Flywheel taper

[Bob Culver]

Relieved tapers seem to hold better. Many other make rear axles finished that way. Ford 10s give trouble with loose axle tapers; relieving is the standard cure. It is reckoned tapers often fail by fretting whcih starts at the big end. Releiving increases the pressure and reduces. The later Seven flywheel relief is apparent in some Austin section dwgs.

Ideally at last one shell should drive into the notches, rather than pull against the incline.