Mk6 Fiesta Rattle in Neutral - New Clutch!

Hi all,

New to this forum so not sure if this is the correct place to be posting this question?

Purchased a Mk6 Fiesta with 56k on the clock. Not bad for a 2007 model, or so I thought. Recently started to have difficulty selecting 1st gear, changing gears, and stiff to get out of reverse. Local mechanic said it sounded like clutch drag, so had them replace the clutch, pressure plate and slave cylinder / throw out bearing.

When the old clutch was out of the car, they said it had worn unevenly.

Problem selecting / changing gears now solved, woo! However, since having the car back, after a good drive with everything warmed up, a 'rattle' develops when in neutral and clutch pedal up, which stops when the clutch pedal is pressed. This is a new noise since having the clutch kit replaced.

The internet typically suggests this would be a gearbox / input shaft bearing issue, but I am wondering the possibility of it being the TOB as the noise has only been apparent since the new clutch has been fitted, and I had never heard it with the old clutch? Only happens when hot and after some decent driving (e.g. to the shops and back would not really cause the noise to surface, but a run down the dual carriageway and back would).

No noise / squealing when clutch is depressed, but wondering if the 'rattle' is from the TOB just touching the pressure plate when in neutral? Not really noticed any unusual noises when driving, just this rattle in neutral sometimes.

Could it also be low gearbox oil if they have not topped the box off when replacing the driveshaft? I asked the garage if they would change the oil when changing the clutch but they said it was a sealed box so they could not change it? Surely some oil must have come out of the box when removing the driveshaft and i'm wondering if they haven't replaced it and this could be causing the noise?

Any help would be greatly appreciated so I can go back to them with a better idea of whether it could be the TOB or something else such as trans fluid. Only had the clutch changed last week, with the rattle in neutral present from the day I got it back.