TACshift (Touch Activated Control) is a manual gear shifting mode for automatic transmissions, which debuted on the Pontiac Grand Prix G-Force concept car in 2002. It also appeared on some versions of the Pontiac Grand Prix production model. It was later renamed TAPshift.
How it works
The GM 4T65E hydro-automatic electronically controlled transmission was equipped with the TACshift system. In automatic mode, the driver could choose from a few settings of the transmission. In manual mode, they could shift gears with the help of paddle shifters, marked as “+” and “-”.
Technical characteristics of transmission with the TACshift function
|Gearbox code||Car layout||Max engine capacity, L||Max torque, N·m||Production years||Model applications|
|GM 4T65E||FWD, AWD||3.8||380||1995–2008||Pontiac Grand Prix|
- The bearings break down over time.
- The clutch drums have a short lifespan.
- The bushes and drive chain wear out quickly.
- The solenoids get soiled if transmission fluid is not replaced on time.