Violent Take-Off Shudder

the snubber was just flopping with the clutch grabs. My vote is for the clutch replacement. Snubber should be like 1" at rest to do any good on the strip. Imagine that snubber holding still and reducing the overall shudder and you only have -2.5 down? Id go 5 down on the pinion angle in relation to the output shaft as its gonna wind up to maybe 0 under load, depending on what spring rate you have. If you do use a snubber riding on the floorboard, the shudder will stop because the rear end will no longer load and unload with the clutch chatter, it will be solid. It may cure the shudder but youll be riding a buckboard with that pinion hitting the floor over every bump and youll probably end up breaking a perch or something.