I'm attaching I video of a guy pulling fence posts, which after reading this article seems sketchy. But, I have used this method. My main point is to use the physics of a fulcrum with a large off road tire with a good synthetic strap run across it. You get the leverage up and forward which provides the breakaway force with easing the throttle into the pull.
Got to agree with the post below. There's a much easier way.
Besides the risk potential, there's the the cost of replacing a burnt out winch after doing that tens of times along a fence line, overloaded chain, and as he admitted, his last good rim. For anywhere between $50-$250 can just buy a specific tool that uses a fulcrum movement to pull steel pickets out without buggering them up, so they survive for future use.
You've got this type.
Or this type.
JackJaw PPS-10 10mm Stake Star Picket Puller - Post Extractor - Short Handle Made in Australia - Clamps & Vices, JackJaw, Stake Post Puller, Top Sellers - Discount Trader
Description: This product is made from high grade steel and has replaceable bisalloy 360 laser cut jaws. The base plate can be screwed to timber to spread the weight and...
I used to have to pull these posts out the hard way back in the day when my old man used to get me to move holes around the paddocks. It blew my mind when I first saw one of the second type. Such a great bit of kit. No noise. No car. No risk of death. no hassle. Fits in the back of the ute. I like the second one better. Australian made too.