After all these years, there's just no reason for anyone to be exploding a transmission. But...people still do, just like they still stick their foot under a mower, touch a stove to see if it's hot and blow their fingers off with fireworks.

5500-6000 engine RPM with a broken roller clutch is all it takes. Lower horsepower applications can get by with a non-LBA valvebody, IF you drive the car correctly. At higher power levels, you have to apply that band to give the roller clutch some help. And you have to maintain the thing - take it apart once in a while and look at it - instead of running it till it quits. In any race style application, not putting a good drum in the thing is asinine.