The reason I pulled it apart was due to the gear noise at road speed. I would guess that the forward shim being beat out was the root cause of that. But, believe it or not, the Sure Grip worked good, even with drag radials. It pulled both tires. Now, it would pop on some corners, especially going slow and turning tight, like backing into a parking place. But I have had that before on rears and just figured I needed more clutch lube in it.
