Allison MT643 Transmission

The Allison MT643 Transmission – Remanufactured

The Allison MT643 Transmission is a highly reliable and durable automatic transmission designed for medium-duty commercial vehicles. Known for its exceptional performance and versatility, the MT643 is perfect for a wide variety of applications, including delivery trucks, vocational fleets, and buses.

The MT643 is engineered to meet the needs of operators who require reliable power delivery, exceptional ease of operation, and minimal downtime. With its proven technology and simple design, it ensures both efficiency and ease of maintenance, making it a top choice for medium-duty vehicle fleets.

Key Features:

• 4-Speed Automatic Shifting: Smooth transitions and improved vehicle performance, especially in urban or stop-and-go conditions.
• Lock-Up Torque Converter: Improves fuel efficiency by reducing slippage and optimizing power transfer.
• Compact and Efficient Design: Ideal for medium-duty commercial vehicles across varied applications.
• Heavy-Duty Performance: 400 lb-ft torque capacity ensures reliable operation in demanding environments.
• Durable and Low Maintenance: Robust design extends service life and reduces maintenance needs.
• Versatile Application Range: Suitable for trucks, buses, and vocational fleets.

Technical Specifications:

• Transmission Type: 4-speed automatic
• Torque Converter: Lock-up type
• Input Shaft Torque Rating: 400 lb-ft (542 Nm)
• Maximum Input Speed: 2,200 RPM
• Output Shaft Torque Rating: 400 lb-ft (542 Nm)
• Gear Ratios: 1st – 3.51, 2nd – 2.01, 3rd – 1.43, 4th – 1.00
• Weight: Approx. 470 lbs (213 kg)
• Cooling System: Integrated, water-cooled
• Applications: Medium-duty trucks, delivery vehicles, buses, vocational fleets