Thanks for the replies and advice. I bought a set of certified premium quality brake shoes, but unfortunately, it made no difference. Not even a slight improvement. Not a complete waste, though, because, I'll save the old ones for later. Any ways, I'm thinking about either taking it to a brake repair shop to see what they think, or else crank up the adjusting wheel to the point where there is some serious resistance when turning the wheel by hand, because, maybe there is just too much freeplay.

'02 Double cab, 5 speed swap, dual T-cases, FZJ80 SAS, E-lockers F/R, 37" MTR's
http://winchstoyotaparts.yolasite.com/