| Also known as | T4178 |
| Diagram | Fig. 11 — GEARBOX SHAFTS AND GEARS · ref 1 |
| Subsystem | gearbox |
| Listed in parts books | 1971–1972 |
MAINSHAFT,C/R T150 4 SPEED
Four-speed gearbox mainshaft for the T150 Trident, PN 57-4178.
This is the mainshaft out of the four-speed gearbox used on the T150 Trident, listed in our records under PN 57-4178 (also seen as T4178 in older book listings). It's part of the gearbox internals covered under the Gearbox Shafts and Gears section of the parts book, and it appears in catalog listings spanning 1971 to 1972.
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The mainshaft is the shaft that carries the gearbox's mainshaft gears and takes drive from the clutch through to the layshaft assembly and out to final drive. It's a wear item that mostly gets attention during a gearbox rebuild, when bushings, bearings, or gear teeth show enough wear to warrant pulling the whole shaft.
We don't have more detail on this one beyond what's in the catalog record. If you're rebuilding a T150 box, give us a call and we'll confirm this is the right shaft for your gearbox before you order.
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