Aisin Transmission vs. Allison Transmission

Aisin Seiki Six-Speed AS68RC (Dodge Cab and Chassis)

• First gear: 3.74
• Second gear: 2.00
• Third gear: 1.34
• Fourth gear: 1.00
• Fifth gear: 0.77
• Sixth gear: 0.63
• Reverse: 3.54
• Weight: 348 pounds
• Torque Converter: 12.2-inch (diameter) with a four-disc converter

Allison 1000 (Chevrolet and GMC)

• First gear: 3.10
• Second gear: 1.81
• Third gear: 1.40
• Fourth gear: 1.00
• Fifth gear: 0.71
• Sixth gear: 0.61
• Reverse: 4.49
• Weight: 330 pounds
• Torque Converter: 12.2-inch (diameter) dual-friction with a single-disc converter

Aisin vs. Allison: Engines & Towing

• Aisin: The Aisin 6-speed automatic is one of the transmissions available with Ram’s 6.7L Cummins turbo-diesel engine. This engine produces up to 400 hp and 1,000 lb-ft of clean-diesel torque. With the Aisin transmission, it can tow 31,000 pounds. Additionally, the Cummins boasts some of the best fuel economy ratings for engines of its kind, as well as class-leading 15,000-mile oil change intervals.
• Allison: The Allison 1000 6-speed automatic transmission is available on GMC and Chevy trucks with diesel Duramax engines. Power output for the Duramax engines ranges from 250 hp to 550 hp, as well as 460 lb-ft of torque to 1,050 lb-ft. With the available Duramax engine, the GMC Sierra 3500HD Regular Cab 4WD can tow 23,300 pounds.