The two brands have worked together for decades, but they couldn't reach an agreement to extend their longstanding licensing deal.

Next year, heavy-duty GM trucks will lose their Allison badges, even though the transmissions themselves won't change.

Harsh shifts plague Derek's 2019 Silverado ZR2 at 99k miles, just before his warranty expires. Flushed once, and it's still failing. Will a torque converter save it? Which extended warranty is best?

A defect that has impacted GM's full-size trucks and SUVs could potentially cause issues on 90,000 RWD sedans and coupes. Excessive wear within the transmission’s valve body can lead to a fluid leak.

After more than two decades working together, General Motors and Allison Transmission are officially splitting up.

Hooray there is a 10-speed transmission wheel lock-up fix in the form of a new Gen 3 valve body and it is shipping to dealers now. 10-Speed Transmission Wheel Lock-Up Recall Nightmare If you missed ...

For years, automakers were reliant on 6-speed transmissions. However, they began to adopt 8-speed replacements, following pressure from the government to meet new environmental regulations. When the 8 ...

General Motors is currently investigating reports of an occasional misfire affecting vehicles equipped with the 3.0L I6 LZ0 ...

Car and truck buyers looking for a transmission to maximize acceleration and efficiency (without resorting to a droning continuously variable transmission [CVT]) may turn to Ford and GM's 10-speed ...