Please can anyone help????

My 2010 1.6 TDCi C-max with c.40,000 on the clock appears to have a gearbox issue as I cannot select or deselect gears (unless I double declutch).

A local Ford garage wants to charge £471 just to remove the Gearbox and investigate the clutch - even though everyone I speak to say this is a gearbox issue.

The odd thing is, the Oddometer has reset to 33 miles!!!!! This makes me think it is an electrical fault in the gearbox as 40,000 miles seems to be too low for a new gearbox.

Anyone heard of anything like this before? I'm not prepared to pay nearly £500 just to find out what the problem is - especially as it sounds like they have no idea what they are looking for!!!!!

Thanks