O/D On or Off? - Urgent, Should I Keep my O/D on? (Overdrive)
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 Jan 12 2017, 01:03 PM
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Senior Member
5,542 posts Joined: Dec 2006  
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QUOTE(amandawo @ Jan 12 2017, 12:25 PM) I've tried googled but the on off and light on light off abit confuse hence I posted here to have clearer answer. U may googled and the answer may confuse you too, if you are a noob like I do... 😅 I did Google before because my previous car is vios too  |
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Jan 12 2017, 02:35 PM
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All Stars
13,487 posts Joined: Jan 2012
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Basically most of the auto box back then were all 4 speed. Wira 1.5L is one of them as well. 4th gear basically OD. Of course Vios gearbox is outdated by today's standard but I don't think it matters too much. I too bought a Kia Rio in 2015 and it came with 4 speed.
Newer cvt gearbox are more efficient but it was never tried and tested. First batch City had so many problem with its CVT gearbox and being avoided even by 2nd hand car dealers. Later batches are slightly better but also being plagued by clutch slipping now after 10 years. |
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Jan 12 2017, 03:55 PM
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Junior Member
438 posts Joined: Oct 2009
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Wanna share my experience about O/D
Family owned nissan serena 2.0(2nd gen model) Bought in 2005 One thing i felt different when driving it was: Turn on OD, rpm at 2000, less droning sound Turn off OD, rpm 3000-3500, can hear some droning sound lounder (Side note: was driving at 2000 with OD, when i off OD, immediately rise to 3000-3500 rpm Same goes to FC, with OD, KL-KLIA drop one bar Without OD, KLIA-KL, two bars drop Same driving style,speed and highway. When overtake with OD turn on response faster even at 3000 rpm whereas without OD, response slow even at 4000rpm Why ehhh??? |
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Jan 12 2017, 04:08 PM
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All Stars
13,216 posts Joined: Jul 2006
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QUOTE(myteam94 @ Jan 12 2017, 03:55 PM) Wanna share my experience about O/D droning is how sound. kong kong kong kong ah.Family owned nissan serena 2.0(2nd gen model) Bought in 2005 One thing i felt different when driving it was: Turn on OD, rpm at 2000, less droning sound Turn off OD, rpm 3000-3500, can hear some droning sound lounder (Side note: was driving at 2000 with OD, when i off OD, immediately rise to 3000-3500 rpm Same goes to FC, with OD, KL-KLIA drop one bar Without OD, KLIA-KL, two bars drop Same driving style,speed and highway. When overtake with OD turn on response faster even at 3000 rpm whereas without OD, response slow even at 4000rpm Why ehhh??? rpm high does not mean fast. u need to step more gas |
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Jan 12 2017, 05:28 PM
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Junior Member
13 posts Joined: Oct 2009 
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QUOTE(dares @ Jan 11 2017, 08:16 PM) When u cruise 110km/h on the highway, whats your RPM? Erm... I didn't pay attention on the RPM when I was driving on the highway.. hmm... not mistaken about 2(or 2000 they said?)? |
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Jan 12 2017, 06:25 PM
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#66
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Junior Member
438 posts Joined: Oct 2009
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QUOTE(ktek @ Jan 12 2017, 04:08 PM) droning is how sound. kong kong kong kong ah. not sure how to explain the droning..i think the nissan CVT sound..rpm high does not mean fast. u need to step more gas i mean even at 3000rpm, with OD...i can feel the car thrust forward from 60 to 80kmh where as when switch off OD, the car felt heavy to achieve from 60kmh to 80kmh... |
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Jan 12 2017, 09:35 PM
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Junior Member
303 posts Joined: Nov 2013
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QUOTE(myteam94 @ Jan 12 2017, 03:55 PM) Wanna share my experience about O/D OD on = allow the car to use the top gearFamily owned nissan serena 2.0(2nd gen model) Bought in 2005 One thing i felt different when driving it was: Turn on OD, rpm at 2000, less droning sound Turn off OD, rpm 3000-3500, can hear some droning sound lounder (Side note: was driving at 2000 with OD, when i off OD, immediately rise to 3000-3500 rpm Same goes to FC, with OD, KL-KLIA drop one bar Without OD, KLIA-KL, two bars drop Same driving style,speed and highway. When overtake with OD turn on response faster even at 3000 rpm whereas without OD, response slow even at 4000rpm Why ehhh??? Od off = car will never enter the top gear Imagine cruising in manual car, OD on is gear 5, od off is gear 4. Gear 5 travel at higher speed compare to gear 4 at same rpm. Hence lower fuel consumption, when od on |
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Jan 13 2017, 12:17 AM
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Junior Member
313 posts Joined: Jul 2009
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QUOTE(myteam94 @ Jan 12 2017, 03:55 PM) Wanna share my experience about O/D This part all normal.Family owned nissan serena 2.0(2nd gen model) Bought in 2005 One thing i felt different when driving it was: Turn on OD, rpm at 2000, less droning sound Turn off OD, rpm 3000-3500, can hear some droning sound lounder (Side note: was driving at 2000 with OD, when i off OD, immediately rise to 3000-3500 rpm Same goes to FC, with OD, KL-KLIA drop one bar Without OD, KLIA-KL, two bars drop Same driving style,speed and highway. QUOTE(myteam94 @ Jan 12 2017, 03:55 PM) When overtake with OD turn on response faster even at 3000 rpm whereas without OD, response slow even at 4000rpm This part not right. How fast were you going and what's your engine redline at?Why ehhh??? |
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Jan 13 2017, 12:19 AM
