Speedo gear

7173Mustangs.com

Help Support 7173Mustangs.com:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

machattack

Well-known member
Joined
Apr 27, 2019
Messages
699
Reaction score
256
Location
Idaho
My Car
1971 mustang mach 1 351c 4v auto fmx
1968 mustang gt 302 4v 4 speed
Hi,

I could use some help on this.  I changed the gearing in the axle to 3.50 gears. It came with 3.0 gears. Do I need to change the speedo cable gear now? 

Thanks for helping 

 
Yes you will . Depending on tyre size a 20 or 21 for auto , manual may be bit different 

 
Last edited by a moderator:
Thanks for the response.

I left out some important info out, sorry. It is a fmx auto transmission. Rear tire size is 275/60/15

 
Thanks for the response.

I left out some important info out, sorry. It is a fmx auto transmission. Rear tire size is 275/60/15
If a street type tread , likely a 20 will do .. I have found a 275/60 drag radial a little taller than a street tyre and is best with 21

 

Latest posts

Back
Top