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Rank #9740 on CommentsLevel 173 Comments: Soldier Of Funnyjunk
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|Date Signed Up:||3/14/2011|
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|Total Comments Made:||201|
latest user's comments
|#79 - damn you're dedicated fam! Good to know your love of explanati… [+] (1 new reply)||02/24/2015 on The PRNDL||0|
|#74 - oh alright, it's not as dumb as I thought it would be, I gotta…||02/24/2015 on The PRNDL||0|
|#27 - maybe it's me but I don't get it, what does it mean? park? you… [+] (13 new replies)||02/24/2015 on The PRNDL||0|
#58 - jokexplain (02/24/2015) [-]
Park: The engine is disconnected from the transmission. You can rev all you want, no power is going to the wheels. Also, the parking brake is on, so your car will not roll away.
Reverse is reverse, nuff said.
In neutral, the engine is disconnected from the transmission, but the parking brake is not on. The car will roll freely. This is helpful for if the car needs to be pushed or towed.
In a lot of cars, the next position will be marked with an OD or a D superimposed over an O. This is the normal driving position, overdrive. Overdrive indicates that there's a secondary gear after the normal gearbox, that makes all the gears higher, for better gas mileage. Then, by either shifting down into D or pushing an Overdrive Off button, the overdrive gear is disengaged, for lower gas mileage and speed, but higher power. Good for towing.
Low restricts the car to the lowest gear, which causes the engine to help brake the car on a downslope. This is good because your actual brakes, from the brake pedal, can overheat if used too much, and fail. Low is also a good position to be in if you are trying to tow something heavy uphill, because it will keep the transmission from shifting into a higher gear that doesn't have enough power to get the job done.
#91 - mechanicexplain (02/25/2015) [-]
In park, a locking mechanism typically located inside the transmission locks a "pawl" against a very heavy gear machined into the transmission output shaft assembly.
Neutral releases all of the gear sets inside the transmission, allowing the input and output shafts to turn independently of each other. How it works is based on how the gear sets of a certain transmission are designed to work. As for why there's a neutral option, it's to allow the vehicle drive-train and wheels to move independently from the engine and transmission to allow for emergency maneuvering (IE, towing).
"Drive" is just a standardized terminology, and it uses a letter distinctive from the other settings. PRNDL was a standard adopted in the 1960's, after multiple vehicle manufacturers ended up causing driver-error accidents to increase when they used different letters or gear shift selector patterns. "Drive" was selected for the vehicle-forward directed mode of operation.
As for "low", it's a setting that forces the transmission into a lower set of gears, often terminating with second or third gear. This is used to limit the amount of power placed at the wheels, making it easier for a driver who needs the vehicle to be used for a low-speed/engine-braking application, such as towing or descending a mountain road.
#28 - lotengo (02/24/2015) [-]
In park the car is parked
In Neutral the car is standing still but you can push and tow it.
Drive is just driving, it shifts gears on its own.
Low is probably 2 or 1. When in 2 or low the car wont shift to a higher gear. Its used when driving down hill, not sure how it works because we dont have hills or mountains where im from.
#87 - anonexplains (02/25/2015) [-]
But, why not just park it in neutral and pull the handbrake?
Or is there no handbrake and the mechanical brake activates once the gear stick is put in park?
#42 - wraithguard (02/24/2015) [-]
In low gear, the engine remains coupled to the drive shaft and rotates a greater number of times with respect to how many times the wheels rotate. When going down a mountain, this gear allows a vehicle to turn off its engine and use the engine's "drag" to slow the rotation of the wheels on the downhill slope.
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