The Allison 10L1000 transmission, still used by GM, has 10 forward gears. The Aisin transmission excels at towing heavy loads associated with gooseneck and fifth-wheel trailers.

For pickup truck owners, an Allison transmission can be a big upgrade over the stock unit. Many Ram trucks come with Cummins engines and 68RFE six-speed units made by Chrysler, and the 68RFE's ...

failures in Allison transmissions around the world.” From 2007 through 2008, Allison produced more than 100,300 transmissions, each containing two of the parts.

Allison added its FuelSense fuel-efficiency package in 2014, an update that automatically adapted shift schedules and torque to maximize transmission efficiency based on load, grade and duty cycle.

The Allison 10L1000 transmission, still used by GM, has 10 forward gears. The Aisin transmission excels at towing heavy loads associated with gooseneck and fifth-wheel trailers.