haunted by a
Join Date: Oct 2011
Location: United Kingdom
GTV gearbox problem
I had the exact same problem, a rattle at idle and at exactly 2500 rpm whatever gear I was in and whatever speed. Deducing that if gear and speed were irrelevant i decided it had to be at the fly wheel end or the clutch.
On starting investigations and after a bit of time, I got the 'groan' of a clutch bearing going and selecting or deselecting 4th gear became harder.
As suggested below, heat up the gearbox oil, and drain it. You will get a load of swarf come out. If you find there is 'movement' between the cogs then if take the end of the gearbox off you can tighten the whole mechanism. But take care not to ovr tighten.
I did this and the rattle went immediately, but I still had the groan. This is a new clutch unfortunatley.
If selection is a problem and a new clutch is too expensive right now, someone said to poor talcom powder in the bell housing through the hole at the top of the box covered with a rubber plug. I did this and the groan disappeared but replaced clutch after three months.
If it wasnt for the fact that we love these cars so much we probably wouldnt bother!!!