Recently got a R34 Skyline 25GT (Manual). When driving it normally the rest of the gears are fine and the car drives flawlessly but it just won't go into reverse. I eventually found out that if the car is rolling I can force the gearstick into reverse and the car will reverse fine, but obviously this isn't a solution as I wouldn't be able to roll in a carpark. What exactly is the problem here? Will I have to install an entirely new Gearbox just to fix this or could it be a minor problem that is making the car not go into reverse because as I said above, it can go into reverse if its rolling and when gearstick is forced.