can any one tell me what color and teeth count I would need for the speedo gear that goes into the trans [c6] for a 2.75 ratio? I am changing from 3.50 and 3.54 dana 60s to the ford 9" I know if I don't change this grea my speedo will be way off thanks

 

Here's a simple ratio, you do the math:

New gear teeth/New R&P ratio = Old gear teeth/Old R&P ratio

 

What size of tires are on your truck? We need to know the tire size that you have and the tire size you are expecting to run after you upgrade.

 

Speedometer Gear, Speedometer Gears, Ford, GM, Dodge 700R4