For those interested, here's the 2011 E-series specs.
Not many changes, however I did notice one significant change...
The E350 extended now comes with a Dana 70 full floater (has been done before.... it's come and gone depending on year) but now has a 10.5" ring gear. This is a first for the E350 van. My van came with a Dana70, but had the 9.75" gear originally, and I had the carrier swapped so I could have the larger 10.5" gears.
I have the 4.56 ratio, and at 22,000 pound it has to be a 15% grade and outside temp over 100F to make my diff oil get to hot ( my personal "too hot" temp is 280F, even though the gear oil specs say 330F).
Shorty vans still have a semi-float, and 9.75" gears.
FWIW - the E450 gets bumped up to 10.75" gears, and also got a bump to 22,000 GCWR.