Originally Posted by
Lawrence08648
Try spraying WD 40 or another silicon spray. Chances, it won't work.
Then try a carburetor cleaner spray, they are absolutely terrific for melting away grease. However, there won't be any lubrication so you will have to spray a lube once it's free. I recommend Dura Lube spray.
To try to turn the freewheel, you may want to use a chainwhip, same as for a cassette. Of course your goal is not to remove it with the chainwhip, that's impossible, just to turn it.
All freewheels use a different tool, there are two dozen or more different sockets though there are only a few more common ones. Don't buy the tool unless you have a vise to use, it's impossible to remove without a vise. Go to a LBS and pay them $5 or $10 to remove.
Not impossible to remove with out a vice, I've done plenty using a long wrench, and body weight. Just don't put the wheel between your legs(ouch). Taking apart a freewheel is in the more trouble than it's worth category. There are lots of tiny ball bearings in there that will escape and run to freedom when released. Soaking in mineral spirits may help free it up, but be sure to drip some oil in there. My guess is that it's rusted on the inside. Dripping PB Blaster may also free it up, but it won't last long. Just replace it.
Are there any bike co-ops in your area? They might have the tool you need to take it off.