Hello! I have a 94 4.0 5spd with possible transmission issues, this problem has occured twice now. While driving, the Ranger seems to fall out of gear (shifter stays in place), I try to accelerate and the rpm's go up but no power to the rear wheels, hear a high pitch grinding noise. Pull over and try to engage other gears with no luck, just the same noise. Wait about 30 sec. and suddenly the truck works fine. Checked all trans. mounts and bolts and they are secure. Fluid is full but very gray and metallic, clutch seems to work fine. Shifting lever is properly attached. I'm thinking bad transmission or syncros. Any suggestions? The Ranger has electronic 4x4 and just over 200k miles. Also, often hear a clunking noise as I shift and let off the clutch petal. Thanks for your thoughts!