Nose Dive - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ 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 03-15-2010, 02:12 PM
Thread Starter
  #1
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
Nose Dive

I bought a used 05 Rubicon TJ with 45k miles, and no signs of it ever being offroad.
When I come to a stop the front end "dives" down quite a bit, is this normal or do I need new springs or shocks.

I took it off road this weekend and it seemed to handle the obstacles just fine, even managed to get all four wheels off the ground, and it "landed" just fine

indosurf is offline   Quote
Old 03-15-2010, 02:33 PM   #2
Jeeper
 
Join Date: Dec 2009
Location: west chester, PA
Posts: 376
maybe it is nose diving because you "landed" one too many times haha, just kidding. My TJ dives a little bit too. Maybe your shocks are a little worn out, but I wouldn't worry about it unless it is really bad. good luck with the new Rubi!

__________________
every time I look at my Jeep I love it more and more
dan188 is offline   Quote
Old 03-15-2010, 03:37 PM
Thread Starter
  #3
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
I am hopeing it is not the springs and a 2" lift kit will cure it. I dont know how many times the previous owner may have jumped it It was my first time. It was coming back from wheeling, into my buddy's parking lot. No other cars or people around, at least a solid foot off the ground with a smooth landing
indosurf is offline   Quote
Sponsored Links
Advertisement
 
Old 03-15-2010, 04:29 PM   #4
Jeeper
 
snwchris's Avatar
 
Join Date: Jan 2009
Location: NE Ohio
Posts: 1,718
Do you have a winch on the front.... My jeep tends to dive a little since having a winch on the front.
__________________
98TJ / Hi-Lined / Zip Lockers / 35s


Family Rig / Tow Rig: 08 Tundra & 16ft Trailer
snwchris is offline   Quote
Old 03-15-2010, 07:30 PM   #5
MOz
Jeeper
 
MOz's Avatar
 
Join Date: Apr 2007
Location: Poconos
Posts: 2,483
Check your shocks (post a pic of both)... Look closely for leaking fluid. If they look wet, chances are you lunched them. Test the shocks. If you push down real hard on the front end and let go, the Jeep should just rise and stop. If it bounces, then you know you have bad shocks. IMO - get a set of Rubicon Express monotube shocks. They are awesome!

If your shocks are ok, then it might be front end sag. JKS has some good excellent adjustable coil spacers to compensate when you add aftermarket bumpers and/or winches on the front end. Front end sag is visually noticeable... post a picture and we can get a better look.
__________________


It ain't no fun unless you get some of it on you.
MOz is offline   Quote
Old 03-15-2010, 10:40 PM
Thread Starter
  #6
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
Should it be stiff under hard braking, because it really dives down (prior to me jumping it).

Should I do the springs? Can I do springs to raise it 2" instaed of the spacers?
indosurf is offline   Quote
Old 03-16-2010, 12:07 AM   #7
Jeeper
 
bjtoth's Avatar
 
Join Date: Mar 2010
Location: Lafayette IN
Posts: 87
If you punch the brakes and dips very quickly, probably weak shocks. If it dips further than it should, But not more quickly than normal, i'd say weak springs. Give your front end the old bounce test. Should return to center with one or no oscillation. If springs are weak, it would sit lower at a stop as well, like extra weight on the front. If you hit and hold your brakes and your front dips initially further than it settles, shocks bad(watch your headlights on road at night). Hope this helps.
bjtoth is offline   Quote
Old 03-16-2010, 12:14 AM   #8
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
mine does take a slight nose dive and to the right = )
terrible2 is offline   Quote
Old 03-16-2010, 12:34 AM   #9
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 48,584
My first thought indosurf is you have bad shocks.
__________________
When you have a choice, buy American.
Jerry Bransford is online now   Quote
Old 03-16-2010, 12:56 AM   #10
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
Quote:
Originally Posted by Jerry Bransford View Post
My first thought indosurf is you have bad shocks.
Thats what people presumed on mine, Im also guessing it is shocks.
terrible2 is offline   Quote
Old 03-16-2010, 10:43 PM
Thread Starter
  #11
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
Agreed, thanks all. Did the bounce test and it failed. Going to go with the Rubicon shocks, and the 2.5" spacers. Unless someone can suggest something better in that price range.

