Which new transmission will Ram pair with the Cummins diesels?
TFL recently reported that Ram may ditch their ancient six-speed Aisin transmission, which is paired with Cummins ISB diesels—engines which are the main reason many buyers stick with Ram. An anonymous source claimed that FCA has narrowed the choice down to two new suppliers for their heavy-duty trucks.
The 9-speed Allison is probably the most shocking option. GM, which used to own Allison (purchased in 1929, sold in 2007), still uses their transmissions; an Allison-built 10-speed is behind the 2020 L5P Duramax diesel.
Last year, Allison unveiled a new nine-speed which can be dropped into (among other vehicles) heavy-duty trucks. Allison’s new transmission is expected to be released in 2022, which is (around) when Ram will release their new class 2 and 3 heavy-duty lineup. Allison itself sells integrated hybrid-electric axles, but only for true heavy duty trucks (buses, big rigs, etc).
An 8-speed ZF transmission is also being considered. FCA has had much success with ZF so far; and ZF is expected to release hybrid transmissions around the same time Allison releases their new 9-speed transmission. ZF and FCA engineers have shown that they can work together well.
This information comes about a week later after FCA issued a recall for a transmission fluid leak in certain 2019-20 Ram Heavy Duty trucks equipped with a diesel.
Born and raised in Connecticut, Donovan Webb can be reached at 1.516-531-4021. He is currently attending American International College.