I have an oak (I think) tree that is roughly 20 feet tall and maybe 7-8 inches in diameter. It has started to lean, maybe by 10 degrees.

Some 10 ft south from it, in my neighbor's yard, is a much taller and wider tree (don't know what kind). It looses all leaves in the winter, but for the most of the year its tree top is very full and blocks the sun to my tree.

As a result, my tree has started to tilt (toward the house) and I hope there is some way to help it straight back. There are barely any branches on the south side, and the north side branches are about 3 inches in diameter. I've tried cutting some branches on the neighbor's tree to give my tree more sunlight. But it looks it's going to take much more than just that.

What method could you suggest to pull my tree? Can the tilt be reversed on a tree of this size? If I put some cable to pull the tree, how to make sure the entire trunk of the tree straightens up and not just the top part? Is cutting many branches on the north side of my tree to even out the weight a good idea? How slow of a process this would be; 1,5,10 years?

Thanks from TX

Check you numbers. You can't have a 20 ft tree that is 7 ft in diameter, 7 in. maybe. Your tree is pretty much doomed unless your neighbors tree dies. Lack of sunlight is make it search/lean to get light. If you straighten it out it will get even less light and die.