[Big Zeke]

I am wondering if there are any differences between the different levels of Shimano freehub bodies?
I currently have a Deore rear hub on one of my bikes. The first freehub body lasted about six rides before it seized up. It didn't make any noises or give any signs that it was going to stop working. My LBS got me a new one (Deore level again) and now that one has broken as well (after about 10 rides). The second freehub body is not as tight as the original which refused to budge, but it doesn't work properly. The hub was assembled properly both times so I don't think that over-tightness was a problem. It actually made a cracking noise as I was ascending a bridge prior to refusing to freewheel.
I'm a Clydesdale riding technical terrain but the only freehub body that I've ever broken before was one of the Shimano LX Silent Clutch models. I've never broken an XT freehub body so I was wondering if they are constructed differently?
Is it worth the extra money for the higher end freehub bodies like the LX and XT? I like Shimano but this walking back to the trailhead thing is wearing thin.
I hope that I've been specific enough, your advice would be appreciated.

 

[NRSracer]

if it jut refused to move see if you spoke protector thingy(the plastic disc) if you have one. is preventing it from moving. i found out yesterday that an XT cassette is formed differently and doesn't have much space between the cogs and the spokes.

 

[Big Zeke]

Thanks for the input. The cassette is an LX 8 speed. I don't use the plastic spoke protector so it's not the problem.

 

[acriderguy]

if it is just seizes up then is a problem with the bearings and they are proberly worn out or contaminated by dirt. you can either tear it down and repack it with greese, oir you can get an xt hub, i LOVE mine.

 

[oldfart]

If it made cracking noises before it seized, you probably broke a pawl. The hunks of metal seized it. XT's are better material, better finish and bolt right on. Big guys need stronger stuff.