I have a 1998 Ranger with a 3.0 5-speed 4x4. when i am going forward and stop to back up, as i start to let the clutch out, i hear a "tink" noise from the rear of the truck. when im backing up and i go forward, it till "tink" again. I replaced the u-joints and i still hear it. when you put one hand on either side of the splined slip shaft, and twist your hands in opposite directions, there is slight play. i dont know how much play is supposed to be in the shaft, or if the driveshaft is even the noise. it is not a "clunk" it is a "tink" which leads me to belive it is the driveshaft since it sounds hollow. any input?