Why does Jeep even have a wide range of spring rates/lengths? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Like Tree16Likes
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-19-2016, 08:53 AM
Thread Starter
  #1
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
Why does Jeep even have a wide range of spring rates/lengths?

Wranglers seem to come with different spring sets front and rear, seemingly installed at random. Apparently there are fronts ranging from 13 to 19 or 20 and rears from 53 or so to 60. My Willys 2-door (which had the "Performance suspension" from the Rubicon") had 13/54, iirc, which was about as low as it gets.

But why? Why do 13s even exist? And if there's a need for 13s and 19s, why a need for 14, 15, 16, 17, and 18? And why is it random? That makes as much sense as Jeep ordering wheel/tire sets from their suppliers that range from 16" steelies with 225s, to 17" alloys in three different styles, wearing LTs, ATs, and MTs, to 18" alloys with ATs, and then just slapping them willy-nilly on whatever Jeep is next down the line, regardless of what model it is.

First question: why are there different springs? And given that it might make sense to have different spring rates and lengths for 29" tires and steel wheels than for 32s and alloy, why is it not strictly model-specific, with spring sets always mated to wheel/tire sets? And most particularly, why doesn't the Performance Suspension of the Rubicon get different spring rates 100% of the time and automatically?

It's like Jeep's "suspension engineers" are a bunch of 16YO guys whose knowledge base comes from reading Motor Trend. Every other manufacturer I've ever heard of has specific, finely-tuned spring & shock combinations designed specifically for the different models of vehicles they sell. The idea that you might get 300# springs in your Willys or you might get 400# springs, depending on what day it was built, is just insane. They'd know better than that at the PepBoys service bay.

Caveat: I am taking it on faith that the Forum Wisdom is correct in assuming that the different numbers on spring sets correlate to actual differences in the spring rates and lengths. I've not verified that for myself, nor ever actually handled any OEM springs except my 13/54s.

1386570 likes this.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 08:58 AM   #2
Jeeper
 
Join Date: Jun 2015
Location: Dallas, TX
Posts: 625
Go weigh all the different configurations of JKs on a given dealer's lot and you'll have your answer.

webwarmiller is offline   Quote
Old 12-19-2016, 09:04 AM   #3
Jeeper
 
Join Date: Oct 2016
Posts: 45
Quote:
Originally Posted by webwarmiller View Post
Go weigh all the different configurations of JKs on a given dealer's lot and you'll have your answer.
It doesn't have to be JKs, all vehicles (at least ones I am familiar with) have this range of spring groups. Of course this being a JK forum I understand the suggestion.
__________________
2016 JKU 75th A/T 3.73
Grizzloonly is offline   Quote
Sponsored Links
Advertisement
 
Old 12-19-2016, 09:20 AM   #4
Jeeper
 
Join Date: Jun 2015
Location: Dallas, TX
Posts: 625
Quote:
Originally Posted by Grizzloonly View Post
It doesn't have to be JKs, all vehicles (at least ones I am familiar with) have this range of spring groups. Of course this being a JK forum I understand the suggestion.
But that's the point. You have different weights within a model so they produce a range of spring rates to account for them all. Now, with that said, there might only be two spring rates that the springs are manufactured to. Some will spec high and others low and they then get sorted into a number. Probably similar to golf shafts. All dynamic gold shafts are produced to the same spec. they are then weight sorted and the lightest are 100's and the heaviest 400's.
webwarmiller is offline   Quote
Old 12-19-2016, 09:29 AM   #5
Jeeper
 
arjeeper's Avatar
 
Join Date: Apr 2012
Location: Bella Vista, AR
Posts: 529
Quote:
Originally Posted by webwarmiller View Post
Go weigh all the different configurations of JKs on a given dealer's lot and you'll have your answer.


Agreed. They vary quite a bit in weight and Jeep is installing springs to match.

I think this is why it's so hard to get the right ride quality once the factory springs have been replaced. Most of the aftermarket lifts only have a couple spring rates and aren't anywhere near as dialed-in as the factory springs.

