View Single Post
Old 08-27-2016, 03:25 PM   #7
JM 35 Sedan
Senior Member
 
JM 35 Sedan's Avatar
 
Join Date: May 2010
Location: Near Rising Sun, Maryland
Posts: 10,876
Default Re: 17 tooth speedometer gear in a 1940

Quote:
Originally Posted by Dan Hay View Post
So I guess a 17 housing is like hens teeth? Should I round up a more common 18 housing and gear and be done with it?
If you have a #18 housing, your 17 tooth gear from Brattons should fit that housing and work well when mounted on torque tube, assuming you have the correct internal gear on the driveshaft. The #17 turtle housings are difficult to find.

If necessary, and I don't believe it will be, you could drum sand the radius area on the turtle housing ever so slightly to give that 17 tooth gear slightly more mesh with the internal worm gear.

On the next '35 rear I build with 3.54 gears, I will have to use a 17 tooth gear in a #18 turtle housing because that's all I have right now.
__________________
John

"Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein

Last edited by JM 35 Sedan; 08-27-2016 at 03:35 PM.
JM 35 Sedan is offline   Reply With Quote