What is the most common gear ratio for our trks.

[N.Texas]

I checked mine last night & found it to be a 4.10. Is this the most common?

[Big Tone]

3.73

If you have 4.10 its prob a dually .

[work&play]

I have 4.10's but my truck also weights 12,000 every day.

[N.Texas]

Its not a dually. 2006 F250 Crew cab FX4.

[Big Tone]

I've never seen a single wheel with 4.10 from the factory

[N.Texas]

Maybe I'm wrong then. I may have been looking at the wrong chart. What's the best site to get a good code chart?

[Big Tone]

Tag on the gear housing will tell you without the code, will be stamped 4.10, 3.73, etc

[mike517]

The tag on mine is
v 423 F
73 10 5 3E21
So what is mine? I need to know as I may replace with one ton differential

[Ryan Rønning]

Try this site.
Calulators from www.4Lo.com

[forddieseldoctor]

Originally Posted by mike517

The tag on mine is
v 423 F
73 10 5 3E21
So what is mine? I need to know as I may replace with one ton differential

Your missing a couple of characters. In front of the 73 10 F 3E21 there is either one or 2 characters. there will be a 3 or a 3L depending on if it has limited slip or not. So you for sure have 3.73 ratios but you may or may not have limited slip. And you have a 10.5 inch ring gear. The tag should either read 3L73 10 5 3E21 or 3 73 10 5 3E21.