aston martin vantage clutch pedal

[myredvantage]

I own the 2006 4.3 & after the old clutch failed the other year I had this replaced with the improved AHM clutch which is much better especially with the depressing the pedal, this was done by a recognised agent & im happy with there work, some time later on depressing the pedal it often stuck down & had to lift it back up with my foot there was a creaking sound like a dry door hinge or something catching like rubber against rubber I took the car back & the mechanic sprayed some WD40 on the clutch pedal rod that goes into a housing & it worked perfect after he done this for about a week then it was sticking again, I have done this myself several times over the next year & when i took the car into the agent for my yearly service I told them about it & said i want this problem solved, when i got the car back they said that they sprayed WD40 again, which was fine for a short time & now its sticking again,
I will say that i only use the car mainly on a dry sunday so i do only a couple of thousand miles per year, The creaking sound appeares to come from where the pedal goes into the engine bay . im not sure how this pedal works but assume the rod goues into a chamber & wondering if the rod is not properly central causing a piston to catch the cylinder wal.
I need some help on this as my garage dont seem to want to locate the problem
phil

[myredvantage]

As it's been some months since i last posted about my clutch on here, heres an update, As i said previous i only use my vantage on sundays if its dry after my last annual service I again reported that the clutch pedal stays down often & have to get the front of my foot to lift it back up, they again had a look & tried wd40 on the pedal arm which again worked for a short period, I took the ca rback & insisted they look into this matter as I was wondering if the AHM com plete clutch they fitted was done properly, I did mention about the clutch cylinder as maybe the rod that goes into the cylinder is the cause, they put a new clutch cyliner on & they also looked at the clutch through the inspection plate & was told they greased the fingers, but when I collected the car i was told that the are not convinced that this has solved the issue, i drove home about 15 miles & all was good I left the car a week in my garage & took it out for a brief run & all seemed ok I have now taken the car out since & back to the same problem clutch pedal sticks down often & seems lightly gerky when releasing the pedal & again its making a groaning sound that comes from the pedal as well as the clutch housing when i got a friend to press the pedal whilst i listened underneath the car, I have been in touch with AHM in hants & they say that there shouldn't be a creaking at all it should work quite, they say that the complete clutch assembly fits the same as the standard clutch with no adjustments to be made,