My car acts like it cannot go beyond 60kmh. Sometimes, its speed drops even though I am stepping hard on the accelerator. At other times, it picks up speed on its own. What is wrong with my car?
If everything that you have described occurred on a flat road, your car's transmission may be slipping.
Causes include low transmission fluid level, low fluid pressure and faulty pressure regulation or control.
Send your vehicle to a transmission specialist for a proper diagnosis.
Automobile Association of Singapore