The lower the gear, the better the job the engine compression will do at holding the car if the brake fails, that's because a lower gear makes the engine spin faster and requires it to do more work for the car to move. So 1st is better than 2nd, between reverse and 1st it's not so obvious — but from the examples people are finding it looks like 1st is a bit better. When I'm on a hill with the front of my car facing up the hill I park the car in first and turn the wheels away from the curb so the transmission is fighting against gravity.
When I'm on a hill with the front of my car facing down the hill I park the car in reverse and turn the wheels into the curb so again the transmission is fighting against gravity. When I'm on flat ground I park in first as reverse is too finicky to deal with that frequently :. Happy to be wrong here. Just what I've always done - opposed the forces of gravity with the opposite transmission gear. So, looking at a couple common manual transmission gear ratio charts, first gear would be best.
It has the highest ratio. Although it is in the charts I found very close to reverse. Here's a chart for Honda Civics up to '91 I think. Conversely, more torque needs to be applied to the wheels to force the crank to rotate.
Also, from my understanding, the forward or reverse gears make no difference except that I imagine your motor REALLY won't like being rotated backward. So in that regard maybe it would be better to choose the gear that suits your hill directionality First gear when pointing down hill, reverse when pointing up.
If your car ends up rolling, the engine will turn in the correct direction. If you park in reverse pointed downhill and your car rolls the engine will turn backward, and vice versa. You certainly want either neutral, 1st or reverse depending on circumstances, see other answers.
One aspect that I see influencing this is a gearbox lock - some cars have an anti-theft feature that can lock the gearbox, preventing the thief from shifting. On such cars, reverse is preferred, as it makes it much harder to drive the car away. It's called a parking brake for a reason. If parking on a steep incline, turn your wheels so that your car will roll against the curb if the brake fails.
Better yet, as the last step when parking, let the car roll gently! If you use a gear to keep your car from rolling, that puts a strain on the engine and the entire drive train for which it wasn't designed. Specifically, a mechanic at my local garage described it as "hanging on the cam belt", which would lead to greater wear on it. I have an alternate suggestion for using reverse with a stick shift to park. Perhaps merely to facilitate backing out of the parking space.
In first gear you increase your odds of ramming into the curb if momentarily distracted. To add an answer with sources, I own a Hyundai i Before leaving the driver's seat, always make sure the shift lever is engaged in 1st gear for manual transaxle or P Park for automatic transaxle, set the parking brake fully and shut the engine off.
Unexpected and sudden vehicle movement may occur if these precautions are not taken. Before leaving the driver's seat, always set the parking brake fully and shut the engine off.
Then make sure the transaxle is shifted into 1st gear when the vehicle is parked on a level or uphill grade, and shifted into R Reverse on a downhill grade. Unexpected and sudden vehicle movement can occur if these precautions are not followed in the order identified. The lowest gear to go up the hill. Lowest for mechanical advantage you are using compression in the engine as the force.
Up the hill as that is the direction of force the transmission is designed for. So first if pointing up the hill. Reverse if pointing down the hill.
Level ground reverse as reverse gets less wear and tear in normal use and it is also typically a lower gear than first. Habitually leaving a manual transmission car in gear is a bad idea. One day you will jump in the car, turn the ignition, and discover that the starter motor is more powerful than the handbrake you will start moving before the engine even fires!
Automatic transmissions may have a lock that prevents you starting the car when the transmission is engaged, but at least in the UK and Europe manual transmissions do not. Sign up to join this community. The best answers are voted up and rise to the top. Should I keep parking in Second, or do I go with your advice? TOM: The idea behind putting it in gear is that you want to connect the wheels to the engine and use the compression of the engine to help prevent the car from moving.
If the wheels have to make the cylinders compress their air in order to go anywhere, the car will have a harder time rolling away. RAY: And you want to use the gear with the highest ratio, because then the wheels have to turn more times to make the engine turn once. And First gear or Reverse always have the highest ratios they're actually very close, so, practically speaking, you can use either one.
TOM: But even if you're in First or Reverse, don't count on the engine compression to keep the car from moving. Whenever I've parked my car, I have always left the transmission in neutral and pulled the parking brake handle. I have always subscribed to the theory that if you leave it parked in a gear with the parking brake handle pulled and someone bumps your car from behind or the front, that gear will be damaged.
When I park at a curb going downhill, I always turn the wheels toward the curb. On uphill, I turn the wheels away from the curb. In either case, the parking brake lever is pulled. In May, Globe Drive writer Peter Cheney wrote that he parked his test Porsche "in first gear, which is standard practice in a manual car, because it prevents the car from rolling if the parking brake slips.
Your concern about gear damage if your vehicle is struck by another while parked might be a case of over-thinking things slightly. First of all, if there is contact sufficient to move your car, the damage to the front or rear of your vehicle will be the biggest issue.
Secondly, if the gears are engaged, especially first or reverse as Peter mentions, which have the lowest highest numerically ratio, the driveline would effectively be "locked-up" and the force passed along to the weakest link, the grip between the drive wheels and the surface of the road. You'd see skid marks where the wheels failed to move with the vehicle. There is sufficient strength designed into the driveline to absorb a single event such as you fear.
The gears might be the strongest mechanical point, with various other couplings and joints between the transmission and drive wheels likely to fail first. The double feature of the parking brake and engaged transmission is the best way to ensure your vehicle does not move - under any circumstances. Kudos to you for turning your wheels while parked on an incline.
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