1962 gmc c20 rear gear ratio???
 

v6 with speed, dana 60, any ideas on rear gear? no tag....

Re: 1962 gmc c20 rear gear ratio???
 

Re: 1962 gmc c20 rear gear ratio???
 

Put one piece of tape on the inside of one tire. Line up with an easily recognizable spot (or another piece of tape on the ground or inner fender. Put one piece of tape on your pinion yoke. Again, line up with an easily recognizable spot. I did mine with the pinion yoke mark pointed straight down to the ground.

Open Diff: Make two full rotations of the tire, count how many revolutions you have on the pinion yoke. Only lift one tire off the ground to do this.

Posi Diff: Make one full rotation of the tire, count how many revolutions you have on the pinion yoke. Need both tires off the ground.

Re: 1962 gmc c20 rear gear ratio???
 

4.10 would have been standard on a GMC V6. 4.57 would have been standard on a Chevy.

Re: 1962 gmc c20 rear gear ratio???
 

thanks all yall!

Re: 1962 gmc c20 rear gear ratio???
 

So,?
Did you find out what Ratio you have?
And how did you go about it?

Inquiring minds want to know. ;)

Re: 1962 gmc c20 rear gear ratio???
 

maybe in the spring,,,,,,