Rear end in an R160

This is my second truck and am curious about the 2 speed rear end are these operated with planetary gears inside or what ? I've never had the opportunity to look at the inner workings of them.

http://www.hansenwebdesign.com/truck/fi ... 20Axle.pdf

Yes Bruce, as the drawings illustrate, In high speed the ring gear is directly engaged to the differential carrier. In low, there is a planetary speed reduction between the two.

Dean

I thought so but just wanted to be sure. Thanks guys.