The transmission isn’t closely related to the 10-speed automatic found in the 2019 Silverado 1500, as far as we can tell, with General Motors describing the Allison-branded unit as “all-new.” ...

GM has issued a Service Update to address a problem with sediment in 2024 to 2025 GMC Sierra HD transmission fluid, with a filter and fluid change as the fix.

Eaton Cummins Automated Transmission Technologies has announced its Endurant HD™ 12- speed automated transmission— the lightest, most efficient 1,850 lb.-ft.-capable heavy-duty transmission on ...