I think this is something the Jeep engineers are getting right.
__________________
'16 JKUHR Granite Crystal Metallic. Auto. 4.10s. Alpine.
Gone: '06 XK, '12 JKR, '06 LJ Rubi, '06 WK, '04 TJ, '97 ZJ, '95 YJ
arjeeper is offline   Quote
Old 12-19-2016, 11:40 AM
Thread Starter
  #6
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
You're missing the point. Anecdotal evidence on this forum over the years has suggested a randomness to it. Meaning that a 4-door might have lower numbers than a 2-door, a Rubicon might have lower numbers than a Sport, etc. I'm just going on what people have reported their stock springs as being.

And non-anecdotally is the fact that different shocks should be mated to different springs. So if you're getting red shocks, there should be correlated springs; sure, maybe one set of springs for 2-doors with red shocks and one set for 4-doors with red shocks. But still, springs that are tailored to the shock's rebound rate, etc.

Yet I received the lowest rated shock (if they are linear according to the numbers) on a package with the red shocks, and with 17" wheels with 32" MTs. Meaning I got the same shocks as a 2-door Sport with 29" ATs on 16" wheels. That is what makes no sense and leads me to believe the spring selections are not correlated -- or at least not uniformly correlated -- to vehicle and wheel and tire weight.
1386570 likes this.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 11:56 AM   #7
Jeeper
 
Join Date: Aug 2014
Posts: 1,501
I am with you on this, they seem random anymore.

The heaviest JK on the road is a JKUHR with Hardtop and Auto. They come with 17/59s, "most" of the time. But I have seen some JKUS that have 19/60s. I do think that there is a bill of materials that hasn't been updated for years, and that when the new models come out they clone the old BOM and they swap out some parts that doesn't include the springs.
stumblinhorse is offline   Quote
Old 12-19-2016, 12:59 PM   #8
Jeeper
 
Join Date: Sep 2012
Location: UK
Posts: 646
I can't imagine they are random. There must be some formula behind it based on how the Jeep leaves the production line. You'd expect a 2dr soft top to have lighter springs than a 4dr hard top for example. Free length might vary too because of weight distribution front and rear.
DavidW954 is offline   Quote
Old 12-19-2016, 01:01 PM   #9
Jeeper
 
Hafaday's Avatar
 
Join Date: Feb 2014
Location: Richmond, VA.
Posts: 20,020
While I agree. I also wonder if dumb weight (power window/locks = heavier doors and the auto/hard top. even tire selection) play into the spring selection. Possible gear ratio as well.

My 14 JKUS with the manual, soft top and max tow (3.73) had 16/58's for springs, with the black shocks. I kinda wonder if the +/- weights play into spring selection. While I'm at it.. My 14 has a GVRW of 5400lbs. (brochure says 5500lbs.). Again, I wonder if the +/- weights along with spring selection play into that factor.

Done rambling.
__________________
Bill.

14, Silver, JKU.
3 SIX with a manual
Hafaday is offline   Quote
Old 12-19-2016, 01:07 PM   #10
Jeeper
 
