New leaf springs, and associated issue - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-12-2012, 07:47 AM   #1
Jeeper
 
brctitle's Avatar
 
Join Date: Jul 2011
Location: Arlington, VA
Posts: 30
New leaf springs, and associated issue

Hi,
so I finally completed a two-months-long replacement project. Replaced the sagging stock leafs on my '95 4.0L with Pro-Comp, just about the cheapest kit I could find (college student budget). The Jeep stands tall and proud once more.
By the way, since the spring bolts fused to the sheaths inside all eight bushings, I had to cut through them. That was what took so long, since I'm working with a floor lift from Jiffy Lube that is only available Sundays after 4pm. I tried several times to cut the bolts with a sawzall, and it really isn't effective. A 3-inch pneumatic cut-off wheel costs twenty bucks with a ten-pack of blades and takes care of the job in minutes, instead of hours. Go with that, not a reciprocating saw.

So, here's the new issue:
Manual transmission. When I start moving, either forward or reverse, I hear a loud clunk from what sounds like the rear driveline, as soon as I engage the clutch. It also happens when I engine brake. It started happening immediately after I did the lift. Can anyone tell me what's going on, and how to fix it?

brctitle is offline   Quote Quick Reply
Old 03-12-2012, 08:20 AM   #2
Jeeper
 
SandyMushYJ's Avatar
 
Join Date: Nov 2010
Location: Asheville, NC
Posts: 357
When mine did that after installing my springs, I just hadn't torqued the u-bolts down enough. I went with a spec I read on here, though I don't remember what it was, and when I actually put a torque wrench on it, I was surprised how loose they were. Fixed the clunking for me.

__________________
'95 YJ 2.5L, 5-sp, 2.5" lift, 31" Pro Comp MT's

'62 Willys pickup Super Hurricane L6
Original, disassembled and in slow progress.
SandyMushYJ is offline   Quote Quick Reply
Old 03-12-2012, 11:15 AM   #3
Jeeper
 
Mitchness's Avatar
 
Join Date: Jan 2011
Location: Spokane, WA
Posts: 1,180
Same symptoms happened to me when I installed my BDS springs. Turned out the center pin was too long and didn't allow the perch to fully seat. This allowed the axle to rock when under acceleration or braking.
__________________
Quote:
Originally Posted by wmpiehl
Haha, just don't let Mitch teach you how to wheel, he is really scary
Mitchness is offline   Quote Quick Reply
Old 03-12-2012, 11:31 AM   #4
Jeeper
 
brctitle's Avatar
 
Join Date: Jul 2011
Location: Arlington, VA
Posts: 30
Come to think of it, I did use air-impact to replace the u-bolt nuts, so they might be under-torqued. They were somewhat rusted, especially in front, so I didn't want to strip them. Maybe they need replacement. Should be fairly simple to check, though. Thanks! Will inform as I fix it.
brctitle is offline   Quote Quick Reply
Old 03-12-2012, 12:14 PM   #5
Jeeper
 
Timberwolf's Avatar
 
Join Date: Sep 2010
Posts: 863
new hardware is always a good idea when lifting
how high did you lift it?
could be the old u-joints binding
what does your driveshaft angle look like?
Timberwolf is offline   Quote Quick Reply
Old 03-12-2012, 01:43 PM   #6
Jeeper
 
brctitle's Avatar
 
Join Date: Jul 2011
Location: Arlington, VA
Posts: 30
Tightened the u-bolts: front were nice and tight, but I'm amazed I didn't catch that the rear bolts were little more than hand-tight. I took it for a spin and the problem seems solved.
Timberwolf, I wasn't really aiming for much of a lift. The springs are set to add 2.5 inches all around. I guess the old springs were just sagging badly, because overall the rig seems about six inches taller.

brctitle is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
The 6th, Semi-Annual WF So Cal Meet and Greet; A Turdhurlder Production turdhurdler California Jeep Forum 1867 04-08-2012 01:54 AM
New unlimited in Groton MarkBerg Connecticut Jeep Forum 16 03-23-2012 08:41 PM
New to Forum, but longtime Jeep owner pjfargo WF New Member Check In 10 03-15-2012 10:05 PM
Borla Header install 89 YJ 4.2L, gasket question and Idle issue bdr3355 YJ Tech Forum 1 03-13-2012 12:03 AM
Kelly Safari TSR and GY Duratrac same? RPN516 JK General Discussion Forum 16 03-12-2012 02:13 PM



» Featured Product

All times are GMT -5. The time now is 03:25 PM.



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