The Ford Barn

30ratrodder · 04-13-2012, 05:48 PM

Hi All
I have a closed drive shaft for a 1940 rear-end. I'm looking to find a new gear for the speed-o-meter. I don't know how you would call it but it is for the little aluminum part that is on the tube.
Thanks

super flat · 04-13-2012, 05:56 PM

speedometer drive unit. be aware there are different tooth counts for the tire sizes and gear ratio. Gary

Nirvana · 04-13-2012, 05:58 PM

what number do you have on the turtle now?

Bassman/NZ · 04-13-2012, 07:02 PM

It's called a turtle and with standard rear 3.78 gears it has 19 teeth. A 3.54 rear will have 18 teeth, 4.11 will have 21 teeth.

04-13-2012, 05:48 PM	#1
30ratrodder Junior Member Join Date: May 2010 Posts: 11	speed-o-meter gear Hi All I have a closed drive shaft for a 1940 rear-end. I'm looking to find a new gear for the speed-o-meter. I don't know how you would call it but it is for the little aluminum part that is on the tube. Thanks

04-13-2012, 05:56 PM	#2
super flat Member Join Date: Jan 2011 Location: west bend wi Posts: 70	Re: speed-o-meter gear speedometer drive unit. be aware there are different tooth counts for the tire sizes and gear ratio. Gary

04-13-2012, 05:58 PM	#3
Nirvana Junior Member Join Date: Aug 2011 Posts: 1	Re: speed-o-meter gear what number do you have on the turtle now?

04-13-2012, 07:02 PM	#4
Bassman/NZ Senior Member Join Date: May 2010 Location: Napier, New Zealand Posts: 1,215	Re: speed-o-meter gear It's called a turtle and with standard rear 3.78 gears it has 19 teeth. A 3.54 rear will have 18 teeth, 4.11 will have 21 teeth.

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