| Also known as | T4363 |
| Diagram | Fig. 11 — GEARBOX INNER COVER AND SELECTORS · ref 13 |
| Subsystem | gearbox |
| Listed in parts books | 1971–1974 |
Operating quadrant
A gearbox operating quadrant used in the selector mechanism, including the optional 5-speed gearbox setup, later superseded by 57-7019.
The operating quadrant, part number 57-4363 (earlier books show it as T4363), is a gearbox internal that lives in the selector mechanism inside the inner cover. It shows up across gearbox figures covering the gears, shafts, selectors, and starting mechanism, and it's specifically called out in the parts required for the optional 5-speed gearbox setup, including the T150V five-speed gearbox shafts and gears figure.
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This part works as part of the shift linkage that translates movement at the gear-change lever into the selector motion that actually moves the gear pinions on their shafts. Because it's tied to the 5-speed conversion parts list as well as showing up in the standard selector figures, it's worth checking your gearbox configuration against the parts book before ordering to make sure you've got the right quadrant for your setup.
Our records show this number was later superseded by 57-7019, so if you're chasing this part under a newer parts book or a supplier catalog and it's not turning up under 57-4363, that's the number to look for. Catalog appearances for this part run from 1971 to 1974.
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