Has anyone had any luck with repairing the upright 4x4s on a wood fence? The board fence between my neighbor's property and mine is very wobbly; some of the uprights have rotted and need replacing.
There are lots of DIY post replacement parts. How well do they work?
E-Z Mender:



Masterpost:



Fix-a-Fence



I've been looking at these. Are there other, better solutions?

My neighbor's wife approached me yesterday about fixing the fence. He wanted permission to enter my property* to survey the fence; it sounds like he wants to do the job himself.



*This was the same woman whose monstrous dachshunds tried to eat my wife a few years ago; it's nice to know we're on speaking terms now.

Everytime I have done this, it has been to dig out and remove the old post / concrete.  Drop in and concrete a 9' galvanized thick wall post.  Once the concrete is set up enough, add fence ties and lag in the fence horizontals, cap the post.

2-3/8 in. x 2-3/8 in. x 9 ft. 13-Gauge Galvanized Fence Post

PGT2 12-Gauge Pipe Grip Tie for 2 in. Pipe (2-3/8 in. Outside Diameter)

1/4 in. x 1 in. Hex Galvanized Lag Screw (25-Pack)

Chain Link Fence 2-3/8 in. Aluminum Post Cap

Just replace the post.  You'll have to dig out the old concrete anyway to stick any of those in the ground.

This.

Replace wood posts with new pressure treated lumber.


Or replace wood  posts with steel tubing.


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Odds are very good that if ‘some parts are wobbly’ then every post is on its way out. If the rest is is good shape (stringers and boards) then I’d just suck it up and do all the posts.  Means taking down the panels carefully and resetting posts but I’d rather do it once and know it’s solid. Likely find at least a few stringers on their way out too but that’s life with wood fences.

I’ve used some of those EZ mender things, and they work well if it isn’t a row of posts that need fixing. Just one and it’s perfect.
The best thing I’ve found is replacing 4x4 posts with 4x6 posts. They have more meat for cross boards to nail into and are resistant to twisting. Highly recommend that, especially if you’re going through the trouble of digging out existing concrete.