2 views: first, I raced a Mustang early 70's with an aluminum bell, 13.85 quarters, never a problem.
other side, while enjoying the pleasant employment with Uncle Sam, I had a M113 armored personnel carrier, loose the shaft between the final drive and the transmission, kind of like losing a drive shaft. It was located right in front of the driver.
It tore through the hull, sliced open the abdomen of the driver, broke a leg of the gunner, and when the track turned onto it's side (driver had lost interest in controlling it), I ate the .50 cal barrel and lost 4 teeth.
The examination of the failure showed the mechanics had reused the locking tabs on the connecting bolts, instead of using new ones, kind of like the locking tabs on the exhaust manifold on a 1965 289 engine.
Quite a mess.
ed ay +3112
1968 GT500 Arrest Me Red (The Big Boy Toy)
1966 K Code Vert (The K 'Vert)