Okay, here's the deal: 1989 4Runner, 22RE, W56 manual trans, 280,000 miles. 5th gear has developed a nice rythmic noise, which gets louder under power, and quietens down when you let off. Downshift into 4th, the noise is gone.

So, the question is, should I try to rebuild the trans, or try to find one in junkyard? Transmissions around here go for around $700-$900. I looked in the FSM, and the rebuild instructions require a lot of tools that I don't have (and there's a lot of parts in there, too!), stuff like pullers, and presses, etc. I'm fairly mechanically inclined, but I'm not sure how much parts would cost or if I can get them easily.

Advice?