Okay, here goes. I have a fully stock 07 2-door X that I just bought a month ago from a dealer. Now, anyone who knows Michigan, knows that our roads are the best in the nation - not. So, I'm driving along on the highway, cruise set at 70 (I'm not embellishing or diminishing my speed) and I come across a section of highway that has been patched. In the process of winter, the patches themselves have become quite bumpy. I hit one of these bumps and my front end starts jiggling and dancing. The only way to get the front back under control is to slow to 55-60 mph.

In installing my new 17" Moabs yesterday, I notice the front driver-side spring appears to be new and still has a VERY legible tag on it indicating the part number, etc.

I'm thinking that the front spring(s) were replaced and that they aren't the right springs.

Your thoughts or solutions to my problem are appreciated!!

 

All of our original springs have part number tags on them. Check your ball joints and steering stabilizer for wear.

 

Could have been previously lifted and returned back to stock when traded/sold. Check front ball joints for play and make sure front steering components are all torqued correctly.

 

Read this;

https://www.jk-forum.com/forums/show...s-and-Wobbles&

Take care of it A.S.A.P. It sounds like you had a shimmy versus full on death-wobble (DW normally doesn't cease until you come to a full stop) but you should still address the problem before it worsens or damages your suspension.

 

A bad shock will cause the tire to ''bounce'' on the road surface. This can be very unsettling. It continues as long as the road surface is rough. Eventually the tread pattern on the tire will ''cup''. Check the bounce on the front end by rocking the Jeep on each corner and observing the rate of bounce. You will see a difference if this is the problem. A good shock = almost no bounce on return to level. A bad shock = multiple bounces before stopping at level. Also check all bolts and bushings in the front end for tightness.

 

See, I thought shock as well. But when I go push down on the front corners to check, the front doesn't budge at all. I'm 300 lbs. I can MAKE a suspension move if I want to... and she doesn't move a bit.

I did read on the Death Wobble link that different wheels/tires can make a difference. I just ditched the stock 16" steelies with Hankook DynaPro AS tires (looked like car tires instead of light truck tires) for the 17" Moabs with the stock Wrangler RSA's. Maybe that'll help?

 

You're saying the front suspension doesn't move at all? Does it ride like a log truck? It should compress when you push down on the front end.

 

I ran into the same situation as the OP and found that the trackbar bushings and ball joints are still good as new so I determined it's the stabilizer. Got the Teraflex HD stabilizer from Northridge and after taking the stock stabilizer off, sure enough, there was a leak inside and burping inside whenever i pushed the rod in.

Definitely take your stabilizer off and test it with your hands. the stock stabilizer is wayyyyyyy too small for our JK!

 

I had something a little similar, didn't happen at high speeds but it did at around ~30. My wheel would shake back and forth pretty bad after a simple ripple in the road. I took my OME shocks off and put my old RC shocks back on - Problem solved. I also checked my ss since I was in a warm shop and it might as well not even be on there. It has zero resistance and I will be ordering a new one this week, but it wasn't the cause for the issue.

 

I was told by a local mechanic who specializes in jeeps that the track bar on 07 and up JKs is a huge problem. He said even if there is no play or ovaled holes that 90 % of the time they are the cause. If you dont correct the problem, then trust me it WILL get worse