Body swaying?

Just drove my XJ for the first time after my RE lift install and am very pleased that theres no vibes and the ride is pretty good. But it seems that even going straight, the rear seems to sway back and forth. Is it just my imagination, is it normal, or something I'll just get used to???

Thanks

You need to provide more info.

1) Specifically list all lift parts installed and the lift height.
2) Is the front sway bar hooked up ?
3) Did you change tires ?
4) What is your tire pressure ?
5) Did you change shocks ? What kind/brand ?
6) Did you get an alignment after the lift?
7) What is the condition of the steering parts ?