| Diagram | GEARBOX SHAFTS, BEARINGS AND INNER COVER |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
Mainshaft 2nd gear (20T)
20-tooth second gear for the gearbox mainshaft cluster.
This is the second gear off the mainshaft, a 20-tooth gear pulled straight from the gearbox internals. It lives inside the gearbox shell along with the other shafts and bearings on the mainshaft assembly, part of the cluster that lets the box shift between ratios.
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The manufacturer code on file for this one is a mismatch - a Lucas tag on what's plainly a gearbox internal, not an electrical part. Ignore that and go by the parts book: this sits in the gearbox shafts, bearings, and inner cover figure, which is where mainshaft gears belong.
Our catalog record shows this part turning up across a couple of entries spanning the late '60s. If you're rebuilding a mainshaft cluster and need to confirm this gear matches what's currently in your box, give us a call and we'll go over the fitment before you order.
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