NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > Modified Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

Reply
 
Thread Tools Display Modes
  #46  
Old October 18th, 2020, 15:31
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Rear Suspension Issues

New stops, one where there was none. Felt good on the street, now to flex, see about bolt interference, and get it on the trail with my usual load.
Thanks for the guidance folks, at least I'm on track now. I think the OME springs are soft for comfort, and it does ride smooth, but I might want a more HD ride. One thing at a time.

Sent from my E6810 using Tapatalk
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #47  
Old October 18th, 2020, 15:34
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Rear Suspension Issues

One more. Stance appearance is due to front fenders cutout more than rear I'd say.

Sent from my E6810 using Tapatalk
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #48  
Old October 18th, 2020, 22:43
Evan03 Evan03 is offline
NAXJA Forum User
 
Join Date: Jun 2017
Location: Idaho
Posts: 650
Rear Suspension Issues

People think mines lifted like 6" due to front fender height.

In the rear im not running bump stops at all.
I am bumped in the front to keep my track bar out of tge oil pan.

Glad your on track.

Sent from my SM-G960U using Tapatalk
Reply With Quote
  #49  
Old October 25th, 2020, 02:05
ShoeterMcgav's Avatar
ShoeterMcgav ShoeterMcgav is offline
NAXJA Member
 
Join Date: Mar 2019
Location: Colorado
Posts: 711
Re: Rear Suspension Issues

What happened to the pic in the other thread and notice of the shackle mount being damaged? No concern?


Evan03, how would a flat (worn) spring cause a smoother ride??? That seems peculiar to me... is the argument is that its softer since its worn?
I'd think that it has lost its "spring" since they don't return to normal U shape. It'd have to be able to reverse arch to even dampen anything? I'd argue its a much worse ride and akin to driving with a board as a spring. His setup worse off than yours, since you have shackles and srbs and mainly because you have bad ass Fox shocks doing the grunt work

I vote both of you change them worn out springs! XD
__________________
97 XJ lift lockers 35s mid arms 9"/hp30 trussed warn hubs wj brakes 1ton OTK 4.56s etc work in progress..
93zj BEAST 35s Claytons LAs 44/hp30 lockers bumpers headers etc $old

Last edited by ShoeterMcgav; October 25th, 2020 at 02:13.
Reply With Quote
  #50  
Old October 25th, 2020, 08:15
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 142
Re: Rear Suspension Issues

There's no difference in stiffness of a new or fatigued metal spring unless the fatigued spring is close to fatigue failure, or if its developed a crack (and therefore is again close to failure). The yield load where the spring takes a new set could go up or down though. Most likely reason for a softer ride with the fatigued spring is that the shackle angle will be greater for the flat spring, and this reduces the effective spring rate.
Reply With Quote
  #51  
Old October 25th, 2020, 09:32
Tim_MN's Avatar
Tim_MN Tim_MN is offline
Freakish Hand Strength
 
Join Date: Mar 2003
Location: Minneapolis, MN
Posts: 7,182
Re: Rear Suspension Issues

The "smoother ride" is not related to metal fatigue which is small cracks that occur just before catastrophic failure and separation of the metal, it is due to geometry. A saggy ( not fatigued ) leaf spring is longer than a similar not sagged leaf spring and the shackle angle is less upright. The closer the shackle is to a vertical angle, the higher the effective leaf spring rate. When the shackle is laid back at an angle, it actually becomes a moving link with the spring, and the spring ride will feel softer.
__________________
.
.

Quote:
Originally Posted by bimmerjeeper


Go ahead and slam the liftgate down on a blanket, and see how long you are laughing.
Reply With Quote
  #52  
Old October 25th, 2020, 18:03
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Re: Rear Suspension Issues

Quote:
Originally Posted by ShoeterMcgav View Post
What happened to the pic in the other thread and notice of the shackle mount being damaged? No concern?

I vote both of you change them worn out springs! XD
I've spent 3 days on a recovery of a Tacoma high in the Ruby Mtns of Nevada. Just checking back in.

I'm not clear on the damaged shackle mount. I haven't removed any pics and don't even know which one was referenced. Also have noticed nothing indicating a damaged mount. Maybe more pictures are in order (but hopefully not of the HUGE variety in this thread.

Met a great bunch of folks during today's recovery. Gang out of Elko that are available day or night, without charge, just notify with details on their FB page and they come out in droves with killer 4x4s.
I might pick their brains and ask them to look over my setup in person for diagnosis and resolution. Not giving up here tho'.

