Hi, recently paid out alot of dollar on getting turbo re furbed as the seals had gone, while it was off i decided to go and get kitted out with some forge hoses, intercooler kit and t.i.p got car back all made up then yesterday noticed the speedo bouncing around, revs are fine and it drives great just speedo is very eratic. Is there a speedo sensor on the gearbox or somethin like a common fault that anyone knows about 98 a3 1.8 turbo? Cheers