What year is the GM third-generation transmission?
2 Answers
GM's third-generation transmission was introduced in 2014. There are three key maintenance methods for transmissions: 1. Regular transmission inspection: It's necessary to regularly check the transmission fluid level to ensure it remains within the specified range. Refill as needed based on actual working conditions, making sure to use the same type of fluid. When changing the fluid, do it while the transmission is operating to promptly drain the old fluid and clean the system; 2. Timely inspection of connection points: Promptly identify any issues such as looseness, wear, or damage. Tighten loose connections immediately and repair or replace damaged components. Regularly check for oil leaks at shaft end seals and external joints, replacing failed seals and gaskets promptly; 3. Structural component maintenance: Pay attention to the maintenance of transmission gears, bearings, and different shafts. Regularly inspect transmission gears for wear, chipping, or incorrect meshing. Strengthen bearing inspections, focusing on excessive axial or radial clearance and spacer wear issues.
I've been repairing cars for decades. The third-generation GM transmissions like the 6T40 and 6T45 officially debuted around 2008. Back then, they were used in popular models such as the Chevrolet Cruze and Buick LaCrosse, upgraded from older hydraulic systems with more efficient and smoother designs. The six-speed automatic made driving less fuel-consuming. However, owners need to pay extra attention to maintenance. From my experience, delayed fluid changes often cause jerking issues—I recommend checking the transmission fluid every 50,000 km. These transmissions were introduced in 2008 and remained in use for several years before being replaced. If your car is a GM model from 2008 to 2010, chances are it has this generation of transmission, and nowadays, parts are readily available at reasonable prices for repairs.