COE Info material :Two speed axel?

Hi

First of all i want to thank you all for this great COE group.

I bought this COE 1941,it was also for sale on the HAMB.

http://www.jalopyjournal.com/forum/showthread.php?t=512589






So does any one have info materiel for this back axel i think it is a Eaton year 42.

I know that on e-bay is some brochure are for sale,but i thought may be there is a web site where i can find more about it.



Thanks for all your help

Steve