| Also known as | T963 |
| Diagram | Fig. 8 — GEARBOX SHAFTS AND GEARS · ref 9 |
| Subsystem | gearbox |
| Listed in parts books | 1960–1962, 1967–1968, 1970 |
GEAR,L/S 2ND 25T C.R.
Close ratio 25 tooth layshaft 2nd gear for the gearbox internals, also listed under the older T963 number.
Part 57-0963 is a layshaft second gear from the gearbox internals, listed in the parts books as a 25 tooth close ratio gear. It lives inside the gearbox shell on the layshaft cluster, and it's one of the pairs that determines what second gear actually feels like once you're rolling. The catalog carries this under the older T963 designation as well, so if your parts book still uses the letter-prefix numbering, that's the same physical gear.
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This one shows up in the gearbox shafts and gears figure across catalog listings spanning the late 1960s into 1970. Being a close ratio gear, it's not a straight swap with a standard-ratio 2nd gear layshaft part — the tooth count and ratio spacing are different by design, which is the whole point of running a close ratio set.
If you're rebuilding a box or chasing a gear-selection problem, this is a part worth inspecting closely for chipped or worn teeth before you put the cluster back together. Call the shop if you're not sure whether your box was built up with close ratio gears or the standard set — it matters for what you order alongside this one.
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