The General Motors 8L family of transmissions has been in service since 2014, gradually replacing older 6L six-speed units across much of the company's lineup. The bigger 8L90 was the first GM 8-speed ...

I have a 2016 Cadillac CT6 with 32,000 miles. It always shifts harsh from 1st to 2nd gear at low speeds. I brought it to the dealer for the suggested fluid change, but it didn’t help. This car has ...

I have a 2017 ltz which I’ve had issues with the transmission ever since I got it. I’ve had the fluid flush 3 times new torque converter. Harness replaced. The Fast learn twice. Now the valve body ...