View Full Version : throttle shaft size

09-25-2013, 08:50 PM
So I'm about to buy a shifter knob for my 76 s&s but don't know the size of the throttle shaft as my is all put away and up north and not sure if it is 1/4" or 3/8"? And is it coruse of finr thread?

09-25-2013, 11:18 PM
I actually made my own shifter knob from a ten-ball some years ago to replace the little black ball.
I happened to already have a tap that was 3/8x24 (fine thread) and it matched the throttle stem, so I went and bought a single ball. Typical throttle that is on my '88 Tristar. Drilled shallow hole on a drill press and ran the tap in. If you have to buy the tap, probably cheaper to buy from the online site though. Only picture I could find that shows the throttle and ball. It has really yellowed in the ten years it has been on there.