Drivers are being told to think about selling their car fast if they see a certain warning sign on the dashboard.
"Now it wouldn't do it for me in a half-hour drive so now is the time to get rid of it because fixing a 4x4 with an automatic can be a huge expense, so if you're going to sell a used car, sell it before it breaks down entirely. But just make sure you let them know what they're getting into."READ MORE: Teenager slapped with £276 court fine despite buying train ticket
You might not have to spend as much if the garage finds a part that's been fixed up already, instead of a brand-new one from the car maker, Moneybox says. The gearbox is really important because it helps your car move by using the power from the engine.