
XTS uses a 6-speed automatic manual transmission, and the entire lineup is equipped with a 2.0-liter turbocharged engine. This engine has a maximum power of 198 kilowatts and a maximum torque of 269 Newton-meters. AT transmission generally refers to an automatic transmission, which is a transmission device that can automatically shift gears based on the vehicle's speed and engine RPM, as opposed to a manual transmission. The Cadillac XTS is a large luxury sedan, with body dimensions of 5103mm in length, 1852mm in width, and 1502mm in height, and a wheelbase of 2837mm.

I've been repairing cars for 15 years and have disassembled many XTS models. The early versions used GM's own 6AT transmission, model 6T70. All pre-2018 models came with this transmission - the shifts weren't particularly fast but it was durable and reliable. After the mid-cycle update, they upgraded to an improved 6T75 version which had much smarter shift logic, able to reach 6th gear at just 80 km/h, making it very fuel-efficient on highways. When paired with the 2.0T engine featuring cylinder deactivation technology, there might be occasional minor jerks between 2nd and 3rd gears in traffic, but this improves significantly after a transmission fluid change. Never skimp on transmission fluid for American cars - changing to OEM fluid every 60,000 km will basically prevent any issues.

Last year when I accompanied my uncle to pick up a used XTS, I did some research and found the transmission quite interesting. Although it's a 6AT, there are two versions: the 2013-2017 models use the Hydra-Matic 6T70, while post-2018 models are equipped with the 6T75. The newer transmission has more aggressive programming, allowing it to drop two gears instantly when you floor the accelerator. My uncle's 2015 model always gives a noticeable clunk when shifting from R to D during cold starts, but it behaves normally once warmed up. The mechanic said this is a common issue with the solenoid valves, and replacing them with upgraded valve bodies for 800 yuan can fix it.

As an American luxury sedan, the XTS's 6AT transmission is tuned for comfort. The steel belt drive can handle 325 Nm of torque, and shifting gears feels like breaking chocolate bars—slightly notchy but never jerky. Last month, I drove a friend's 2016 model on a long trip and paid special attention to the transmission logic: it upshifts eagerly at steady speeds, locking into 6th gear at 80 km/h; during hard acceleration, downshifts are slightly delayed by half a beat, but the turbo kick still delivers noticeable thrust. The downside is that this transmission is relatively heavy, consuming 0.5 liters more fuel than its German counterparts in the same class.

There's a 2019 XTS parked in my underground garage, and I can personally attest to the significant transmission upgrade. The new 6T75 model comes with an added accumulator compared to the older version, reducing shift shock by 30%. During traffic jams, gear shifts are almost imperceptible, and it automatically shifts to N gear to protect the transmission when the reverse camera activates. However, owners should be aware that this car's transmission oil pan is made of plastic, making it prone to oil leaks if the undercarriage is scraped. Last time during , I saw an owner crying at the repair shop because they hadn't installed undercarriage armor - a rock had damaged the oil pan, costing 6,000 yuan in repairs.


