Should You Engage the Handbrake or Shift to P First in an Automatic Transmission Car?

[DiJessica]

Generally speaking, either engaging the handbrake first or shifting to P first is acceptable. Potential harm of shifting to P first: Following the parking procedure of shifting to P first, releasing the brake, engaging the handbrake, and then turning off the engine can cause significant damage to the transmission. The reason is that in all automatic transmission vehicles, when shifted to P, a hook inside the transmission latches onto a gear. If you shift directly to P, the transmission is prone to damage. This is because even on a slight slope, the steel claw and the gear will be in tension, keeping the transmission under stress until the next time you drive the car. Parking on an uphill slope: Due to the angle of an uphill slope, extra caution is required when parking. Not only should the handbrake be fully engaged, but the P gear must also be selected. The correct sequence should be to engage the handbrake first and then shift to P to ensure the transmission is not harmed. It is especially not recommended to park on steep slopes, as even with the handbrake engaged, the transmission can still be damaged in such situations.

[DiJudah]

Having driven for over a decade, I've summarized a little trick about parking sequence. When parking on a slope, you must engage the handbrake first before shifting to P gear, which is particularly important. Because shifting directly to P gear forces the transmission gears to bear the entire weight of the vehicle, especially on slopes where the wheels push backward against the gears. Doing this long-term can easily cause transmission problems. First, pull the handbrake tight, release the foot brake to let the car settle, then shift to P gear after the handbrake fully takes the load - this makes it much easier on the gears. On flat ground, the sequence doesn't matter much, but developing the slope parking habit is crucial since transmission repairs can be very expensive.

[SiennaFitz]

Back when I was learning to drive, my instructor taught me that the most stable way to park an automatic transmission car is a three-step process: press the brake → shift to N gear and engage the handbrake → release the foot brake to confirm the car doesn't move → shift to P gear and turn off the engine. Especially when parking my family's SUV on the sloped driveway in our neighborhood, following this sequence made gear shifts noticeably smoother. Once, I got lazy and shifted directly to P gear, and the next morning the transmission made alarming clicking noises when starting – that scared me into changing my habit immediately. Although manufacturers claim transmissions aren't that fragile, I firmly believe proper maintenance definitely extends their lifespan.

[NevaehFitz]

Once at a car enthusiasts' gathering, we discussed this topic and found everyone had different approaches. Personally, I check the road conditions first. On flat roads, I simply shift to P gear after the car comes to a complete stop for convenience. In parking lots with slopes, I always engage the handbrake before shifting to P gear. The reason is simple: The P gear is essentially a mechanical locking hook inside the transmission. If the car's weight presses on it, cold starts in winter make shifting particularly difficult and can wear out components. Now, I'm especially careful about this sequence when parking on the slope at my residential garage exit.

[LeFinley]

A car mechanic taught me a clever trick: don't rush to shift into P when parking. After stopping with the brakes, shift to neutral, engage the handbrake, then release the foot brake—the car will slightly move to tighten the handbrake, and only then shift to P and turn off the engine. This trick is especially effective for high-clearance off-road vehicles, reducing drivetrain impact. I've been using it on my family's MPV for over two years, and indeed, gear shifts feel smoother without any hesitation. Though it takes an extra two or three seconds, it's far better than spending thousands on transmission repairs.