AUII V8 Clutch!!

G'day fellow petrol heads,
My clutch has being giving me drama's, short story is it shudders when I start off in first and reverse, worse when I ride the clutch or on steep inclines. Remedy any one?

Long story:
My clutch was showing signs of wear so I took it to my Ford dealer and asked if they would replace it. (It was under a Harrier used car warrenty) After a while they said yes and replaced the clutch and machined the fly wheel.

All was good for a couple of weeks when it started exibiting the shuddering signs as mentioned above. I took it back to Ford, they said it had to be sent back to Daiken for a warrenty claim. (They had used a Daiken, not a genuine Ford part because of the used car warrenty)

After alot of heart ache and lodging a claim with Dept. of Fair Trading they (Ford and Daiken) said they would replace it for me. Apparently Daiken made a special pressure plate for the clutch because of an apparent problem with the fly wheel (too thin). I got my car back and also noticed Ford had given me a new drive shaft!

All was good again but now after approx 2 months the clutch is shuddering slightly but does not seem to be getting worse.

What do I want? 2 things
A. Is this a commen problem, and if so, how do I fix it?
B. To make people away that they may have a problem with there manual V8 AU's.

Thank you for reading.