| Diagram | GEARBOX SHAFTS, BEARINGS AND INNER COVER |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
Mainshaft High Gear (20T)
A 20-tooth mainshaft high gear used inside the gearbox.
This is the mainshaft high gear, a 20-tooth gear that lives inside the gearbox on the mainshaft. It shows up in the parts book under the gearbox shafts, bearings and inner cover section, which puts it right in the heart of the transmission where the shafts, bushes, and selectors all come together.
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The tooth count is called out plainly in the catalog record - 20 teeth - so that's a detail you can count on when matching this against what's currently in your gearbox. Beyond that, our catalog entry for this one is brief, showing up in just a single listing, so we don't have a lot of extra detail to pass along.
If you're rebuilding a gearbox and pulling gears for inspection, this is one to check for wear on the dogs and teeth before putting it back in. Give the shop a call if you want to confirm this is the right gear for what you're working on.
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