| Also known as | T1393 |
| Diagram | Fig. 8 — GEARBOX SHAFTS, BEARINGS AND INNER COVER · ref 18 |
| Subsystem | gearbox |
| Listed in parts books | 1964–1970, 1974 |
Low gear bush
A gearbox low (first) gear bush from the GEARBOX SHAFTS, BEARINGS AND INNER COVER assembly, also known as T1393.
The 57-1393 is a low gear bush out of the gearbox internals, listed in the parts books under the GEARBOX SHAFTS, BEARINGS AND INNER COVER figure. Older catalogs list this same part as T1393, the letter-prefix number style Triumph used before the numeric system took over.
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A gearbox bush like this one sits between the low (first) gear and its shaft, giving the gear a bearing surface to run on and keeping things from wearing the shaft itself. It's a wear item — if the gearbox is getting rebuilt or if there's play or noise coming from first gear, this is one of the parts worth checking.
The catalog data we have places it in gearbox work spanning the mid-to-late 1960s. If you're rebuilding a box, bring your gear cluster in or give us the specifics before ordering so we can confirm it's the right bush for what you've got apart.
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