It's called "Death Wobble" and as the name implies, it will scare the bejesus out of you when it happens. My T never did it from the start, but all of a sudden one day I kicked it to go through a light and the front end went nuts. I tightened everything down with an impact, checked my alignment, reset my toe in, and it went away. But at about 70 MPH I now see the front tires starting to slightly hop and I am afraid it is going to return. My plan is to have my front tires rebalanced and check to see if my front shocks are dampening.

My Son had a very serious problem with his T right from the git go. It was so bad we were afraid to drive it. We went back to square one and found his wheelbase was off by 9/16 on one side. His caster was also about 10 degrees and we set it back to 6, his toe in was 3/16 and we put it at 1/16. He also had a bent rim on the back that Coker exchanged which got rid of the hop he was having.

But the biggest offender was his front brakes. We bought an all chrome GM disc brake setup and Mickey from Total Performance told us we wouldn't like it. He was right. It had too much rotating mass and the slightest bump would set the front end off. We replaced the entire front setup with Wilwood discs that weight about 1/4 as much . All of those changes seem to have cured it because he took it out for a test run and really got on it with no problems at all.

Here are the things that can contribute to the problem:

1) Worn parts like kingpin bushings.

2) Loose wheel bearings.

3) Improper toe in (or in some cases, toe OUT.......some cars like toe out)

4) Too much or too little caster.

5) Worn or imbalanced tires.

6) Weak or ineffectual shocks.

7) Axles not being square to the frame.

I would say to start with making sure there is no slop in anything, including kingpins. Then check and recheck your toe in. Then have your tires spin balanced on a sophisticated tire machine, not one like Tire Kingdom uses. I am going to try to find a shop that spins the entire rotating assembly, brake drum and all to do my T.

If the car never did it before but started doing it I would suspect the tires first and worn parts second. You and I are not alone with this problem, if you do a search on the HAMB you will see hundreds of posts of people also having the same problem. Some suggest adding one of those dampers that go between the axle and tie rod, but I can't use them on our T's.

Good luck,

Don