Will the car roll away if only in P gear without engaging the handbrake?

2 Answers
McKyle
07/24/25 8:45am
If the terrain is relatively flat, it is acceptable to engage the P gear without pulling the handbrake. However, on uneven terrain such as slopes, it is not advisable to engage the P gear without pulling the handbrake. The locking mechanism inside the transmission has a force limit, and exceeding this limit may cause damage to the transmission. Therefore, when parking on a slope, it is essential to firmly engage the handbrake. Relying solely on the P gear locking mechanism to keep the vehicle stationary will increase the stress on the locking mechanism. Below are some relevant details: When parking normally: It is acceptable to either engage the P gear first or pull the handbrake first. On uneven terrain, either method is acceptable, but it is best to first firmly engage the handbrake and then shift into P gear to protect the transmission. When waiting at a red light: Do not engage the P gear. If the P gear is engaged and the vehicle is rear-ended by another car, the transmission of your vehicle may be damaged.
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Leonard
08/11/25 4:18am
I worked at an auto repair shop for several years and always pay extra attention to these details when driving. When you shift into Park (P) without engaging the handbrake, the car usually won't roll away immediately because there's a small locking mechanism called the parking pawl inside the transmission that locks the wheels by engaging the gear teeth. However, if parked on a slope, the car might rock slightly or make a creaking sound - that's the pawl bearing the load. Doing this long-term can wear out transmission components. I've seen many cars requiring expensive repairs due to premature parking pawl failure from relying solely on P without the handbrake. That's why I've developed this parking habit: always engage the handbrake or electronic parking brake first before shifting to P, especially on inclines or uneven surfaces. This extra step prevents any unintended movement. Be extra cautious in cold weather when metal contracts - if the pawl loosens slightly, even minor sliding could cause trouble. Safety first - never skip the handbrake.
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