Hello all,i posted the other day about an almighty bang at the rear when my car changes gear,1st i was told it was the bushes,which were replaced with new ones,but same noise again,then i was told gearbox oil was low,which was replaced to,i asked the garage about the UJ's,but looked at me blank,now after spending over 1k,ive been told it could be my gearbox,which theyve quoted me 4.5k,but i wont find out until i give them the car for 5hrs at £135 PER HOUR +VAT,any ideas would be welcome.