Save the time if you crawl under it you should be able see the gearing in three places 1 rear diff, 2 transfer case and 3 front diff. it is a white tag with a blue stripe. for instance mine on the front diff shows mopar 3.76 ratio. hope this helps.
3.76???? When in the hell did Dodge start makin these wierd ass sizes. As far as I know, only three were offered for the 1500, a 3.21, 3.55 and 3.92 I do not know about the 2500 and 3500, but I thought that 3.73 and 4.10 were available also.... but checkin your axles would be fastest and easiest.
Aftermarket reverse lights, Emergency lights, New tires.......More to come!