Getting dang cold here suddenly so it's shop heater season.. yuk. 6* tonight with -20 wind chill. Got that Toyota out just in time (it was at close to 10k elevation).
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #53  
Old October 25th, 2020, 18:10
ShoeterMcgav's Avatar
ShoeterMcgav ShoeterMcgav is offline
NAXJA Member
 
Join Date: Mar 2019
Location: Colorado
Posts: 711
Re: Rear Suspension Issues

So a saggy, or dead flat in this case, isn't "softer" than that of a properly set up rear suspension- with U shaped Leaf packs and 45* shackles is what we are agreeing on ya?
__________________
97 XJ lift lockers 35s mid arms 9"/hp30 trussed warn hubs wj brakes 1ton OTK 4.56s etc work in progress..
93zj BEAST 35s Claytons LAs 44/hp30 lockers bumpers headers etc $old

Last edited by ShoeterMcgav; October 25th, 2020 at 20:08.
Reply With Quote
  #54  
Old October 25th, 2020, 18:17
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Re: Rear Suspension Issues

Quote:
Originally Posted by ShoeterMcgav View Post
What happened to the pic in the other thread and notice of the shackle mount being damaged? No concern?

I vote both of you change them worn out springs! XD
I've spent 3 days on a recovery of a Tacoma high in the Ruby Mtns of Nevada. Just checking back in.

I'm not clear on the damaged shackle mount. I haven't removed any pics and don't even know which one was referenced. Also have noticed nothing indicating a damaged mount. Maybe more pictures are in order (but hopefully not of the HUGE variety in this thread.

Met a great bunch of folks during today's recovery. Gang out of Elko that are available day or night, without charge, just notify with details on their FB page and they come out in droves with killer 4x4s.
I might pick their brains and ask them to look over my setup in person for diagnosis and resolution. Not giving up here tho'.

Getting dang cold here suddenly so it's shop heater season.. yuk. 6* tonight with -20 wind chill. Got that Toyota out just in time (it was at close to 10k elevation).
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #55  
Old October 25th, 2020, 18:24
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 142
Re: Rear Suspension Issues

In this photo, the shackle box appears folded:

Reply With Quote
  #56  
Old October 25th, 2020, 18:31
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Re: Rear Suspension Issues

Hmm.. I'll look again but need a 'good' one to compare. Maybe another pic from the side will help?

Thanks.
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #57  
Old October 25th, 2020, 19:59
maxbraketorque maxbraketorque is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: PDX
Posts: 142
Re: Rear Suspension Issues

Quote:
Originally Posted by NOTNSUV View Post
Hmm.. I'll look again but need a 'good' one to compare. Maybe another pic from the side will help?

Thanks.
A side pic might help. The shackle box outboard wall flares open towards the back of the box, but its parallel to the unibody rail starting from the bolt hole and going to the front of the box. Yours looks pretty taco'ed, but it could be he photo angle and fish-eye exposure.
Reply With Quote
  #58  
Old October 25th, 2020, 20:12
ShoeterMcgav's Avatar
ShoeterMcgav ShoeterMcgav is offline
NAXJA Member
 
Join Date: Mar 2019
Location: Colorado
Posts: 711
Re: Rear Suspension Issues

I see it making a Z shape... so that'd be a hellova fish eye!
__________________
97 XJ lift lockers 35s mid arms 9"/hp30 trussed warn hubs wj brakes 1ton OTK 4.56s etc work in progress..
93zj BEAST 35s Claytons LAs 44/hp30 lockers bumpers headers etc $old
Reply With Quote
  #59  
Old October 27th, 2020, 11:52
NOTNSUV's Avatar
NOTNSUV NOTNSUV is offline
You Guys ROCK!
 
Join Date: Aug 2012
Location: Spring Creek, NV
Posts: 432
Re: Rear Suspension Issues

Ok, shackle box is fine. But I'm finding marks on frame, body each side. Longer or boomerang shackle the fix?
__________________
I'm a 'Do-it-Twice' kinda guy.

1999 XJ Sport 4.0L Black
Reply With Quote
  #60  
Old October 27th, 2020, 13:09
TRCM's Avatar
TRCM TRCM is online now
NAXJA Member
 
Join Date: Jan 2007
Location: Newport News,VA
Posts: 1,280
Re: Rear Suspension Issues

Quote:
Originally Posted by ShoeterMcgav View Post
I see it making a Z shape... so that'd be a hellova fish eye!
it's a combination of the shape of the box and the weird angle the pic was taken....
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear Suspension issues XJwheelman Modified Tech Discussion 7 September 27th, 2013 05:36
suspension issues JoeyBottles Modified Tech Discussion 5 July 25th, 2012 18:46
Front Suspension Issues mavrick Modified Tech Discussion 12 December 23rd, 2010 23:09
Front suspension Issues .... hemiriffic Modified Tech Discussion 4 March 15th, 2010 15:48
Suspension Issues... Grant H. Modified Tech Discussion 8 April 4th, 2007 19:38


All times are GMT -7. The time now is 15:20.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014