On my 07 2.4 wireless PowerTap hub, anytime I coast, the cassette starts going nuts. It violently jerks forward about 1/4 of a turn, then back to original position. I replaced the freehub body (actually my LBS did under warranty) and it stopped doing it for about a mile then started back up. I am familiar with how to remove and replace the freehub body but this was under warranty so my LBS did it. This is a campy freehub.
I am no where near home with limited tools (but I will buy whenever I need to if I can resolve this myself) and have a hill climb TT on Sunday. First, if not the freehub body, what is causing this, and secondly, assuming I am not going to be coasting on a 12 mile climb, can I go ahead and race this ? I do not care if I have to take the chain off at the top to get down.