode really nice.
So I know XJ can ride nice, and IMO they are known for good ride as SUV go.

So I know my 99 XJ Classic can ride nice, once tow package rear springs are replaced with stock NON tow package springs. That is my goal.

I appreciate everyone's help, especially help figuring out a stock part number for the rear springs of a Classic WITHOUT tow package and WITHOUT Up Country.

Thanks CJ7-Tim for the spec sheet. I will study it. So far I see it has lots of info about the stock heavy duty springs, and a little info about standard duty springs. I need to learn as much as possible about standard duty stock springs. Like which for a 4L, for a Sport, for a Classic.

Last edited by Charley3; 03-20-2013 at 02:35 PM..
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Unread 03-20-2013, 02:31 PM   #10
Charley3
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Jeep dealer said they can tell me exactly what rear spring a Classic (without tow package) would have, if I can provide a VIN number of a Classic that does NOT have tow package.

Does anyone have a Classic without tow package? Could you please provide me your VIN number? If so, I can give it to my dealer. Then they can enter it in their computer and get a part number for rear springs.

I know a 98 through 2001 Classic would work. Probably an earlier one would work too.
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Unread 03-20-2013, 02:39 PM   #11
rjbruzan
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If a soft ride is what you want stay away from the Bilstein shocks. They are VERY firm. But good in cornering.

Ron
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Unread 03-20-2013, 02:46 PM   #12
Charley3
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Thanks. I am going to get Monroe Sensitrac. I had them on a prior XJ Classic.

They have soft ride and good cornering. Only shock I use on any car.
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Unread 03-21-2013, 03:07 PM   #13
mschi772
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Quote:
Originally Posted by CJ7-Tim View Post
The difference in stock spring rates is minimal. Your shocks, tires, and tire pressure have the biggest effect on the '"ride".

If you spring are not sagged, you might try changes in tire pressure and shocks. If your springs are sagged, Old Man Emu are the softest, and the Crown springs are acceptable.
This.

Don't forget that old, worn-out bushings can also do their fair share to ruin ride quality--most "normal" car owners never maintain this kind of stuff, so they're almost sure to be shot.
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Unread 03-21-2013, 08:51 PM   #14
Charley3
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Quote:
Originally Posted by mschi772 View Post
This.

Don't forget that old, worn-out bushings can also do their fair share to ruin ride quality--most "normal" car owners never maintain this kind of stuff, so they're almost sure to be shot.
How do you maintain bushings?
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Unread 03-21-2013, 08:55 PM   #15
JeepinJeremy
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Quote:
Originally Posted by Charley3 View Post
How do you maintain bushings?
Replace them as needed.
Cracked, Deformed, Broken, Squeaky
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rear springs , spring rate , spring swap , springs , stock suspension

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