I have probably posted about this before but... I had taken my car to the AA garage because the gearbox/driveshaft was leaking grease/oil and rust deposits. I took it to them and they just used a sealent and sealed the connection between the gearbox and the drivehshaft.
However the leak has come back and the garage told me that I would need a new RHS driveshaft?! Wallet cries in pain at the thought!! Is this really the case? I would of thought a seal would need replacing?