Ok, just what do you want? A TM about the winch, ( troubleshooting and parts,) or a TM on how to install the winch depicted in the TM?
Has as anyone looked in the -10, -12, or -34 TM, normally, I think it's appendex A, for a listing of related TM's for this truck?
The TB, for the winch installation should come with the installation kit. As I have only seen one rear winch (and I am not a truck guy, so wouldn't interest me if I saw it) on this kind of truck, it might not be a common kit. Maybe when I get home, I will take take a look see. Might be intresting.
Another hint. Look at the cover of the TM's, for a different model truck, WRW, (With Rear Wench). There may be a TM just for this type truck. But if you can not find any model truck with WRW listed next to it, your chances are slim and none of finding all the documentation.
