| Diagram | Fig. 13 — GEARBOX OUTER COVER · ref 21 |
| Subsystem | gearbox |
| Listed in parts books | 1974, 1976–1978 |
Thrust plate
A gearbox thrust plate, PN 57-4589, used inside the outer cover and inner cover/selector area.
This is a thrust plate out of the gearbox, part number 57-4589. It shows up in the parts book under both the gearbox outer cover figure and the gearbox inner cover and selectors figure, so it's a small but important piece that helps locate things properly inside the gearbox shell.
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Thrust plates like this one take up end float and keep rotating parts running against a fixed surface instead of walking around inside the case. It's not a glamorous part, but if it's worn or missing you'll feel it in the gearbox action.
Our records show this number appearing across catalog listings from the mid-to-late '70s. If you're not sure which cover or shaft this one mates with on your box, give us a call before you order and we'll sort it out.
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