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Old 04-14-2012, 12:34 AM
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TJ lifted dw...need a few pointers

I have 2005 TJ 57,000 miles, I have rough country 4" suspension lift Tcase drop springs and lower arms also 3" spring spacers and 3 inch body lift all sittin in 40" ground hawgs....all parts except tires are less than a year old al bought new...new steering stabalizer recent alignment and tires are somewhat balanced...from 30-35 mph i get a pretty good DW...any pointers would be any one can offer would be great...Thanks

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Old 04-14-2012, 09:56 AM   #2
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Help to know when it started. And the somewhat balanced it the 1st place I look. Then the trac bar.
40s on stock axles...... $?????????????

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Old 04-14-2012, 10:22 AM   #3
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Look, no joke....There's tons on confusing advice about DW on the web and also every alignment shop around.

Keep it simple and START with this: First check CASTER on front axle....It MUST be lots less than 7 degrees of stock spec no matter what it does to your pinion angle. Second, check-and I mean really check your track bar to be solidly mounted at both ends with NO slop at either joint. Third, check just as hard all your tie rod ends, drag link ends, and ball joints to be tight as a cat's ass too.

It really is that simple. so look first at those things in that order, but make sure to check them all.

And BTW, DW isn't just a Jeep issue, it happens for the same reasons on all solid axle track bar rigs. What makes it so confusing is owners always fail to check it all and check it properly, and they want to save money, and they look for just one cause, and they listen to asshats who ain't got a clue.

Check youtube...check it for several vids that really go into detail and make it easy for even the least experienced of us to find the problem.
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Old 04-14-2012, 11:36 AM   #4
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A few thoughts...

First, the front pinion angle always takes precedence over the caster angle. While the caster angle is important, the pinion angle is critical. The usual method of producing a good workable caster angle is to increase it until you get front driveshaft u-joint vibration indicating excessive pinion angle, then back the caster angle off until the front driveshaft vibration goes completely away.

So far as DW is concerned, my bet is your "somewhat balanced" 40" tires are the root cause. Improperly/imperfectly balanced tires, especially when they are huge like yours, are the single-most biggest cause of DW. After that, DW is usually a combination of several problems like imperfectly balanced tires coupled with something like a trackbar that has even the slightest amount of side-to-side movement like from a loose mounting bolt, wallowed-out mounting bolt hole, bad bushing, etc.

Anything loose in the front-end can be a contributor to or cause of DW too. Have an assistant turn the steering wheel back and forth, tires on the ground, while you watch the front end and look for any unwanted movement or noises anywhere.

So the first thing is to work on getting your tires balanced. And I'm not so sure you can get 40" tires balanced perfectly so good luck there.

What front and rear axles did you go with that are strong enough for 40" tires? Certainly there is no factory Jeep axle that is even close to being strong enough for that big of a tire.
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Old 04-14-2012, 11:41 AM   #5
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I looked at his pics.
I like the look of the big tires and little lift, just to me the axles looked stock.
Big tires plus heavy turning load will eat a Trac bar up.
That's why I asked WHEN it started it.
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Old 04-15-2012, 06:37 PM
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Yes stock axles for now...dont do much off road yet need to upgrade drivetrain first...was goin for looks first...then functionality
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Old 04-15-2012, 07:53 PM   #7
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Quote:
Originally Posted by olarjeep View Post
Yes stock axles for now...dont do much off road yet need to upgrade drivetrain first...was goin for looks first...then functionality
40" tires on stock axles?
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Old 04-15-2012, 09:05 PM
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was on 35s with 4" lift got the other lift parts free or cheap..traded 35s for 40s so thats just the way it turned out lookin for drivetrain parts now its an everyday driver but not driven very much...wasnt drove last winter at all i have only had it 16 months and only put 9000 miles on it...the picture of the jeep in the shop with all the chrome was when i got it....UGLY...lol
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Old 11-15-2012, 03:35 PM   #9
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Quote:
Originally Posted by olarjeep View Post
was on 35s with 4" lift got the other lift parts free or cheap..traded 35s for 40s so thats just the way it turned out lookin for drivetrain parts now its an everyday driver but not driven very much...wasnt drove last winter at all i have only had it 16 months and only put 9000 miles on it...the picture of the jeep in the shop with all the chrome was when i got it....UGLY...lol
I bet your steering blows! stock gear box, and stock linkage? but to balance offroad tires you should use Balancing BBs
Aggressive Tire Chart

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