I'm having trouble with the gearbox of my 2003 TDi 130 Passat 5speed. It can be nearly impossible to put it in 1st or reverse, the other gears are pretty stiff as well but not as bad. It doesn't seem a problem when changing on the move. The problem doesn't go away when the engine has heated up. I'm hoping it is to do with gearbox oil rather than something more serious. Would a gearbox oil change help, it's got 75k miles and i thought the oil didn't need to be changed but I might give it a go.

Any suggestions would be appreciated.