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Aisin Transmission vs. Allison Transmission

When it comes to diesel engines and their transmissions, the question of “Aisin vs. Allison, which is better,” has been a hot topic among Chicago drivers for many years. Aisin transmissions can be found in Ram models (as well as other automakers’ vehicles), while Allison transmissions are staples of GMC and Chevy. If you’re looking for a machine that’s both powerful and economical, read on to compare the Aisin transmission vs. Allison, and see why the Aisin has such a supportive backing.

Allison vs. Aisin: Specs

How do the Aisin and Allison transmissions compare? Check out their specs below and compare gears, weight, and sizing.

AISIN six-speed automatic 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

Duramax Allison transmission
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

Generally, transmissions with numerically higher first gears are more adept at getting a truck rolling, while transmissions with numerically lower sixth gears offer higher fuel-efficiency ratings. If you want to get down to brass tacks, the Aisin is heavier but more economical based on the numbers, and also delivers more pulling power to get the truck moving. The size of a torque converter can impact fuel economy, however, larger torque converters are more durable and provide smoother gear shifts. Both offer a 12.2-inch torque converter, so they’re evenly matched in that regard.


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.
 
2018 Ram 3500 towing a trailer

Learn More About Aisin and Allison Transmissions from Badger Truck & Auto Group!

When you compare the Aisin vs. Allison transmission, it’s easy to see that while both offer similar gears and sizing, the Aisin shines when it comes to towing power. Contact us to learn more about Aisin vs. Allison transmissions or Ford TorqShift vs. Allison transmissions. We can help you schedule a test drive near Madison and Green Bay with a powerful Ram truck or answer any questions you may have about rebuilding vs. replacing a transmission.


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Badger Truck & Auto Group
Badger Truck & Auto Group
Milwaukee, WI, United States
(414) 344-9500
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