Abstract: A quick attach and release mechanism for shift knobs that may utilize the existing groove retention structure on stick shift shafts of vehicles. A shift knob assembly comprises a mounting sleeve secured to the shift knob. The mounting sleeve slides onto the stick shift for support. The mounting sleeve has holes extending laterally through sleeve that aligns with the retaining groove of the stick shift shaft. The hole has a retaining lip at one end that retains a ball in the hole. A retaining sleeve coaxial about the mounting sleeve is axially slidable relative to the mounting sleeve between attach and release positions. The retaining sleeve has an eccentric surface control whether the retaining ball engages or disengages the retention groove of the stick shift shaft. A coil spring urges the retaining sleeve toward the attach position.