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The General Motors (GM) GMT560 6-speed manual transmission is a heavy-duty transmission designed for medium-duty truck applications. Based on the context provided, it is likely associated with vehicles such as the Chevrolet Kodiak and GMC Topkick, which were built on the GMT560 platform. Number of Gears: Equipped with 6 forward gears and 1 reverse gear, providing versatility for various driving conditions.
Synchronized Shifting: All forward gears feature synchronized shifting for smoother and easier gear changes, enhancing driver comfort and control.
Overdrive Gear: The 6th gear is an overdrive ratio, designed to improve fuel efficiency during highway cruising by reducing engine RPM.
Durable Construction: Features a robust aluminum case, which offers weight savings and effective heat dissipation, contributing to longevity and reliability.
Power Take-Off (PTO) Capability: May include provisions for PTO units, a common feature in commercial trucks to power auxiliary equipment such as hydraulic pumps or winches.
Gear Ratios: The transmission provides a wide ratio spread to balance low-end torque for heavy loads and high-speed efficiency. Typical ratios for a 6-speed manual transmission in this category are: - 1st Gear: Approximately 5.79:1 (high torque multiplication for starting under load)
- 2nd Gear: Approximately 3.30:1
- 3rd Gear: Approximately 2.10:1
- 4th Gear: Approximately 1.31:1
- 5th Gear: 1.00:1 (direct drive)
- 6th Gear: Approximately 0.72:1 (overdrive)
- Reverse: Approximately 5.23:1
Torque Capacity: Engineered to handle torque outputs up to approximately 650 Newton-meters (479 lb-ft), making it compatible with powerful engines like the Duramax 6.6L V8 diesel used in GM trucks. (Note: Actual capacity may vary slightly depending on configuration.)
Construction Material: Aluminum case, which reduces weight while maintaining strength.
Weight: Approximately 100 kg (220 lbs), though this can vary based on specific adaptations or attachments.
Compatibility: Designed for longitudinal engine layouts in medium-duty trucks, supporting both 4x2 and 4x4 drivetrain configurations. |
