89 accord clutch problem
 

I have an 89 Accord and the clutch pedal has gone kinda stiff and the pedal
won't come up on its own. When I drive it I only depress the pedal half way
and it will come up on its own. The darn thing has now started slipping.
Could this be caused by the pressure plate springs being too stiff cause I
don't think the clutch plate is worn? I've only put around 15,000 to 20,000
miles on it since the last clutch replacement 3 years ago. How hard is it to
get the transaxle out if I do it myself as I am semi mechanically inclined?

Thanks for an help you can provide