Why are Sway and Trac bars not needed - JeepForum.com

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post #1 of 19 Old 02-06-2010, 11:25 AM Thread Starter
general
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Why are Sway and Trac bars not needed

I don't have mine on but due have a darting problem. I just would like to know the mechanics of why they are needed or not.
thanks

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post #2 of 19 Old 02-06-2010, 11:30 AM
YYJ87
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Quote:
Originally Posted by general View Post
I don't have mine on but due have a darting problem. I just would like to know the mechanics of why they are needed or not.
thanks
Track bars keep the axles centered under the jeep

sway bar is a giant spring that is connected the body and both sides of the front axle keep body roll and flex to a minimum.


Have you had an alignment/caster and camber adjustment? The lift would change both, a drag link that's on a steep angle will cause bump steer/darting. The larger the angle the smaller the bump needs to be.

How do your ball joints, tie rod ends, drag link ends and steering box feel for play? Worn steering parts and a drag link with a good lean will make for a scary ride!

Also make sure your u-bolts are tight along with your shackles. When i did my lift i torqued them to recommended by the instructions and a week later they were no where near snug enough! (directions said to re-torque and I'm glad i did!)



yyj
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post #3 of 19 Old 02-06-2010, 11:53 AM
giggityjeeper
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Quote:
Originally Posted by YYJ87 View Post
Track bars keep the axles centered under the jeep
And are not needed cause your springs do it for you, on a TJ, they use coils so trac bars ARE needed, nothing to hold the axles form going side to side....

Quote:
Originally Posted by YYJ87 View Post
sway bar is a giant spring that is connected the body and both sides of the front axle keep body roll and flex to a minimum.
is not needed, really on either, just gives you more body roll.....


Quote:
Originally Posted by YYJ87 View Post
Have you had an alignment/caster and camber adjustment? The lift would change both, a drag link that's on a steep angle will cause bump steer/darting. The larger the angle the smaller the bump needs to be.

How do your ball joints, tie rod ends, drag link ends and steering box feel for play? Worn steering parts and a drag link with a good lean will make for a scary ride!

Also make sure your u-bolts are tight along with your shackles. When i did my lift i torqued them to recommended by the instructions and a week later they were no where near snug enough! (directions said to re-torque and I'm glad i did!)



yyj

Started with some rust repairs ended in a SOA...

http://www.jeepforum.com/forum/f12/h...-jeep-1050879/

family roll bar swap/upgrade..

http://www.jeepforum.com/forum/f12/f...grade-1054753/

1990 YJ. SOA, OME 36R 3.5" lift springs, OME 5/8 greasable shackles, OTT high steer, Custom cage, team Rush, Posi, 33 TSL swampers
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post #4 of 19 Old 02-06-2010, 12:00 PM Thread Starter
general
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thanks

Quote:
Originally Posted by giggityjeeper View Post
And are not needed cause your springs do it for you, on a TJ, they use coils so trac bars ARE needed, nothing to hold the axles form going side to side....



is not needed, really on either, just gives you more body roll.....
So the sway bars and track bars not being there only will put more stress on the spring bushings not actually make a diff in driving characteristics?
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post #5 of 19 Old 02-06-2010, 12:13 PM
YYJ87
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giggityjeeper, The sway bar prevents body roll (i think thats what you ment) track bars (proper length for lift) will give you more stability, but not much. the difference between track bars on and off is really dependent on the condition of your bushings, the type/length of shackles and leaf spring quality/style/height. A split shackle wont provide the stability that a shackle with a welded brace will(split flexes beter). A long shackle will also hurt your stability.

Sway and track bars were put on the jeep for a reason, Everyone on here will argue that there is no need to have them they do nothing! They are wrong, you wont realize the true difference untill you try to swerve (I mean swerve HARD)at high speed or get the truck sideways on bare pavement. If you end up in either or both of the above stated without sway and track bars, GOOD LUCK!

