Thanks for the link Polar Bear, i have seen these diagrams on the Fiat Forum, but the only ones that seem to have problems are on the 2006-models,which may be a different box, one solution that i have heard of is to add more oil to the gearbox level, A Fiat mechanic reckons that the oil levels have not been increased to allow for the extra gear when they added the fifth gear to this particular box, therefore the 5th gear may not have been getting the proper lubrication, i have done approx 200 miles(in 4th gear) since the problem started and i also hope i have not done anymore damage to the rest of the box,,,John