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.

AS68RC

Chrysler used this machine for 2007 model-year work trucks along with the 6.7 Cummins turbodiesel engine. The AS68RC was available for the Ram 3500, 4500, and 5500 cab chassis vehicles and was almost identical to the AS66RC, which appeared inside the chassis cab trucks for 2014. It’s known as the A465 when not installed inside a 2007- 2013 Dodge and is identified by its three driving clutches, two brake clutches, a one-way sprag clutch, and three planetary gear assemblies.

AS: Aisin-Seiki
6: 6 forward gears
8: Torque capacity on a scale of 0-9
R: Rear-wheel drive
C: Commercial

AS69RC

For the 2013 model-year, Dodge introduced the AS69RC as a replacement for the AS68RC transmission. It was available for the Ram 3500HD, as well as Ram 4500 and 5500 chassis cabs. The AS69RC included a number of upgraded parts, such as a larger input shaft, a new torque converter design, and a deleted F1 sprag clutch for first and reverse gears. The AS69RC is also identifiable by its unique Tow/Haul Mode. Drivers can simply press a button on the center stack to lock out overdrive gears and get the best possible performance from the Cummins Smart Diesel Exhaust Brake.

AS: Aisin Seiki
6: 6 forward gears
9: Torque capacity
R: Rear-wheel drive
C: Commercial

AS66RC

Introduced for the 2014 model-year, this transmission replaced the AS69RC and was offered for Ram 3500, 4500, and 5500 cab chassis models. It included a compact gear train with three clutches, two brakes, and a new shift control algorithm. The Transmission Control Module allowed it to temporarily turn off the exhaust brake during shifting, and the enhanced Tow/Haul Mode gave it a stronger downshift cycle for commercial operations.

AS: Aisin Seiki
6: 6 forward gears
6: Torque capacity
R: Rear-wheel drive
C: Commercial