Cassette body?

[Mudpuppy]

My hub no longer catches. I can spin the cranks either way and they spin freely.

What do you think the problem is?

The bike shop told me I needed a new cassette body or something.

How hard is it to buy one and install it myself?

Are there any special tools I would need?

Thanks for the help.

[WTGPhoben]

you need a new freehub body. To replace it (assuming you don't have a strange hub) you need to remove the rear axle and then there is a 12mm (or at least i think its 12) allen key that the axle went through. You just unscrew that and the freehub body comes right off

[Mudpuppy]

Ok that sounds within my abilities. :D
It is an xt hub.
Will I need to remove the cassette or anything?

[WTGPhoben]

yeah, the cassette cap actually screws into the freehub body, so If you're chnging the freehub, you're going to need to take off the cassette.