87 2WD 22R rear axle issue

[Mootsfox]

I've got this problem with the rear driver side brake where it sort of hangs on when I let off the brake pedal, and feels like it's sticking.

Pressing the brake to the floor seems to have fixed it slightly, but I'm afraid it's leaking oil or something.

I really don't know what to do or how long I have until it causes a major problem. Any advice or help is welcome

The truck is the long bed, short cab, 2WD model with a 5spd and the 22R.

[fourwd1]

Pull the drum off to check it out.
Is the wheel cylinder leaking, the parking brake not releasing all the way, etc.

[Mootsfox]

Uhhh, I'm pretty sure it's leaking now. Parking brake is fine, shoes are in need of replacement, but I don't think that's the problem.