Mine are off by the way.




yyj

Last edited by YYJ87; 02-06-2010 at 12:20 PM. Reason: My typing sucks today
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post #6 of 19 Old 02-06-2010, 12:53 PM
pasinbuy
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Quote:
Originally Posted by YYJ87 View Post
giggityjeeper, The sway bar prevents body roll (i think thats what you ment) track bars (proper length for lift) will give you more stability, but not much. the difference between track bars on and off is really dependent on the condition of your bushings, the type/length of shackles and leaf spring quality/style/height. A split shackle wont provide the stability that a shackle with a welded brace will(split flexes beter). A long shackle will also hurt your stability.

Sway and track bars were put on the jeep for a reason, Everyone on here will argue that there is no need to have them they do nothing! They are wrong, you wont realize the true difference untill you try to swerve (I mean swerve HARD)at high speed or get the truck sideways on bare pavement. If you end up in either or both of the above stated without sway and track bars, GOOD LUCK!

Mine are off by the way.




yyj

Hmmmm, someone that knows more than anyone else... I remember when my kid knew everything.. I went to him allot to get advise
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post #7 of 19 Old 02-06-2010, 12:54 PM
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Hmmmm, someone that knows more than anyone else... I remember when my kid knew everything.. I went to him allot to get advise
Sorry I was being sarcastic, I take it back there is no reason for it.
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post #8 of 19 Old 02-06-2010, 01:30 PM
YYJ87
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Quote:
Originally Posted by pasinbuy View Post
Sorry I was being sarcastic, I take it back there is no reason for it.
i think i may be confused.........


wheres my beer?


yyj
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post #9 of 19 Old 02-06-2010, 01:34 PM
YYJ87
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Quote:
Originally Posted by pasinbuy View Post
Hmmmm, someone that knows more than anyone else... I remember when my kid knew everything.. I went to him allot to get advise

Ok........ NOOOOOOOWWWWWWW i have it! LOL i didnt read your first post.


What is your imput pasinbuy?



im going to stop posting for the day now, its my first sat off in 4 months.


yyj
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post #10 of 19 Old 02-06-2010, 01:43 PM
bulrokyj
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So would you all agree that taking the track bars off is ok but you should leave the sway bars on?
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post #11 of 19 Old 02-06-2010, 01:47 PM
postaldave
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the tracs keep the axle from shifting side to side. not really needed and not a big deal anyway if they were since you are on leafs.
the sway on the otherhand imo is needed on the street because it limits body roll in corners. leaf or not it's a safety issue and are safer on the street. discos them for offroad.
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post #12 of 19 Old 02-06-2010, 01:47 PM
YYJ87
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Quote:
Originally Posted by bulrokyj View Post
So would you all agree that taking the track bars off is ok but you should leave the sway bars on?


good luck!


yyj
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post #13 of 19 Old 02-06-2010, 01:50 PM
adhdlacrosse16
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anybody know if removing sway or trac bars is illegal in any state?

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post #14 of 19 Old 02-06-2010, 02:07 PM
MOjeeps
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cant answer your q. but I had darting problems after the lift install. With lift shackles in the front you will have to have the caster angle adjusted. Go to a shop that will measure all angles and get it right, Les Shwab had no idea how to do it correctly. thats my experience, hope it will help you out. Now drives 100% better and only a 100$ to shim it, and realign
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post #15 of 19 Old 02-06-2010, 07:28 PM Thread Starter
general
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Quote:
Originally Posted by MOjeeps View Post
cant answer your q. but I had darting problems after the lift install. With lift shackles in the front you will have to have the caster angle adjusted. Go to a shop that will measure all angles and get it right, Les Shwab had no idea how to do it correctly. thats my experience, hope it will help you out. Now drives 100% better and only a 100$ to shim it, and realign
from what I've heard shims in the front will only correct pinion angle not caster. To CORRECTLY adjust caster you have to grind off welds from the axle tube and the knuckle yokes rotating them to 6-7 deg +. So I'm curious, are you sure that all they did was shims?
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