i got a death wobble on a 97 sidekick. i have the Sidekick Extreme Duty Idler Arm. the sidekick has the 3in lift kit from calmini
 

What size tires? have you checked the steering linkage yet?

Wild

32 and i have put 2 used  center links in. balance all the tire

Alignment? Had it checked?

It's the center link, the problem is it want's to rotate and causes
the truck to dart from side to side when the tire hits something, as
far as the wobble, I've never had that happen, but if the link is worn
enough it could I guess. The alignment could be the problem too,
depending on the road surface as it pulls left and right.

How much and what kind lift do you have?

Wild

We added a steering brace for the passenger side on Project Trouble, not sure if this is what wildgoody is referring to as going bad:

No, the center link is what the tie rods connect to, but you
have a valid point, if the idler is loose it could cause problems to.

You might want to have someone crank the steering wheel left
and right while you watch the steering parts for odd movement

Wild

i have the calmini kit and i have brace the sky arm. the Alignment was OK the last time i check.

i was thing of making  a custom steering links using rod ends