| Also known as | T4628 |
| Diagram | Fig. 10 — GEARS — SHAFTS — SELECTORS — STARTING MECHANISM · ref 4 |
| Subsystem | gearbox |
| Listed in parts books | 1973 |
MAINSHAFT HIGH GEAR ASSEMBLY
Mainshaft high gear assembly for the gearbox, catalog number 57-4628 (formerly T4628).
This is the mainshaft high gear assembly, catalog number 57-4628, also listed under the earlier T4628 designation. It shows up in the gearbox shafts and gears section of the parts books, riding on the mainshaft inside the transmission where it handles top gear engagement.
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As a high gear assembly, this piece works alongside the rest of the mainshaft cluster and selector mechanism to put the box into its tallest ratio. If you're rebuilding a gearbox and finding wear or chipped teeth on the existing high gear, this is the part number to have on the bench.
Our catalog record ties this to 1973 appearances, so if you're working on a different year gearbox, give us a call and we'll confirm it's the right piece before you order.
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