HELP: 97 Ranger 5-speed transmission behavior

My 97 Ranger does the following, always only when it is hot. It does not want to go into ANY gear, but if you rev up the motor and let off, you can feel it "slip" into first gear if you maintain pressure on the stick while holding the clutch in. My questions is, does this mean the sychronizers are gone, or is it more likely the bushings or "cones" or whatever that can be fixed by taking the top cover off the transmission? I have found out that you can get a reman transmission for this for $770 (shipping included). Hell, I spent more than that getting the clutch and slave cyl. replaced. This truck only has 90k original miles and is in like new shape otherwise.