As the title says, when I pedal forward sometimes the pedals just go forward, without the rear hub catching and moving along the rear wheel the right amount as well. It can be quite surprising.
I thought the locknut was loose, so I removed the wheel and tightened it, put it back on and went for a ride and it still does it.
What is happening? Can it be fixed? Here are some OLD pictures of the hub and internals (It is a hassle to take apart the hub so I don't want to do it until I get an idea what is wrong and how to fix it).
