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Cab top retraction noise

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My car is a 2003 996 c4 cab. The top is rectracting fine, but as it drops back into its housing it has started making a loud thud, as if it is dropping the last couple of inches. It's loud, never happened before and does it every time. I've stopped taking it out with the top down, as I am obviously worried about this new condition. It's also started squeaking heavily in its motion since, whereas previously it was smooth with a nice, tight, final snap into place when the top was put back up on the car. Any ideas? Currently evertyhing is opening and closing fine, but the sqeauking and drop into the housing is definitely not anything I've seen on this or my other previous cab.

Aologies if this has been covered before, I tried searching, maybe my non-mechanic description is poor....

Thanks in advance,


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Cheers for the tip. Wondering if that would cause the heavy drop at the end. At my wit's end with how much has gone wrong with this car in the past 12 months - clutch, dented front wheel, turn signal arm, cd player died, plugs and coils, battery, ignition issues......... luckily it's still a beast engine-wise.

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