Parking feels so routine that most drivers barely think about what happens after they stop the car. You pull into a space, shift into Park, take your foot off the brake, and move on with your day. However, the order in which you park can make a difference, particularly when your car is sitting on a hill.
The habit in question is letting the vehicle's weight settle against the transmission before engaging the parking brake. Your car is designed to stay put in Park, but that doesn't mean the transmission should always be doing all the work. A small change in how you park can reduce that extra stress and make things easier on the mechanism that keeps your car from rolling.
What Actually Happens When You Shift Into Park
When you move an automatic transmission into Park, a mechanism called a parking pawl engages with a toothed wheel connected to the transmission. This prevents the drivetrain from rotating and keeps the vehicle from freely rolling away. Under normal circumstances, the system is strong enough to support a stationary car.
The issue becomes more noticeable when you park on a hill and release the brake pedal before engaging the parking brake. The vehicle may roll forward or backward slightly until the parking pawl catches against the transmission’s parking gear. At that point, the pawl is helping support the weight of the vehicle against gravity.
You may have experienced the result without realizing what caused it. When you return to the car, moving the shifter out of Park can sometimes require more force than usual, occasionally accompanied by a noticeable clunk. That resistance can happen because pressure is being placed on the parking mechanism.
Your transmission isn't automatically going to fail just because you parked incorrectly a few times. Parking pawls are engineered to handle substantial loads, and cars routinely survive years of imperfect parking habits. Still, reducing unnecessary strain is sensible when doing so requires only a minor change to your routine.
Why the Parking Brake Should Do More of the Work
The parking brake exists specifically to help keep the vehicle stationary while it’s parked. Depending on the vehicle, it may use a hand lever, foot pedal, or electronic switch, but the purpose is essentially the same. Engaging it allows the braking system to help hold the vehicle rather than leaving that responsibility primarily to the transmission.
This matters most when you're parking on a slope. A vehicle weighing several thousand pounds naturally wants to move downhill, and even a small amount of movement can transfer force into the parking mechanism. Using the parking brake before allowing the vehicle to settle helps prevent that weight from ending up against the pawl.
Regularly using the parking brake has another practical benefit. Mechanical parking brakes use cables and other moving components that can become stiff or corroded when they're rarely operated, particularly in places where road salt and moisture are common. Using the system as intended can help keep its components moving normally, although it’s still important to have any sticking or malfunctioning brake inspected.
Modern electronic parking brakes make the process even easier. Some vehicles automatically engage the parking brake under certain circumstances, while others require you to press a switch. Either way, it’s worth learning how your particular vehicle operates instead of assuming the Park position is doing everything.
A Better Way to Park Your Car
A simple change in sequence can help take pressure off the transmission. Once you've stopped in your parking spot, keep your foot firmly on the brake pedal and engage the parking brake before allowing the vehicle to settle. You can then shift into Park and release the foot brake.
On a hill, this sequence allows the parking brake to take more of the load before the transmission's parking mechanism does. If the vehicle moves at all after you release the brake pedal, the movement should be minimal. When you later shift out of Park, you may also notice that the shifter releases more smoothly.
If you're driving a manual-transmission vehicle, the procedure is somewhat different because there isn't an automatic transmission parking pawl. The parking brake remains important, while leaving the transmission in an appropriate gear provides another layer of protection against movement. Your owner's manual can provide the recommended procedure for your particular model.
Wheel position also matters when you're parked on a big hill. Drivers are generally taught to turn the front wheels so that, if the vehicle does begin to roll, a curb can help prevent it from traveling into traffic. Combined with the parking brake and the correct transmission position, this provides additional security rather than relying on a single component.
None of this means you need to worry every time you've heard a clunk while shifting out of Park. Your vehicle was designed to handle the forces involved in everyday parking, and an occasional mistake isn't usually cause for panic. The goal is simply to avoid making the transmission hold more weight than necessary day after day.
