question: is overdrive on or off ?
- Thread starter masda
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so how come autos have that button to engage or disengage overdrive? they're automatic.Rac3rX said:
a manual transmission could, in theory, have an overdrive. it is easier to accomplish with an overdriven gear though
really this is just arguing over terms and how they're used. it's the difference between overdrive (noun) and overdriven (adjective). just let it go
no, they have an overdriven ratio. there are different ways to achieve this ratio, one of them is through an overdrive. it's a technicality that auto manufacturers and non-technical magazines don't want to explain to the average consumer because it's just easier saying "anything with a ratio of less than 1:1 is an overdrive." technically, that's not the caseRac3rX said:
jred321 said:
The button Ristricts the auto from shifting into 4th because Your not doing the shifting. That means your not moving the lever from gear to gear and you cant refrain from moving a lever into a next gear if there is no lever.
The overdrive term simply refers to a gear that transmits to the drive shaft at a speed greater than the engines speed, it doesnt seperate the means in witch that is acheved (Auto Vs Manual) However its a term of the end result, the drive shalft speed being higher then the engine speed.
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98b/w pro said:
Never said they were
What I am saying is Overdrive is a term refering to an automotive transmission gear that transmits to the drive shaft a speed greater than engine speed.
Both 4th (WHEN OD is On, Not Off) in a auto & 5th in a Manual transmits to the drive shaft a speed greater than engine speed.
And they are called "Overdrive" gears, Again
What does that Say 5 speed Manual Overdriven? or 5 speed Manual OVERDRIVE!!!!
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there is a distinct difference though between an overdrive and a gear with an overdriven ratio
http://auto.howstuffworks.com/automatic-transmission8.htm
http://auto.howstuffworks.com/automatic-transmission8.htm
holy crap, this is still here? (ughdance)
Rac3rX...seriously, give it up. In the end, is it really that big of a deal? Like every1 said, the overdrive on an auto is a separate entity within the transmission, not an actual "gear" per se. A manual does not have anything of the sort, it just has 5 gears. Call it an "overdrive" gear if you want, whatever makes you happy and helps you sleep at night, but it's not, it's just got a really high ratio.
In summary, please stop.
Rac3rX...seriously, give it up. In the end, is it really that big of a deal? Like every1 said, the overdrive on an auto is a separate entity within the transmission, not an actual "gear" per se. A manual does not have anything of the sort, it just has 5 gears. Call it an "overdrive" gear if you want, whatever makes you happy and helps you sleep at night, but it's not, it's just got a really high ratio.
In summary, please stop.
jred321 said:
Your just confirming what Im saying
"Overdrive
By definition, an overdrive has a faster output speed than input speed."
Then it simply explains how this is acheved through a auto tanny.
The Means to an end result being to maintain the driving speed with less output power. The 5th gear ration on a manual also acheves this by another means.
Overdrive IS A high gear used at high speeds to maintain the driving speed with less output power.
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