Youngins........
It was very common. More so with a 727 than a Turbo 400.
The
Clutchflite was an
automatic transmission developed by B&M in the 60s specifically for
drag racing, usually in a Mopar with a
Hemi. In the case of the Mopar version, it was a 727
Torqueflite that had the
bellhousing sawed off. In place of a
torque converter, the
Clutchflite utilized a heavy
flywheel and a
clutch setup. There was a spider assembly to drive the transmission pump. The idea was that you could leave as hard as a stick car, while having the consistency and speed of an automatic. It was used in the 60s because torque converter technology was still pretty primitive, and it was thought that the
Clutchflite would be a good compromise of hard launches, quick shifts (that most drivers couldn't make), and not have the lack of efficiency of a torque converter (
Drive-Through) at the top end.
The
Clutchflite proved to be both unreliable and a safety issue.
The first
NHRA Pro Stock car to try a
Clutchflite was the
Motown Missile.