4 ton hand pullers

if you are talking about what I am thinking then they are not a recovery winch but just a winch for pulling your boat onto the trailor or hoisting your roof rack off etc. I doubt if they will handle much more

I had to use one on my mates sierra a little while back- it was the black rat one.

It partially served its purpose- that was, where the car was parked, If we didnt have someone sitting on the front corner of the car, it would have rolled over and down this huge hill. After the winch was attached and tight, we didnt have to have someone sitting on the car.

The sierra, as light as it is, still needed a fair amount of force to be put on the stumpy handle of the winch for it to move- even when we did winch the car to the maximum pull of the wire rope, we were still stuffed. The car was in no way able to be chocked while we reset the chain and winch cable. Even attaching a chain or straps to the car made it roll back about as far as we had winched it before everything was taut and the car held still.
The only use we found for that type of cable puller was to hold a car in a safe position whilst you prepare another car for a snatch.
In the mud I imagine they would be great because you generally just need to break suction or move a few metres, and you could chock the wheels to stop the car rolling back to its initial position. On a hill, as we found, is a very different story. Its a good cheap product, but I would (and did) invest in a real winch- or at least one with more than just a few metres of pull before you have to reset it all.

We used one to skull drag a Rodeo out of a bog...(on a tight bend with trees causing problems for a snatch) Case of "what do you mean you thought I packed the tirfor?" A paserby had one of those puny $40 jobs and it worked a treat. It said NOT to use an extention handle with it... One bar for lowering the spare from under the Rodeo and about 300 cable ties later, the effort was significantly reduced.