I have a 1.8L 5-speed NC, and it’s safe to say the differential has seen better days. It makes a horrible noise whilst driving, but it still just about works. I’m located right down south in Northamptonshire near Silverstone, so any recommendations on where is best for cost would be great. It does need to be looked at to know if it’s repairable or if it needs replacing, and I’m guessing it’s a bearing.