| Also known as | T1963 |
| Diagram | Fig. 11 — GEARBOX SHAFTS AND GEARS · ref 26 |
| Subsystem | gearbox |
| Listed in parts books | 1965, 1967–1974, 1976–1980, 1983, 1985 |
Pinion sleeve
Gearbox pinion sleeve for the transmission shaft and gear assembly, factory PN 57-1963 (formerly T1963).
This is the pinion sleeve, part number 57-1963, sometimes still found under its earlier factory number T1963 in older parts books. It shows up in the gearbox shafts and gears section, alongside the selectors and starting mechanism components, so it lives inside the transmission housing rather than out on the primary or engine side.
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A sleeve like this rides on a shaft and gives a gear or the kickstart mechanism a true, consistent surface to turn on, taking the wear instead of the shaft itself. This one carries a factory supersession from the older 57-1338 number, so if your parts book lists that figure, this is the current equivalent.
The catalog record spans a long production run, 1965 into the mid 1980s, across a good number of gearbox listings, which tells us it saw use over an extended period, though we don't have a specific model tied to it here. Bring your old sleeve or your parts book reference when you order so we can confirm you're getting the right one for your gearbox.
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