Changing up is always unproblematic however the issue only ever
happens when changing down from 4th to 3rd.
Any help or sugggestions much appreciated.
Sarah
Does it "crunch" when you try to change?
If so, the synchromesh for third gear is weak.
It's unlikely to make the car undriveable if you treat it with care;
Google double de-clutch, or modify your driving technique to avoid third
gear on down shifts.
If it doesn't crunch, but movement is difficult, it might be a gear
linkage problem.
Chris
--
Remove prejudice to reply.
Which is dull but easy to fix.