| Also known as | T4051 |
| Diagram | Fig. 10 — GEARBOX SHAFTS AND GEARS · ref 17 |
| Subsystem | gearbox |
| Listed in parts books | 1970–1972 |
HI GEAR NUT T150
High gear nut for the T150 Trident gearbox mainshaft.
57-4051 is the high gear nut for the T150 gearbox, listed in the parts books under GEARBOX SHAFTS AND GEARS. This nut secures the high gear (mainshaft) on the box's output side, keeping that gear and its bearing assembly located on the shaft where it belongs. It also shows up under the older T4051 number, so if you're working from an earlier parts book that's the same physical piece.
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This one is specific to the T150 Trident three-cylinder gearbox as shown in the catalog, appearing across entries from 1970 through 1972. If you're rebuilding a gearbox and pulling the mainshaft apart, this is a part worth replacing rather than reusing once it's been staked or has any thread damage.
Give us a call if you're not sure whether this is the nut you need for your box - gearbox internals vary enough across the range that it's worth confirming before you order.
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