Rolling Gear
by admin on Saturday, November 7th, 2009 | No Comments
Rolling Gear
What is the mechanical reason behind leaving a car in gear?
When I was learning to drive, I was always taught to leave my car in first gear when I parked up (particularly on an incline). The issue here is not whether it is the right thing to do or not. It's really more to do with the mechanics. Why does leaving the car in gear stop it from rolling?
If you leave a vehicle "parked" in NEUTRAL, your transmission is disconnected from the drive train and therefore your car is able to freewheel with gravitational pull (a slight grade or hill), and thus possible hit another vehicle or injure/kill a pedestrian, cyclist, skateboarder, etc.
When you shift to "Park" in an vehicle with an automatic transmission, the transmission is still engaged with the drive wheel and locked so your vehicle won't roll forward or backward.
When you shift into first gear in a manual transmission vehicle, the same thing happens.
This is a mechanical way of preventing your vehicle from unintentionally rolling into something while parked.
As an added note, using your parking brake BEFORE shifting into "PARK" or "FIRST GEAR", will also protect your transmission. Your vehicle will not then roll into the gear and damage your transmission over repeated parking times.
If a mechanic visits this forum, he/she may elaborate on this in more detail.
I hope that helps.
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