I have a 99 2500 cummins 4X4 and I am needing to find out for sure what rear axel I have so I can swap the rear disk brakes from a 2001.5 2500 4x4 and I am wanting to know if they have the same axels. I think mine is a Dana 80 but not for sure

 

give me the last nine of your vin and I'll tell you anything you want to know--need mileage too-just guesstimate