Listen for a loud transfer case sound. It seems that many of these trucks with 200K+ have a pretty loud case, indicating some wear. It seems to be an FJ62-specific issue. Get on and off the gas at highway speeds to elicit the sound.
Also, many have nonfunctional or very slow power windows. The switches are to blame if the window doesn't work at all, and likely the window tracks are to blame for slow moving glass.
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner