If your axles look like this, then you have the torsion type of suspension, and IMO, I like this over the leaf spring type.. Just me..
First TT ever was a small 2003 Prowler, yet it had this type of suspension. Never an issue in over 16 years of owning it.. These are the Dexter brand torsion axles.
Got the new Rockwood and it has the same Dexter torsion suspension axles.. I bit higher axles rating of course, since the Rockwood is a heavier TT.. But, in the end, I'll stick the the torsion axles... But, that's just me... ;)
Good luck! Mitch