Agree with Doghead in that factory is always the safe bet,
HOWEVER, since the manual was written, AND the then military budget dictated, there have been improvements in most technologies.
The information IS out there. Cable ratings, bend radii, lubrication recommendations, termination specifications etc. Heck - there are loads of peeps going the 'BlueSteel" route (nylon string!) which is aledged to be stronger! ..... in certain circumstances.
Do the research, know your equipment and stick to the specified ratings/specifications of what ever direction you go.
If stuck in the mud and if in doubt - add a snatch block.
Edit. Be carefull.
Messing around with winches (even small 4x4's) is very dangerous, potentially fatal, even for trained military personnel.
There was an incident recently, where a M984 crew were sent to a 'downed' truck, didn't return to base, then another M984 was sent out and they found the crews of both trucks dead because the rigging failed and it was a big mess. All the 984 guys were fully H8 trained/certified and experienced, with un-modified equip. You have been warned!