| Also known as | T1652 |
| Diagram | Fig. 5 — GEARBOX SHAFTS AND GEARS · ref 9 |
| Subsystem | gearbox |
| Listed in parts books | 1963–1964 |
GEAR M/S 4TH 25T T20
Mainshaft 4th gear, 25 tooth, for the Triumph T20 gearbox, part number 57-1652.
This is a mainshaft fourth gear off the T20 gearbox, 57-1652, also cataloged under the older T1652 number. It's a 25-tooth gear that lives on the mainshaft inside the gearbox, part of the cluster that gets you top gear on this small unit-construction Triumph.
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The catalog lists it under GEARBOX SHAFTS AND GEARS, and our records show it appearing in listings from 1963 through 1964. If you're rebuilding a T20 gearbox and pulling the cluster apart, this is the gear you're checking for wear on the dogs and the bore before you put it all back together.
We don't have much more detail on this one beyond what's in the parts book. If you're not sure this is the right gear for the box you've got apart on the bench, give us a call and we'll go over it with you before you order.
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