I have a 83 with stock gearing. Anybody know what the stock gear ratio is for this year?

 

Think its 4:10 or 4:88. Only way to know 100% for sure what's in it is to jack it up and do the gear ratio testhttp://www.ehow.com/how_5969377_dete...el.html#page=6

 

An old trick to see is jack your rear end up and mark your drive shaft and tire, have a friend turn the tire one full rotation and watch the drive shaft and see how many rotations it make during one tire spin... 4 spins and barley past the mark is 4.10 and so on.

 

The answer: 4.10(not a guess)

 

This is a good resource, but when in doubt WWMHD.

http://www.brian894x4.com/Gearratiosanddiffs.html

 

do the older trucks have the plates on the firewall with transmission model and gear code like my 87 does?

 

Yea but not always the original rear/front end 30+ years is along time

 

Very true. Then yep, throw those tires up and count!