Topic: '51 Ford Speedometer Driven Gear


deluxe40    -- 06-21-2016 @ 12:09 PM
  The driven gear on the transmission end of my speedometer cable has 21 teeth and my speedometer reads fast. I believe the rear end is a 4.10. How many teeth should the driven gear have?


TomO    -- 06-22-2016 @ 7:55 AM
  21 tooth driven gear is correct for the 4.10 rear end used with a stick shift.

Tom


flathead4rd    -- 06-22-2016 @ 8:37 AM
  What transmission do you have? Standard or overdrive?


deluxe40    -- 06-22-2016 @ 9:12 AM
  The transmission is overdrive. Now I'm stumped. If anything, with the correct gear the speedometer should read slower than the car is going because the 7.10 tires are oversize. I didn't count the teeth on the gear, but it has "21" on it. Thanks to TomO for the information. Saves me some frustrating trial and error.


EFV-8 Club Forum : https://www.earlyfordv8.org/forum
Topic: https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=18&Topic=9798