Pedals2Paddles's Avatar
 
Join Date: Mar 2015
Location: MoCo MD
Posts: 1,113
Every time you change the groups and options, it changes the weight and handling. The spring rates will vary based on what option groups and packages were selected at the time of manufacture. I don't work at the plant. But I am 100% confident it isn't random. Just because nobody has personally provided you with the engineering logic behind it doesn't mean no logic exists.
__________________
2017 Unlimited Sport-S
As Delivered: LED Lighting Package, Dual Top, Uconnect, SiriusXM, & Slush Mats
Complete: 33s,
LOD rock slider steps, Teraflex Boost Leveling, Remote Start, custom OTRATTW switch panel, lights everywhere
In progress: Rock hard skid plates, winch on OEM bumper
Retired: 2014 JK Sport
Pedals2Paddles is offline   Quote
Old 12-19-2016, 02:03 PM
Thread Starter
  #11
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
Quote:
Originally Posted by Pedals2Paddles View Post
Just because nobody has personally provided you with the engineering logic behind it doesn't mean no logic exists.
Which is why I have asked if there actually IS any logic behind it. And given reasonable anecdotal refutations of the "oh, if you add power windows the engineering fine-tuners down at the plant figure you need a different spring rate" explanation. I.E. JKU Sports coming with 13/55s, while JK Rubicons coming with 18/59s; I don't care how much more the D44 and lockers up front weigh than the D30 open diff, the JKU is still going to weigh more than the JK. And yet it doesn't always get the high-numbered spring combo. And if you counter with "Performance Suspension gets the high numbers" I have my own Performance Suspension JK with 13/54 to counter that.

So yes, you're right, just because I haven't been personally given the logic behind it doesn't mean there is no logic. But by the same token, "weight of the vehicle" is clearly not the "logic" behind the spring choice. And that is why I started the thread -- to ask what (if any) logic there is behind it.

I would suggest that your blind belief there IS logic behind it is no more rational than my observations that there DOESN'T SEEM to be any logic behind it. But I'm always open to hearing more. That's why I started the thread.

Cheers!
1386570 likes this.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 02:14 PM   #12
Jeeper
 
XmentalX's Avatar
 
Join Date: Nov 2015
Location: Bay Area
Posts: 1,373
Quote:
Originally Posted by NoGaBiker View Post
Wranglers seem to come with different spring sets front and rear, seemingly installed at random. Apparently there are fronts ranging from 13 to 19 or 20 and rears from 53 or so to 60. My Willys 2-door (which had the "Performance suspension" from the Rubicon") had 13/54, iirc, which was about as low as it gets.

But why? Why do 13s even exist? And if there's a need for 13s and 19s, why a need for 14, 15, 16, 17, and 18? And why is it random? That makes as much sense as Jeep ordering wheel/tire sets from their suppliers that range from 16" steelies with 225s, to 17" alloys in three different styles, wearing LTs, ATs, and MTs, to 18" alloys with ATs, and then just slapping them willy-nilly on whatever Jeep is next down the line, regardless of what model it is.

First question: why are there different springs? And given that it might make sense to have different spring rates and lengths for 29" tires and steel wheels than for 32s and alloy, why is it not strictly model-specific, with spring sets always mated to wheel/tire sets? And most particularly, why doesn't the Performance Suspension of the Rubicon get different spring rates 100% of the time and automatically?

It's like Jeep's "suspension engineers" are a bunch of 16YO guys whose knowledge base comes from reading Motor Trend. Every other manufacturer I've ever heard of has specific, finely-tuned spring & shock combinations designed specifically for the different models of vehicles they sell. The idea that you might get 300# springs in your Willys or you might get 400# springs, depending on what day it was built, is just insane. They'd know better than that at the PepBoys service bay.

Caveat: I am taking it on faith that the Forum Wisdom is correct in assuming that the different numbers on spring sets correlate to actual differences in the spring rates and lengths. I've not verified that for myself, nor ever actually handled any OEM springs except my 13/54s.
As someone whose 2dr HD tow dual top Rubicon came with some of the softest springs available id love to know the reasoning behind their choices.
__________________
On Jeep #6 & 7

91 XJ 4.0 > 93 YJ "4 Angry Squirrels" > 95 ZJ "Magnum" Limited > 07 JK Sahara > 15 JKU Sport S > 16 JK Rubicon & 17 Renegade Trailhawk for the Other Half
XmentalX is offline   Quote
Old 12-19-2016, 02:28 PM   #13
THE MIGHTY GRIZZLY!

5-Year WF Supporting Member
::WF Moderator::
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: AZ. In the Ponderosa Pine Country, where the Bears are hungry..
Posts: 24,840
2 door, verses 4 door.

Hard Top verse soft Top.

Towing package, yes or no.

