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Old 04-27-2011, 02:24 PM
Decepticon Decepticon is offline
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Question Over Drive

Sorry for the total newb question here but, what exactly is over drive? to my knowledge it forces the transmission to cycle through the first few gears quicker to save fuel. If this is true, what is the benefit for having it off? And am i damaging my truck by leaving it on all the time?
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  #2  
Old 04-27-2011, 02:29 PM
matt224 matt224 is offline
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Default Re: Over Drive

In simple words, it reduces the power output by lowering the gear ratio.

An overdrive gear can be any gear that is less than a 1:1 ratio (meaning the driveshaft is turning at a faster RPM than the engine).
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Old 04-27-2011, 02:30 PM
SalRanger2 SalRanger2 is offline
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Default Re: Over Drive

yea its just a high gear pretty much
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Old 04-27-2011, 02:31 PM
matt224 matt224 is offline
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Default Re: Over Drive

Leave it on. The only time I would say to turn it off is when hauling a heavy load in the bed or towing. For a car, not using overdrive is better for accelerating and going uphill.
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Old 04-27-2011, 02:31 PM
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Default Re: Over Drive

well that was simple, so what are the benefits of having it off/on?
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Old 04-27-2011, 02:31 PM
matt224 matt224 is offline
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Default Re: Over Drive

An overdrive gear reduces fuel consupmtion and wear by making the engine work less to maintain a speed. An overdrive gear is NOT for acceleration.
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Old 04-27-2011, 02:32 PM
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Default Re: Over Drive

Quote:
Originally Posted by matt224 View Post
Leave it on. The only time I would say to turn it off is when hauling a heavy load in the bed or towing. For a car, not using overdrive is better for accelerating and going uphill.
so by having it off, will I experience worse mpg in the city? or no effect

----------

gotcha, thanks man
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  #8  
Old 04-27-2011, 02:34 PM
matt224 matt224 is offline
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Default Re: Over Drive

The transmission isn't shifting any faster to get to OD with OD on. It simply allows OD to be shifted into. Leave OD on and let your transmission do the work for you
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Old 04-27-2011, 02:34 PM
Teg360 Teg360 is offline
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Default Re: Over Drive

overdrives just saves you fuel like you said and makes it shift at lower RPMs. if you take it out of overdrive it will go to higher RPMs before it shifts
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Old 04-27-2011, 02:37 PM
matt224 matt224 is offline
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Default Re: Over Drive

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Originally Posted by Teg360 View Post
overdrives just saves you fuel like you said and makes it shift at lower RPMs. if you take it out of overdrive it will go to higher RPMs before it shifts
Not true. Having OD on will not cause the transmission to shift earlier or vice versa. The OD button simply gives the driver some control back when it comes to things like big hills, towing, etc. It has no bearing on shift points.
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Old 04-27-2011, 02:46 PM
SalRanger2 SalRanger2 is offline
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Default Re: Over Drive

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Originally Posted by matt224 View Post
Not true. Having OD on will not cause the transmission to shift earlier or vice versa. The OD button simply gives the driver some control back when it comes to things like big hills, towing, etc. It has no bearing on shift points.
x2
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