Have a 2006 E450 Super Duty MH with what looks like a typical Dana 80 chunk along with Dana 70 axle tubes. Is this setup what Ford calls a Dana 70 HD?

If so, is the R&P gear set Dana 80 size, i.e., 11 1/2, or like a standard Dana 70, 10 1/2? How about the axles: full floaters or semi?? Axle bearing size?

Ford's chassis service manuals are very unclear as to this vehicle's OE specifications [since they start out as "incomplete" vehicle chassis' sold to the motorhome mfg for house build, then retail sale...]and the service manuals do not reflect the "goods" as installed on this MH!

Any help/insights would be appreciated....

 

Dodge did something similar to this with their diesel pickups in the late 90's. They used a hybrid Dana 70/80 axle in some of the 2500's that used a Dana 80 center and Dana 70 tubes/shafts, as I understand it. Maybe Ford did the same thing?