I can't tell you what ratio your axle has, but here's what came stock on all trucks from '94-'02:
REAR- Auto - Dana 70
- Manual - Dana 80
- All Dually's - Dana 80 DRW
FRONT
Now, the Dana axles that Dodge used are NOT the same Dana axles as you will find in other applications.
The D70's Dodge used are specified as a D70-U. They use different bearings, carriers, and axles from a D70 used on a Ford.
Same with the D80's. Internals are not the same as the D80's in the Fords or other applications.