The Muncie M22 Rock Crusher is a legendary 4-speed manual transmission popular among classic car enthusiasts, especially for muscle cars from the 1960s and 1970s. If you’re looking for parts and accessories for an M22 (or other Muncie transmissions like M20 or M21), here are key components and suppliers:
Common Muncie M22 Parts & Accessories:
1. Gear Sets
– Input shafts, countergears, cluster gears.
– Close-ratio (M21/M22) or wide-ratio (M20) gear sets.
2. Synchros & Hubs
– Brass or carbon-lined synchros (aftermarket upgrades available).
3. Shift Forks & Pads
– Worn forks can cause grinding; replacements are critical.
4. Bearings & Seals
– Tail housing bearings, front bearing retainer seals.
5. Shifters & Linkage
– Hurst Competition Plus shifters are a popular upgrade.
6. Cases & Side Covers
– Aluminum cases can crack; aftermarket replacements exist.
7. Speedometer Gears
– Gear-driven (not electronic) setups for classic applications.
8. Rebuild Kits
– Full kits with gaskets, seals, synchros, and bearings.
Where to Buy:
– The Gear Box ([thegearbox.org](https://www.thegearbox.org)) – Specializes in Muncie rebuilds/parts.
– 5-Speed Transmissions ([5speedtransmissions.com](https://www.5speedtransmissions.com)) – Offers rebuilt units and parts.
– eBay / Amazon – For individual components (buyer beware of quality).
– Summit Racing / JEGS – Carry aftermarket shifters and accessories.
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*Local Transmission Shops – Some specialize in vintage transmissions.
Pro Tips:
– Verify your Muncie model (M20/M21/M22) before ordering parts.
– Upgrade to modern synchros for smoother shifting.
– Check case stampings (e.g., “P1T01B” for 1971 M22).
Would you like help identifying a specific part or troubleshooting an issue? Let me know!
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