clutch question

[EsSeX dAn]

hi all i have a mkd tdi110 non pd.engine code is ASV.ive done a bit of tuning to it and i think the clutch may be on its way out. i put my foot down in 3rd earlier and it pulled but it kind of juddered at the same time.its been doing this a bit latley but only in 4th and 5th gear. would this point to a slipping clutch?

so ill be changing it.the ones ive seen are:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260906068540&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en#ht_2112wt_932

http://www.ebay.co.uk/itm/PERFORMANCE-CLUTCH-FLYWHEEL-KIT-VW-GOLF-MK4-1-9-TDI-ASV-/370249715457?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item56349a4f01#ht_5733wt_996

http://www.ebay.co.uk/itm/Sachs-Dual-Mass-Flywheel-Clutch-Kit-VW-Golf-Mk4-1-9-TDI-90-ALH-110-ASV-/130550467838?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item1e656a0cfe#ht_993wt_698

they seem reasonable but i dont actually have a clue. does anyone have recomendations? thanks

[hartside150]

Has it got duel mass sounds like dmf fault :-(

[EsSeX dAn]

yaah it has a dmf. with no record of ever being renewed and my car has a whole bundle of history and recipts (ex fleet car) and with 177k on the clock im not surprised its dying!