I want one of those shock absorbers. I've got two spots where I have to mow up to a gate, then make a tight turn reversal. Have to do this 2-3 times to get it done. The grabby clutch definitely doesn't help. And I suppose what TobyU said is true, once you've had a hydro tranny it's had to go back. Still, I love my JD.Some machines had a "shock absorber" type of damper on the clutch idler pulley mechanism so the belt got tightened more gradually and not jerk the machine when you let up on the pedal,it also dampened any oscillation that developed in the belt due to a hard spot or a kink in it..
Some designs of clutch idlers are just "grabby" by nature it seems...rust on the pulley sheaves can also cause grabbing and wheelies..sometimes the brake might be dragging and that can encourage it also..
I can see where a grabby clutch can be a pain,especially when your doing some tight manuvering and need it to engage smoothly..I have a retaining wall along my driveway about 2 feet high I have to mow next to and I've had a few close calls when my Sears Suburban's brakes weren't working well and the belt liked to grab !..almost went right over the edge a few times..