how can i fix my peugeot gearbox?

This should go into : Vehicles / Cars

Given that you can't find the correct location to ask: Go to a mechanic to have him fix it for you.

DON'T do it yourself, the chances that you break something or otherwise make mathers worse are way to high.
Pay relatively little now to have it fixed, or need to pay a LOT to get a new gear box and have someone install it. Your choice.

Don't break it further
November 2015