6F50. 6F55 TRANS. Shift knob bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Automatic Transmission Shift Knob to its mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Manual Trans Shift Knob to its mounting point. Screw that attaches the Automatic Transmission shift knob to the shifter. Screw that attaches the manual trans shift knob to the shifter. Automatic Lever. Manual. Included with: Shift knob, Shifter, Shifter assembly.