Front end bounce - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 12 Old 06-02-2015, 01:13 PM Thread Starter
Wheeler
 
FlatlanderWB's Avatar
 
Join Date: Aug 2014
Location: Grand Island, Nebraska
Age: 73
Posts: 28
Feedback: 0 reviews
Front end bounce

I have a 2 door 2014 JK with 2.5" Rock Krawler lift and their recommended Bilstein shocks. I'm running 37" BFG Krawlers at about 5psi on the trails. The setup works great around town (at closer to 30 psi) and highway and fine on the trails except in one situation. If I'm on a steep slope and have to use momentum to get up it and hit a small ledge the front end comes up off the ground. I've experienced this same problem with other 4X4s and other lifts. What if anything can I do to mitigate this problem? I'm not trying to do it on a budget I would even go to coil overs if that would help. I'm getting ready to go to a 4.5" lift so would like to address this problem at the same time.

Thanks,

Wayne
FlatlanderWB is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 06-02-2015, 02:00 PM
Wheeler
 
JKUWarthog's Avatar
 
Join Date: Dec 2012
Location: Baton Rouge, LA
Age: 30
Posts: 62
Feedback: 0 reviews

Longer wheel base

"Nothing in this world can take the place of persistence.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent.
The slogan "press on" has solved and always will solve the problems of the human race” -Calvin Coolidge
JKUWarthog is offline  
post #3 of 12 Old 06-02-2015, 02:24 PM
Rock God
 
Join Date: Jun 2011
Location: Delray Beach, FL
Age: 45
Posts: 768
Feedback: 1 reviews

If you have a lot of weight on the back try lightening the load. Full size spare with bead lock, tire carrier, heavy bumper, extra fuel, high lift, etc. If you have all of those then your front end will come up very easily. If you have none of those, then more wheelbase as has been posted.

Btw I would think more lift will make it worse not better...
Biginboca is offline  
Sponsored Links
Advertisement
 
post #4 of 12 Old 06-02-2015, 03:22 PM
Granite Guru
 
elusive's Avatar
 
Join Date: Dec 2010
Location: temecula, ca
Age: 46
Posts: 356
Feedback: 0 reviews

its from the short arm suspension.
hard to fix cheaply.
elusive is offline  
post #5 of 12 Old 06-02-2015, 03:55 PM Thread Starter
Wheeler
 
FlatlanderWB's Avatar
 
Join Date: Aug 2014
Location: Grand Island, Nebraska
Age: 73
Posts: 28
Feedback: 0 reviews

I'm looking at the 4.5" Rock Krawler X Factor Long Arm System. Are there any front shocks or coil over systems that might help?
FlatlanderWB is offline  
post #6 of 12 Old 06-02-2015, 05:37 PM
Granite Guru
 
Join Date: Nov 2009
Location: Colorado
Posts: 460
Feedback: 0 reviews

Suck down winch?
GreenJK is offline  
post #7 of 12 Old 06-02-2015, 06:49 PM
Comfortably Numb
 
RubiCajun's Avatar
 
Join Date: Dec 2008
Location: Louisiana
Posts: 12,289
Garage
Feedback: 1 reviews

Attached Images
 

08 Rubi Unlimited named Freebird

Quote:
Originally Posted by StubEXrube View Post
Cat killing would almost certainly decline if we were allowed to hunt liberals.
Asylum media group llc all rights reserved ©2015
RubiCajun is offline  
post #8 of 12 Old 06-02-2015, 07:23 PM
Super Moderator
 
j3ff3ry_j33p's Avatar
 
Join Date: Jul 2012
Location: Nashville
Posts: 5,903
Garage
Feedback: 1 reviews




or stretch that wheelba$e....


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
j3ff3ry_j33p is offline  
post #9 of 12 Old 06-03-2015, 03:16 PM
Rock God
 
Monster Jk's Avatar
 
Join Date: Aug 2010
Location: Greeley Crawlarado
Age: 32
Posts: 1,846
Feedback: 23 reviews

I have the RK 2-5/8" coilovers and they took all the roll out for me. I even have an antirock kit in the front. Sorry for the large pic
Attached Images
 

Rescue Green 2008 Sahara Unlimited; RK 3.5 max travel; 37" Toyo Mt; PSC Brawler lite front bumper; PSC rock brawler rear w/ tire carrier; OR-Fab rock guards; Aev hood

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Monster Jk is offline  
post #10 of 12 Old 06-04-2015, 05:53 AM
Granite Guru
 
Join Date: Jun 2010
Location: Brisbane, Australia
Age: 32
Posts: 346
Feedback: 0 reviews

It is just weight transfer plus a bit of twist from rear axle torque. A 4 door will be slightly less prone to lifting the front end but basically even with long arms or a longer vehicle this will still happen if you give it enough berries when going uphill.

I found firmer rear coils (and i guess a firmer rear swaybar) can help slightly but the reality is that the Jeep wants to lift its front left wheel under acceleration even on flat ground, so the best way to handle the issue is to drive while knowing it will lift from that corner first.

ex: RHD JK 2dr CRD auto
now: RHD JK 2dr Rubicon 3.8 6spd
CRDTom is offline  
post #11 of 12 Old 06-04-2015, 06:20 AM
Granite Guru
 
Join Date: May 2014
Age: 37
Posts: 201
Feedback: 0 reviews

I may be off on my term, but sounds like your suspension is unloading or having "push off". I know I read about this a while ago when researching ORI struts that supposedly DONT do this.
rjacobs is offline  
post #12 of 12 Old 06-04-2015, 06:27 AM
Granite Guru
 
Join Date: Nov 2011
Age: 26
Posts: 132
Feedback: 0 reviews
Send a message via Skype™ to jlagross

when you go to the x factor, you will have all 4 control arms and be able to extend the wheel base a bit even with short arms (not much but alittle). This will help.

what other "armor" do you have? do you have a winch?

From personal experience, i have a 2.5 inch max travel, and heavy rear with tools and bumper/spare , but with the weight of my flares , bumper , and winch up front, i park on a hill nightly and dont have any issues.
jlagross is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK 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:
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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome