Joseph Donnelly
TDR MEMBER
It is not reasonable to criticize a clutch when you haven't seen what failed. Could be pilot bearing, throwout bearing, or the spring might have given up. That is the only part that was reused as it was clear everything else was destroyed by sled pulling extreme abuse. While you are at it, why not criticize the Mitchell clutch too? It didn't just fail, it EXPLODED over the weekend. Some innocent fans had to duck to avoid flying shrapnel. Not bashing, just what happened. Sure glad I wasn't in the way 
It's one's privilege to discount dyno testing. So did NASCAR drivers before Lawrence educated them.
Everyone here should be old enough to realize that any parts used in sled pulling have VERY limited lifetimes.
Roughness on takeoff can be minimized by taking off in first, or by lessening the rpm difference between engine and trans as you engage the last bit.

It's one's privilege to discount dyno testing. So did NASCAR drivers before Lawrence educated them.
Everyone here should be old enough to realize that any parts used in sled pulling have VERY limited lifetimes.
Roughness on takeoff can be minimized by taking off in first, or by lessening the rpm difference between engine and trans as you engage the last bit.