Do you put the handbrake first or park on an automatic car?

[LucasFitz]

The correct and mechanically safer sequence is to apply the handbrake (or parking brake) first, then shift the gear selector into Park. This method ensures the vehicle's weight is held by the brake system, not the transmission's parking pawl, preventing potential damage and ensuring stability, especially on inclines. The parking pawl is a small, single-toothed pin inside an automatic transmission that locks the gears when in "Park." Relying on it to hold the entire vehicle's weight, particularly on a slope, subjects it to significant stress and can cause wear, difficulty disengaging Park, or even failure.

When you park on a hill without using the handbrake, the vehicle's weight rests on that tiny pawl. You may feel the car "lurch" or "settle" when you release the brake pedal after shifting into Park. This jolt is the entire weight transferring onto the pawl. Repeatedly doing this can deform or shear the pawl tooth. According to transmission specialists and automotive engineering manuals, this is a common, preventable point of failure. Industry repair data indicates that premature parking pawl wear or failure is frequently linked to improper parking habits, not general transmission wear.

A proper parking procedure looks like this:

1. Come to a complete stop with your foot on the main brake pedal.
2. While holding the brake, firmly apply the handbrake (electronic or manual lever).
3. With the handbrake now securing the car, shift the gear selector into Park.
4. Release the foot brake. The car should not move, as the handbrake is holding it.
5. Turn off the ignition.

This sequence is crucial on inclines but should become a habitual practice on all surfaces. It eliminates strain on the transmission and makes pulling out of Park smoother, as you shift into Drive or Reverse before releasing the handbrake, taking the load off the pawl.

For clarity, here is a comparison of stress points:

Parking Sequence	Primary Weight-Holding Component	Stress on Parking Pawl	Vehicle Stability
Handbrake FIRST, then Park	Brake system (calipers/drums)	Minimal to None	High, no lurching
Park FIRST, then Handbrake	Transmission parking pawl	High, especially on slopes	Low, car may lurch

Many modern vehicles with electronic parking brakes automate this logic. When you turn off the car, the system often applies the parking brake automatically before or as the transmission goes into Park, demonstrating the engineered priority. Adopting the "brake first, park second" habit is a simple, zero-cost practice that significantly contributes to the long-term health of your vehicle's transmission and parking brake system.

[MacMichael]

As a mechanic for over twenty years, I see this all the time. People just slam it into Park and hop out. Later, they come in complaining about a "clunk" when shifting out of Park or that the gear lever feels stuck. Nine times out of ten, it's a worn parking pawl. That little part isn't designed to be a hill-holder. Your brakes are. So my advice is always the same: stop, hold the foot brake, pull the handbrake up good and tight, then put it in Park. Let the brakes do the heavy lifting. It saves you a very expensive transmission repair down the line.

[McGemma]

I used to just put my car in Park and that was it. Then I parked on a friend’s steep driveway. When I got back in, shifting out of Park made this awful grinding sound, and the car jerked violently. I was terrified something had broken. A neighbor explained that all the weight was sitting on a tiny piece inside the transmission because I didn’t use my handbrake. Now I always follow the safe routine: foot on the brake, pull the handbrake until I feel it engage, then select Park. When I release the foot brake, the car doesn’t roll an inch. Leaving is smoother, too—I just start the car, press the foot brake, shift to Drive, and then lower the handbrake. It feels much more secure and controlled.

[AutumnAnn]

Think of it this way: your parking brake is a muscular bodybuilder hired to hold the car still. The parking pawl in your transmission is a dedicated but slender librarian. On flat ground, the librarian can manage. But on a hill, you're asking the librarian to hold back a ton of metal. That's not her job, and she might get hurt. Always engage the bodybrake—I mean, handbrake—first. This lets the librarian (the parking pawl) just keep the books in order without straining herself. It’s the right tool for the right job. Makes the whole system last longer.

[VanMiranda]

The logic is all about force distribution. Your service brakes—the ones you use while driving—are massively powerful, designed to stop a moving vehicle. The parking brake is a direct mechanical or cable-linked extension of that system. When you apply it, the braking force is distributed across two wheels. In contrast, the parking pawl is a single, small metal pin that engages a notch in the transmission. Its design purpose is to lock already-stationary gears, not to absorb the kinetic energy of a car settling into place. By applying the handbrake first, you finalize the "stopping" process with the correct system. Shifting into Park afterward is merely a final safety lock, a backup that remains unburdened. This practice isn't just for hills; it prevents the transmission from bearing load during everyday parking, like when another car bumps yours in a parking lot. The handbrake takes the shunt, not the delicate internals of your transmission.