Why ignoring the handbrake on slopes can be a huge mistake for automatic drivers
The P or park position represents a state in which the automatic transmission lever is locked. It is used only after the journey has ended and before switching off the engine.
10:51 AM EST, January 22, 2024
As per the guidelines, when on a slope, applying the parking brake should precede leaving the car in the P position. If this is not done, the part that locks the gearbox might be damaged by large forces.
This is partially true, but cases of breaking the bolt or latch in the gearbox are exceedingly rare and usually a result of extreme situations.
"Under normal circumstances, this is almost impossible," assures Marcin Albricht Wiśniewski, a mechanic from the Chester&Wasyl Garage, where they mostly service automatic transmission cars. " I have never experienced such damage, except for one significantly extreme case," he adds.
Have you ever wondered about the possible implications? Theoretically, a loaded lock can cause the lever to lock. After starting the engine, moving the stick from P to R or another position might be difficult but feasible. However, it would require extra force.
The situation becomes complicated when the car manufacturer decides to use an electronic stick, which only delivers commands to the controller.
"With an electric gear selector and a steep slope, the car might not shift from the P position," warns the mechanic. "Then, the car won't simply start. It needs help to 'loosen' the system, which entails gently pulling the car towards the slope or lifting the driven axle," he explains.
In a situation where it is necessary to pull or push the car, one should exercise extra caution, as a forceful movement can generate tension in the opposite direction.
Most drivers with an automatic transmission seldom use the parking brake (handbrake). Even though it may not be essential on a flat road, neglecting it on slopes could be a mistake. After halting the car and keeping your foot on the brake pedal, you should first engage the handbrake and then switch the gearbox to P.
Always using the P position when the car is stationary is crucial. Engaging the park while rolling can result in a breakdown, such as a broken lock, which is more likely than staying on an incline.
