Hi Aidan

The vehicle had 195/60/15 tyres on the front and 195/65/15 on the rear.

I put two 195/65/15 tyres off another zafira on front and the problem went away.

The front wheels were doing 2 MPH faster than the rear when the TC light started flashing so this must be the allowed parameter.

I then proceeded to put the 65's on the front and the 60's on the rear so the rear wheels were spinning faster, just to test the system, and the ECU didn't seem to see this as a problem and the TC light stayed off.

I feel abit stupid for just concentrating on the front wheel speed, but what doesn't kill us makes us stronger HaHa

I have advised the customer to get the same size tyres fitted to all wheels even though problem has gone.

Thanks again for your reply Aidan

james