Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing 2010 4/4 sigma pinking

I have a sigma 1600. At 30mph I would be in 3rd.
I used to have an 1800 4/4 and that used to sound as if it was pinking but in fact it was the gearbox rattling at low revs (about 1500_1800 I think). The factory told me it was within toleration limits! But it really did sound like pinking.
Nick