Originally Posted by rbwamsley
If the Jeep has a vibe around 70 mph, would you suggest getting an SYE?
Also, is it ok to run a 2" spring spacer? That kind of seems like a lot.
If it's not lifted, then no, you don't need an sye. They can have vibes for a whole list of reasons, but on a mostly stock jeep I'd start with these three steps:
1) Do an alignment. Only takes a few minutes to do yourself. Here's directions on how to do it:
2) I see you just rotated your tires. Did that alter the vibe at all? Having your tires balanced would be a good idea.
3) Measure the spacers above the coil springs. 1.75" to 2" are the most common aftermarket mods and it is possible to get vibes after adding them. If they are that size, it is possible the t-case would need to be lowered slightly.
As far as the spacers, yes it is fine to use them. It is a very inexpensive way to get a couple inches of lift (or in your case replace the worn ones).
Don't just remove the spacers that are there, as the springs hitting metal is not a great idea.