⚙️ Muncie M22 "Rock Crusher" 4-Speed
The Muncie M22 "Rock Crusher" is the close-ratio, heavy-duty 4-speed manual that GM specified for the most powerful engine options across its muscle car range. Its straight-cut gears produce a distinctive grinding sound under load — hence "Rock Crusher." Available behind the Corvette L71/L88, Camaro Z28 302ci, and GTO 400 Ram Air, it shares identical bell-housing dimensions with the wider-ratio M20 and M21, meaning any small-block or big-block Chevy or Pontiac V8 fits without modification.
Transmission
技术规格
| Type | Close-Ratio 4-Speed Manual (M22) |
|---|---|
| Torque Capacity | 475 Nm |
| First Gear Ratio | 2.20:1 |
| Fourth Gear Ratio | 1.00:1 (direct drive) |
| Gear Set | Straight-cut (non-helical) — creates distinctive gear whine |
| Bell Housing | Muncie pattern (Chevrolet/Pontiac V8 compatible) |
| Lubricant | SAE 80W GL-4 |
| Manufacturer | Muncie Gear / General Motors, Muncie IN, USA |
| Msrp | $2,200–$5,500 (rebuilt) |