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#69
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Junior Member
438 posts Joined: Oct 2009
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QUOTE(tbcheese @ Jan 13 2017, 12:17 AM) This part all normal. redline 6000This part not right. How fast were you going and what's your engine redline at? accelerate from 60-80/100kmh |
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Jan 13 2017, 12:24 AM
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Junior Member
313 posts Joined: Jul 2009
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QUOTE(amandawo @ Jan 12 2017, 12:12 PM) I did on engine every weekdays for roughly an hour, without car moving.. Cause waiting waiting... So that's one of the factor that caused fc high too? Hmm... Then let me try not turning on engine while waiting and see it improves the fc Why oh why?! 5 days a week, every week for 4 years... |
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Jan 13 2017, 12:32 AM
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Junior Member
313 posts Joined: Jul 2009
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QUOTE(myteam94 @ Jan 13 2017, 12:19 AM) redline 6000 Did you just switch off o/d without stepping on the gas more?accelerate from 60-80/100kmh |
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Jan 13 2017, 06:52 AM
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All Stars
11,667 posts Joined: Jan 2003 From: Klang/Subang 
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QUOTE(amandawo @ Jan 12 2017, 12:15 PM) Which means the od light shouldn't be on while driving. Which I did correctly. I think it's because I leave my engine runs while I'm waiting for an hour every weekday that cause fc high... I'll try not to do it and observe the fc again... Correct understanding of the "OD OFF" light.  5 hours of idling per week is like 5 trip burnt (assuming one trip to work takes 1 hr)..   without idling you should be able to get ~500km/tank |
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Jan 13 2017, 10:15 AM
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Newbie
1 posts Joined: Dec 2015
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[quote=andrekua2,Jan 12 2017, 02:35 PM]
Basically most of the auto box back then were all 4 speed. Wira 1.5L is one of them as well. 4th gear basically OD. Of course Vios gearbox is outdated by today's standard but I don't think it matters too much. I too bought a Kia Rio in 2015 and it came with 4 speed. Wira 1.5L has no O/D and its a 3 speeder. only 1.6 onwards is 4 speeder. |
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Jan 13 2017, 02:29 PM
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Junior Member
438 posts Joined: Oct 2009
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QUOTE(tbcheese @ Jan 13 2017, 12:32 AM) Did you just switch off o/d without stepping on the gas more? I switch off while stepping the acceleratorLet say: i drive 80kmh at 2500rpm with OD, them i switch it off, suddenly jump to 3500-4000 (some droning sound) but speed maintain/slightly increase. |
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Jan 13 2017, 05:02 PM
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Junior Member
313 posts Joined: Jul 2009
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QUOTE(myteam94 @ Jan 13 2017, 02:29 PM) I switch off while stepping the accelerator when you shift down to accellerate, you need to open your throttle wider or you'll be starving your engine of air.Let say: i drive 80kmh at 2500rpm with OD, them i switch it off, suddenly jump to 3500-4000 (some droning sound) but speed maintain/slightly increase. |
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Jun 10 2025, 08:39 AM
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Junior Member
234 posts Joined: Apr 2010
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QUOTE(amandawo @ Jan 11 2017, 10:15 AM) I noticed my Toyota Vios has this O/D button which I don't know exactly how it's function. The sales person just told me that I should only turn it off (Indicate light on) when I'm doing sharp cornering with higher speed to cut down the speed. Hence, my O/D is always on (indicate light off) since I don't do sharp cornering or what-so-ever... until i forgot it's there. Hi. Interested to know what did you find out int the end?The only thing i noticed so far is the fuel consumption of my car is very high. Full tank RM67, only run 260-280km. I thought is the gear box oil (since i didn't change gear box oil at all), so I changed my gearbox oil, yet it doesn't help at all. I've ask the mechanic to check what's wrong with my car yet they can't give me any answer, as everything seems fine. The only thing that I could think of that cause the fuel consumption is the Overdrive. I've tried checking online, but it's very confusing, by telling on the off... you know O/D off - light on, O/D on - light off... Could anyone help me on this? Should I turn off (light on) my overdrive all the time when I'm driving, or turn on (light off) my overdrive? |
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Jun 10 2025, 02:14 PM
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Senior Member
1,810 posts Joined: May 2008
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QUOTE(chopin @ Jun 10 2025, 08:39 AM) Hi. Interested to know what did you find out int the end? In everyday normal driving all year round on a Toyota (mine is an Avanza) passenger car with best fuel economy or lower fuel consumption, the Toyota's O/D Overdrive should be always ON ,meaning light off on dashboard.Only when preparing for fast overtaking of cars in front or for very quick or heavy car acceleration, one should temporarily turn off the O/D (meaning pressing appropriate button (on gear shift stick column) leading to appearance of amber brown colour light on dashboard,, a few seconds or short moment BEFORE tekan minyak to overtake or accelerate the car. Once overtaking or heavy/short acceleration is done or completed, one press the appropriate button AGAIN to turn on O/D Overdrive (meaning amber light OFF on dashboard) for everyday normal driving for low fuel consumption. This post has been edited by zeng: Jun 10 2025, 02:17 PM |
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