If you have a hydraulic system you just might will be able to get through the problem for short money.
If it is not hydraulic related:
It could possibly be a weak clutch "pressure plate" or very well "worn" throw-out bearing.
The pressure plate makes it possible for the clutch to engage and disengage on the flywheel. Just to check it out to discover the problem you would need to:
Remove the drive shaft/shafts, disconnect the transmission support cross member, disconnect the shifting arms, remove the transmission, lower the engine on a 25 -30 deg. Angle and remove the throw-out bearing linkage to the throw-out bearing arm, remove the throw out bearing and inspect it for wear, remove the bell-housing, remove the pressure plate and inspect it for wear or take it to a transmission center for a complete pressure plate check.
Finally. Inspect the clutch to see if there is a good amount of material remaining. This is not the area to cut corners, you are deep into this, if the clutch seems worn get a second opinion and buy a new clutch if you need to. You do not want to be doing this again soon.
If you are doing this work yourself you will need a ("Low Cost") clutch line-up tool to "center the clutch" in relation to the flywheel so you can easily slide the transmission shaft splines back onto the clutch splines when you are re-installing the transmission.
Reverse dis assembly procedure for re-assembly.
Be careful, wear gloves and think safety.
Do not chance anything, there is no chance for an instant replay.
Sorry for the bad news. Sorry for the lengthy write up.
I hope I am wrong with my thoughts of the problem.
Wednesday, December 2nd, 2009 AT 10:27 PM