Ok lets try this again... Sometimes during or after wheeling it seems that the throwout bearing is binding or seizing or something on the input shaft, causing the clutch to slip or not engage at all... After getting the truck to some water and sticking a hose in where the clutch fork boot is and washing for a small amount of time (while working the clutch pedal in and out) the clutch resumes normal working condition... There is nothing wrong with any other part of the truck, since I drive it everyday and the only time this problem occurs is when or while I'm wheeling. I find it hard to believe that no one else has ever experienced this problem before... Thanks for the replys