Additional weight, such as the JKRHR, or the JKURHR.

^^^All of the above.

Now, why are the spring numbers not consistent with the same model and model year.

Example: Several on our Forum have reported 18 fronts and 59 rears on their new 2016 JKURHR WITH hard top, yet my Grand-sons new 2016 JKURHR has 19 fronts and 60 rears.
So this convinces me that inventory control quantities, or some random pull does exist.
__________________
1974 CJ5, 2003 TJ, 2013 2 door Black Rubicon, auto, with 4.10 ratio.
Shaking at 40-70 MPH, Read this!!!

The Mighty Grizzly is not concerned,
with
the needs of the Hunter....


Click here and become a WF supporting Member
Old Dogger is offline   Quote
Old 12-19-2016, 02:56 PM   #14
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 6,644
I think the only way we could even start to make sense of this is to gather a list of the model and options and see what spring rates we get. I had 15/57 on my 2014 2dr RubiX with soft top and no tow package. I agree though there is no obvious pattern to what is happening. I have even seen posted people have different spring on the front between right and left, i.e. 15 left and 16 right.
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is offline   Quote
Old 12-19-2016, 03:07 PM
Thread Starter
  #15
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
Quote:
Originally Posted by TerryC6 View Post
I think the only way we could even start to make sense of this is to gather a list of the model and options and see what spring rates we get. I had 15/57 on my 2014 2dr RubiX with soft top and no tow package. I agree though there is no obvious pattern to what is happening. I have even seen posted people have different spring on the front between right and left, i.e. 15 left and 16 right.
Not a bad idea -- of course, it's just for curiosity's sake. Nobody keeps them anyway! Feel free to pile on with yours everybody.

So:

TerryC6: 2014 2dr RubiX with soft top and no tow package. 15/57.
NoGaBiker: 2014 2dr WW, soft top, tow package. 13/54 (just confirmed -- they're still in the basement.)

Looks like Terry got 2(front) and 3(rear) notches higher springs than me, when we both have 2-door soft tops with Performance Suspension.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 04:13 PM   #16
Jeeper
 
WhiskeyRanger's Avatar
 
Join Date: Aug 2015
Posts: 1,789
I have not worked at Toledo, but I have been involved in manufacturing for a long time and have had similar situations.

In our case...

We had several weights of parts available that each was actually a range of weights given an arbitrary distinction. In our case it was A-E but could have easily been a number like 13-19 or whatever they use for the springs. When it got to assembly, there was a balance test. This gave us a ballpark on what weight we needed to use. Sometimes it was a light assembly and we needed to use the lightest range...A. Sometimes it was on the border of two weights, so we got a B/C result meaning either would work and you would just grab whatever you had more of but you had to use all the same... No mixing weights. This also applies to certain bearing thicknesses.

If you take all the numbers of springs it is obviously not random, but there is some variation. Unless you see a large number of 19/60 2 door soft top sports from the factory, I wouldn't think too much into it.
WhiskeyRanger is offline   Quote
Old 12-19-2016, 04:33 PM
Thread Starter
  #17
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
But, the "different tolerances and we mix them" argument is not analogous. Because this is not a situation of slightly different tolerances and then picking the best ones. These are individually part numbered different parts, all of which have obviously been intentionally spec'd and ordered by Chrysler with their individual specifications. In other words, it's not as you describe wherein a bunch of springs come in, they're all tested, and some are 392 pounds and some are 396, and the spec calls for 394. It's more like the spec calls for 394 but you order 375s 400s and 425's from your vendor and then grab whichever one comes to hand when a truck comes down the line. Why?
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 04:46 PM   #18
Supporting Member

5-Year WF Supporting Member
 
cbunting24's Avatar
 
Join Date: Apr 2016
Location: Guilderland, NY
Posts: 1,601
Quote:
Originally Posted by NoGaBiker View Post
TerryC6: 2014 2dr RubiX with soft top and no tow package. 15/57.
NoGaBiker: 2014 2dr WW, soft top, tow package. 13/54 (just confirmed -- they're still in the basement.)
cbunting24: 2015 4dr Rubi HR, hard top, tow w/4.10's. 19/60

