It transfers foot selects from the selector shaft to the shift drum.

At one stage Mik clean sheared the gear selector shaft which kept the Hog off the trails for 9 months.

Keech removed the gearbox cover, and found that a "detent spring" on the selector shaft for the third and fourth gears was broken, so he replaced it.

Fig. 4 (above) shows 3rd gear selected by the movement of the mechanism described earlier but this time the 3rd gear has its own set of forks acting on an independent thrust bearing/selector shaft (green).

Gear selector shaft was located in the nose housing, unmodified as in the Beetle set up, facing rear-ward at the tail end of the box in the front-side-back position on a midship engine racing cars.

If you still have a problem with the gear selectors you'll then need to go deeper into the engine, first examine the selector shaft and claw assembly where it engages on to the end of the selector drum.

I had some developing problems with gear shifting, which might have destabilized me enough to have contributed to the spin, but Ian found the problem afterwards and replaced the nylon shim in the gear selector shaft before the race.