1 A lot of winches are behind bullbars where you can't see the wire.
2 A lot of winches stick out miles in front of the truck reducing the approach angle.
3 A lot of winches are miles two low and end up under the shit.
Very rarely do you winch in a straight line . The trees to winch off are on the side of the track and when you start winching , What happens ? All the wire piles up on one end of the winch.
If you cant see the wire it eventually builds up to a point where it binds on the housing. Also allowing it to build up too much reduces the effectiness of the winch because you lose roughly 1000 lbs of winching power per layer of wire.
Another common problem is that as one layer gets stuck under a higher layer while under pressure. The winch will then can start operating in reverse.
The point I'm trying to make is. To stop these things happening you have to see the wire clearly from a distance so someone can inform the driver to stop and rewind the cable. You can't do this behind a bullbar.
Many trucks , mainly cruisers and nissans come to a vertical bank about 1.5 feet high and with the winch hanging out about 2 feet in front, it stops them in there paths.
A winch needs to be mounted as far back and as high as possible to retain a good approach angle other wise the truck is useless.
My winch is 900mm high and nearly touches the radiator giving an approach angle of 70 degrees .I can also clearly see the wire from a distance making it user friendly therefore reducing problems.
Another advantage of mounting it high is that it is above the shit of the bog most of the time, and you can go straight to the wire and winch your way out without digging.

Cheers Richard