Just adding to the list before they leave the basement and go to their new home.
__________________
2015 Tank JKU HR, RK 2.5" X-Factor, HD Crossmember, PS Diff Covers, TF HD Hinge and Carrier, Qtec 11500IS Winch, 35X12.5R17 KM2's on AEV Saltas, and Other Assorted Goodies
cbunting24 is offline   Quote
Old 12-19-2016, 04:53 PM   #19
Jeeper
 
Join Date: Aug 2014
Posts: 1,501
2014 JKUR 6MT, Hard top, no towing - 17/59
2015 JKUR Auto, Hard Top, Towing w/4.10 - 17/59
stumblinhorse is offline   Quote
Old 12-19-2016, 05:01 PM   #20
Jeeper
 
JGreen06TJ's Avatar
 
Join Date: Sep 2012
Location: OH
Posts: 5,241
Whichever springs are closest to the line are installed first. Next closest bin are installed second....

I've seen some posts on here where the spring numbers (supposedly) weren't the same from left side to right side. I assume they ran out of 13 on the driver side and installed a 14 or 15 to keep the line moving....
JGreen06TJ is offline   Quote
Old 12-19-2016, 05:22 PM   #21
Jeeper

WF Supporting Member
 
71K5's Avatar
 
Join Date: Nov 2011
Location: Idaho
Posts: 812
My 12' 2dr JK Sport, Hard top, auto, 3.73, a/c, had 14/56 springs before I changed them for 19/60's.
71K5 is offline   Quote
Old 12-19-2016, 05:22 PM   #22
Jeeper
 
WaltA's Avatar
 
Join Date: Sep 2013
Location: 3rd Planet, Sol system
Posts: 9,869
I am sure that they don't simply just grab any old spring that is handy and install that one. Not any more than they simply grab which ever drivers seat is closest, with no regard to type and color.

Part of your order going to D1 status, means that every part is scheduled for your vehicle, and will arrive at the right point on the assembly line just as your vehicle arrives. Lots of computers making sure that each queue has just the right part.

Of course, this excludes errors. We all make mistakes. Someone drops a box of springs, and picks them back up in random order, while the supervisor is in the john.
__________________
Current Jeep:
2014 Wrangler Unlimited Rubicon X
Previous Jeeps:
1999 Cherokee Limited (w/ Up Country)
1987 Wrangler Laredo
[All custom ordered]
WaltA is offline   Quote
Old 12-19-2016, 05:29 PM   #23
Jeeper
 
WhiskeyRanger's Avatar
 
Join Date: Aug 2015
Posts: 1,789
Quote:
Originally Posted by NoGaBiker View Post
But, the "different tolerances and we mix them" argument is not analogous. Because this is not a situation of slightly different tolerances and then picking the best ones. These are individually part numbered different parts, all of which have obviously been intentionally spec'd and ordered by Chrysler with their individual specifications. In other words, it's not as you describe wherein a bunch of springs come in, they're all tested, and some are 392 pounds and some are 396, and the spec calls for 394. It's more like the spec calls for 394 but you order 375s 400s and 425's from your vendor and then grab whichever one comes to hand when a truck comes down the line. Why?
Actually, they did have a bunch of differently numbered parts. The assembly was weighed before they were installed, then the different weight parts that we bought that all had different weights themselves and different part numbers were used to balance the finished assembly. Bearings were also brought in of varying thicknesses and ordered by part number then used the appropriate ones.

