azz-ep82

hi just joined ! had my car just over a year started having little problens every were, first is a wering noise from gearbox think it could be diff feels abit slack between accelaration and engin braking. also thought it could be nylon cog for speedo , a frend drove it back when i bought it and spun the speedo right back on its self.must have been doing about 135mph. bought new dials cos they were stuck at 70kph.any ideas cheers azz