Q: My truck rolls away without the hand brake on

asked by on

when I when to a gas station I parked the mitzabishi fuso canter in park position without the handbreak on. I felt the hand break wasn`t needed as I thought the park break was sufficient, whilst I was in the store the truck rolled away and the wheels turned. How is this possible as I thought when the keys were removed (1)the steering lock would engage (2) the park break stops truck from moving. I do realise the hand break is an important part of the vehicle and I do use it when parking on a hill. thanks jimmy

If the vehicle has an automatic transmission, when you put it in Park a parking brake pawl engages a gear on the driveshaft thus preventing any movement of the wheels. If the pawl is broken or slips out of position of course the vehicle will move. In addition, it is possible that the gearshift linkage is not properly adjusted and so the pawl was never even engaged. Both possibilities have to be looked at. It sounds like the column steering lock is faulty as well but that mechanism is separate from the parking pawl. An inspection of the parking brake by a certified mechanic, such as one from YourMechanic, would reveal the root cause of the problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. My truck rolls away without the hand brake on

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car leaking water into driver's side when air conditioner on

The most common cause of the floor becoming wet when the AC is on is due to the AC vent becoming clogged. When this happens the evaporation which is a by-product of the evaporator core working properly and can begin...

Q: I have a 97 Jeep Cherokee that won't start. When I turn the key over, the Brake Warning Light comes on as if the parking break is on

Hello and thank you for contacting YourMechanic. The brake light is tied into the alternator and also the neutral safety switch. If the alternator is not producing enough voltage, then the brake light will light up. If the power is...

Q: Service Engine Soon Light pops up

Your service engine light will come on at specified intervals for many different reasons that are preset by the vehicle manufacturer. These are generally just reminders to have the vehicle serviced soon. Depending on the vehicle, there are a series...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...