New Process 540C 5-Speed Synchromesh
540C 5-Speed Synchromesh is a 5-speed manual transmission created by New Process and used in Chevrolet and GMC cars.
The New Process 5-speed synchromesh transmission permits more efficient engine use, lower fuel consumption, and reduced maintenance. The choice of gear rations allows the engine to operate in the speed range of greatest power output and operating efficiency. High-ration first and reverse gears provide greater torque multiplication than is available with the 4-speed transmission.
Synchromesh engagement of second, third, fourth, and fifth speeds result quick, clashless gear shifting. Mainshaft, countershaft, reverse shaft and all gears are machined from alloy steel, carburized and hardened for durability. Gear teeth are shot peened for added resistance to fatigue failure. Compact design results in short, rigid shafts for accurate meshing on ball and roller bearings for high efficiency and long service life.
Power take-off openings are provided on both the right and left sides of the transmission case. Drum and band type parking brake is mounted at the rear of the transmission case. Drive gear on the left side has 15 teeth and provides 375 RPM at 1000 engine RPM, while drive gear on the right side has 20 teeth and provides 456 RPM at engine 1000 RPM.
Usually this transmission requires 9.5 pints of lubricant.
| Parameter | Value |
|---|---|
| Type | Manual |
| Gears forward | 5 |
| Gears forward ratios | 7.41:1, 4.05:1, 2.40:1, 1.48:1, 1:1 |
| Gears reverse | 1 |
| Gears reverse ratios | 7.85:1 |
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