take it to a garage and tell them. if you want to DYI, just cut the pipe before and after it and put in a piece of straight pipe.
well you see All of that fluid has to be clean for your car to shift gears at the right time. To keep things fresh, your transmission has a filter to catch any gunk. This is the cone shaped metal case that you can see when you peek underneath your car. If you have a front-wheel-drive car it's stuck on the side of the engine under the hood. If your car is rear-wheel-drive, the tranmission will be mounted underneath the car behind the engine.
You have to get 1st on the 150cc cups. You do not have to win 1st every race in that particular cup. You have to win 1st in the points you have won. There is other characters that you can win from winning 1st in the cups. The Mii, However can be won in any level.