Terrible2 sounds like shocks and brakes for you if it is pulling to the right.
indosurf is offline   Quote
Old 03-17-2010, 01:38 AM   #12
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
Shocks and Pitman Arm I believe. As for the shock test, I tried it but I wasnt heavy enough to put considerable weight on the front end. Actually i just realized i can try jumping on the bumper
terrible2 is offline   Quote
Old 03-17-2010, 02:06 AM
Thread Starter
  #13
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
I gave mine the roof rack rocker test. I grabbed the roof rack and rocked the jeep left to right, and it just kept on rocking.
indosurf is offline   Quote
Old 03-17-2010, 03:14 AM   #14
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
I think thats supposed to happen do to your springs? Or am I wrong. I do remember my friend rocking my jeep back and forth, if you do shake it horizontally like that I dont know if it'll measure the shocks the way you like. Either way if your shocks are broke or not, buying good shocks would definitely improve the comfort of the ride.
terrible2 is offline   Quote
Old 03-17-2010, 11:13 PM
Thread Starter
  #15
Jeeper
 
Join Date: Jan 2010
Location: California
Posts: 168
Hmmm, I wonder....., sounds like you are right. I think I might go with the Rough Country 2" lift kit as it comes with springs.
indosurf is offline   Quote
Old 03-18-2010, 01:06 AM   #16
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
I hear RC springs are hard as in bad ride. shell out the money for RE monotube or the Bilstein 7100 I believe
terrible2 is offline   Quote
Old 03-18-2010, 02:23 AM   #17
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Are you sure your rear brakes are working?

Try driving on smooth flat dirt, then slam on the brakes. Both ends should slide.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote
Old 03-18-2010, 02:53 AM   #18
Jeeper
 
Join Date: Oct 2009
Location: San Diego
Posts: 759
Quote:
Originally Posted by rrich View Post
Are you sure your rear brakes are working?

Try driving on smooth flat dirt, then slam on the brakes. Both ends should slide.
You know, I did hook up the axles myself and no one really double checked, but I do know that I bled out my brakes and tightened down the E-brake via the rear tires.
terrible2 is offline   Quote
Old 03-18-2010, 04:38 AM   #19
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
That still doesn't mean they work. Even things like a Master cylinder bypassing could prevent them from working, or putting enough pressure to the rear to stop.

A severe nose dive happens if the front brakes do all, or most of the stopping.

Even with shocks totally removed increased nose dive is just barely noticeable.

Shocks don't do much on compression - they are there to control rebound.

Try it -- they compress relatively easy compared to the effort needed to expand them out again. Gas shocks just make that test a little harder, but the gas pressure really doesn't lift it much. The nitrogen gas is just to prevent bubbling and fade.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote
Old 03-18-2010, 04:54 AM   #20
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
It could be the rears weren't adjusted properly. It's important.
The rear shoes have to travel a little before they touch the drum. The "hold off" valve in the proportioning (combination) valve can only do so much. Too loose in the rear lets the front discs do all the stopping.

When adjusting with the E brake - back off the E brake cable so it's loose. Then adjust the linings. Tighten them until the wheels won't spin or spin hard. Have someone step on the brake pedal, then release. Notice it may not now be tight! If the shoes weren't centered, they may have been dragging making you think they were tight. Keep doing it till stepping on the pedal doesn't make them loose again - now they are tight!

After it's tight, back off 2 or 3 clicks, it will still feel tight. Step on the pedal and release - that centers the shoes again. Wheel spins OK now? If not, do it again, then step.

Important -- Have the helper step on and release the pedal after every little bit of adjustment. - that keeps the shoes centered. Otherwise you'll get them too loose.

After the wheels are properly adjusted adjust the E-brake cable to take up the slack but not pull.

Seems like adjusting drum brakes properly is a lost art.

It's possible by not doing it like that you have the shoes adjusted out too far - then the shoes don't make contact until long after the fronts do the stopping == giving you the dive!

__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
'92 TJ wont start, makes fast clicking nose orangecitcat TJ Tech Forum 11 11-29-2006 12:43 AM





All times are GMT -5. The time now is 08:26 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, 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 © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.