How many people who are the original owners of JKUR hard tops are getting lighter springs than people with JK Sport soft tops?
WhiskeyRanger is offline   Quote
Old 12-19-2016, 05:39 PM   #24
Jeeper
 
Join Date: Oct 2016
Posts: 45
The posted payload on my JKU is 850lbs. I weighed mine and it worked out to 870lbs. That is a reasonable error factor so the 17/59s did what they were supposed to. The front was slightly heavier than the rear, again expected. This is not anecdotal. It is also not random. But mine is but one of millions.
__________________
2016 JKU 75th A/T 3.73
Grizzloonly is offline   Quote
Old 12-19-2016, 05:58 PM   #25
Jeeper
 
Hi-Lander's Avatar
 
Join Date: Oct 2016
Location: Athens GA
Posts: 211
I would like to know as well.
My 2017 JKU Sport, loaded with max tow had 17 Front/59 Rear. I swapped them for 19/60's.
My cousin's 2015 JKU Rubicon with the same options had 16/58's.
Hi-Lander is offline   Quote
Old 12-19-2016, 06:26 PM   #26
Jeeper
 
ssinga's Avatar
 
Join Date: May 2014
Location: Alabama
Posts: 1,115
Why does Jeep even have a wide range of spring rates/lengths?

I'll agree that it Does seem quite random.

2012 JKU Sahara
All power options
A/C
Auto
Dual top
Max tow

Had 17/58 springs in it.
__________________
My JKUS Build 2012 JKU Sahara #777,820
ssinga is offline   Quote
Old 12-19-2016, 06:31 PM   #27
Supporting Member

5-Year WF Supporting Member
 
bbortko's Avatar
 
Join Date: Oct 2014
Location: NW Indiana
Posts: 785
My 2015 jku Sahara: max tow, hard top, full power and had 14s & 56s. Only thing heavier would have been a hard rock yet I was in the low end of the range.
bbortko is offline   Quote
Old 12-19-2016, 07:20 PM
Thread Starter
  #28
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
So, options right now seem to be:

a) spring decision is completely random -- boxes of springs are placed by the line, workers grab them at random, each Jeep gets whatever it gets

b) there is some calculus used to decide which Jeep gets which spring set, but it is unknown to anyone who's yet posted in this thread, and it is NOT simply weight of the vehicle and options

c) there is a simple weight metric, but it is disregarded so frequently that in a few hours a handful of people have presented first-hand examples of violations of the weight metric, meaning that maybe Chrysler Engineering is okay but Manufacturing is beneath 3rd World standards.

Does it really matter whether it's a) or c)?
1386570 likes this.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 07:22 PM
Thread Starter
  #29
Supporting Member

5-Year WF Supporting Member
 
NoGaBiker's Avatar
 
Join Date: Mar 2014
Location: ATL, GA
Posts: 5,586
Quote:
Originally Posted by WaltA View Post
Of course, this excludes errors. We all make mistakes. Someone drops a box of springs, and picks them back up in random order, while the supervisor is in the john.
That's an example of a "mistake" we all make?

The sad fact of the matter is, given Chrysler's stellar quality reputation, you may actually be onto something.
__________________
NoGaBiker

Current: Anvil '14 Willys JK 6M, 4.56, G2 rear shafts; Eaton e-lockers, G2 D44 axle up front; 4:1 t-case; RE 2.5" long-arm, 35x10.5" Kenda for Street/37" Interco for Trail;
Previous: Hunter Green '92 XJ Cherokee Laredo 4.0; White 92 XJ Cherokee Limited 4.0; '11 Grand Cherokee Overland Hemi-powered drone
NoGaBiker is offline   Quote
Old 12-19-2016, 07:45 PM   #30
Jeeper
 
05Train's Avatar
 
Join Date: Oct 2016
Location: Maryland
Posts: 248
2016 JKUS 75th Anniversary (so metal bumpers), 3.21 gears, 6-speed, no tow, hardtop - 17/58

I replaced them with 18/59 and red shocks, and the difference is profound.

__________________
2016 JKUS 75th Anniversary - Ticking time bomb/junk 6-speed, completely ineffective 3:21 gears, namby-pamby hard top, too-weak Ace sliders, poseur leveling kit, overpriced Mopar LEDs.
05Train is offline   Quote
Reply

Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 03:02 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC