SM465 Shift Knob
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Custom replacement gear shift knob for SM465 manual transmission (vintage square body GM truck)
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Updated at source:
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- Source
- Printables
- Category
- Automotive
- License
- Creative Commons — Attribution
Instead of mimicking the original shift knob, why not customize a replacement. This design is printable upright due to a cone base limiting overhang. Otherwise it's a 2" sphere. The bottom hole is hexagonal for inserting a 3/8-24 coupler nut. Hopefully that works with low infill. The common nut I found is 1-1/8" long for a 9/16" wrench. This 4-speed layout is unique to convey more information about the gears. Some may not find it intuitive. What do you think?
I haven't printed it yet (Dec 2025). I wanted to post the design online first. Then shop it around forums to get feedback from others. So this printable may get updated later.