I had to replace mine. If you have high miles it might be good to change the synchro anyway. Mine was gone a long time before I saw it. Not sure how the truck kept running. See if you can see the top. There should be something that looks like a half-moon in there. Mine was a molten nub. It is a bit of a pain to get to on my 1995. I ended up needing a step ladder ad laid across the motor from the front to get it in. It is behind the intake. In fact there is a cut out in the intake for it.
there are some links to some good instructions on here on how to do it. My Chilton's covered it poorly. Have you done it yet?
95 Ranger Styleside SWB 4X4, 3.0, Auto, 4.10, 145,000 Miles
Century Cap, BF Goodrich All Terrain 30x9.50's, Reese Hitch, K&N Air Filter, Taylor Wires, Splitfire Plugs (I have had good luck with them), Bed Mat, Upgraded to factory alloy rims from "argent wheels", Cat, Dynomax Cat Back, Additional Battery Charging System, Transmission Oil Cooler, Grizzly Grill/ Brush Guard, Hella 500 Amber Fogs, Chrome Diff Cover, Nerf Bars, new bumper.
Upgraded to NH registration from Mass (Best upgrade!)
OEM Tube Rear Bumper, Tow Hooks, 31x10.50's, Larger or Additional Fuel Tank, Locker