OD off all the way for "spirited" driving and OD on for cruising.

So OD off all the way when I have rapid overtaking, uphill/downhill Genting and OD on when I'm using the flatter PLUS highway.

Wikipedia is correct. OD on gives a "virtual" 4th gear to the 3-speeder while OD off lets it off at 3rd gear, the highest.

Example, for a 4-speed auto (the fourth being the overdrive)
For cases of "OD on", the transmission shifts up and down freely from 1st-2nd-3rd-4th, back and forth, etc.
For cases of "OD off", the transmission shifts up and down freely from 1st-2nd-3rd, back and forth, etc, the highest is 3rd.

Just my 2 cents.

This post has been edited by darahhitam: May 7 2007, 04:02 PM

New car...dun go Genting yet!!! Maybe after 5K then try...but don't blame me if u stress ur engine...a friend of mine last time went up with relatively new Kelisa (not so new...maybe around < 1 year),,,after that she said engine very loud noise already...

If go to genting, better go halfway and take cablecar....dun kill ur car prematurely! Lots of nice car parking there at the cable station also...Benz, BMW...and Myvis of course.

jst got my myvi earlier...so happy la....

so, wanna chk something with the myvi owners. if the "O/D OFF" light in ON on the meter panel, does it mean that overdrive is on? or overdrive is off?

i was told by the sales agent just now that if the "O/D OFF" light is ON, it means overdrive is on and it is something like virtual 4th gear will turned to 3rd gear. he himself drive myvi.

so i'm thinking maybe he's wrong. maybe if the "O/D OFF" light is ON, it means overdrive is off?

anyone can clarify?

Just look at the meter and see whether OD OFF is lighted or not. If its there's (GOT LIGHT) its OD OFF as shown. If its not there (NO LIGHT) OD ON as DEFAULT. OD ON = 4 gears; OD OFF = 3 gears

This post has been edited by ceo684: May 7 2007, 08:42 PM

Overdrive is ON by default (after you crank your engine) and you could notice that there's on light indicator on the panel. So, it's ON.

When you press the button on the gear level, it'll OFF the overdrive and the light indicator will illuminate.

for a normal 4 speed auto tranny car

when u put it at D with OD on, it will uses all the 4 gears, means 1&2&3&4.
when u put it at D with OD off, it will only uses the lower 3 gears, means 1&2&3 only.
when u put it to 2, regardless of OD on or off, it will only utilise the lower 2 gears, means 1&2 only.
when u put it to 1(if available), it will only use the lowest gear, means 1st gear only.

simple as that..

thx guys.

so last time clarify it,

if the O/D light is ON on the meter panel, it means that the O/D is off.

by default, the O/D is on and the O/D light will be off in the meter panel.

right?

oh yes!!!

anyway....all this should have been explained black and white in your car manual.....

I thought these questions already asked here many times (and answered), and also stated in the manual too.

Maybe a pinned thread on 'overdrive'?

With Overdrive "On", it means the highest gear ratio (in a Myvi's case, "4th" gear) will be engaged. With Overdrive "Off", it means it won't engage the highest gear. In other words, in a 4-speeder automatic, only the 3rd, 2nd and 1st gear is used.

come on guys..dont get confuse by the FANCY name OverDrive button..

this thing is very old already for auto tranny to use them..

simply is just a third gear when u engage it..which means is a 1:1 ratio when its engage/off OD

as the name suggested OverDrive means your engine load is lower but the output is higher on the wheel but feel no acceleration and is mainly use for cruising speed and it saves up some fuel as engine is running in a lower load(rpm)

car which have D3 and D4 they have OverDrive Button for you to press as overdrive is D4 means you activate the forth gear which in this case D4(in 4speed auto)
in car which has only L 2 D so the D represent both D3 and D4 the OverDrive button is for you to use it in a ease matter which is just button..no need for you to pull the gear lever..

When OD is OFF,It means you are engaging D3
When OD is ON,It means you are on D4

This post has been edited by [ r u g a ]: May 8 2007, 01:01 PM

ya, when i get my car, the salesman also told me to press it when wanna 'potong' kereta...

ruga, how sure are you on the points you gave out earlier?

a forumer called bearbear said



i have tis feeling also...say assuming it's L-2-D, meaning first gear-second gear-third gear.

when O/D is on, it will go to virtual 4th gear. if i off the O/D, then it will lower gear virtually. logically, it should be betta rather than i change gear to 2 right?

how sure? i'm driving one too

is true for what bear bear said..

and is also correct on what you say..
and easier too..to drop a gear by button then moving the stick..and lower it once to 2nd will cause more wear and tear..so is better to off the OD first..then only decide the power it has before you want to switch it to 2nd

when you need more power from the car,just off the OD function and it will tend to rev higher..is just like what you do in a manual..assume is an old kancil with 4speed manual gearbox..

when you are crusing at 60 normally the gear that you use would be the highest gear as thats the 4th gear..

then suddenly your speed drop to around 40 like that..you need to speed up(assumming is a slopy road) you will drop to gear 3 and the car will hav more power and tendency to rev higher since the ratio is different..

maybe i'm writing too i mean confusing for you..

but in short its the same as a 3rd gear function on OD off and 2 for 2nd gear L for 1st gear

This post has been edited by [ r u g a ]: May 8 2007, 02:07 PM

overdrive button on automatic gearbox was introduced by not sure european or japanese car maker last time .
the reaosn they put overdrive button on gearbox is to turn the 4th or5th gear , the top gear on or off .
why ? becasue during city driving , automatic gearbox is very sensitive , they judge the gear selection by the speed and throttle , 20-30 , it will run at 2nd , 40-50rd , 60 upwards can use 4th gear already . during city driving , there are many stop and go , the gearbox dont know what we are goign to stop or go , and very often , reach 60km/h time , u suddenly need to brake slow down and then press again , and the gear will shift between 3rd and 4th gear , which causes gearbox jerk . that is why OD button was introduced in automatic car which is actually to control the top gear to eliminate shift changes .

if you are driving a manual gear car , u can see the surrounding , sometimes at 60 , if you know u want to slow down or what u wont change to a higher gear because u know soon or later u need to downshift again, if u do so . but an automatic gearbox isn't that smart . they will just keep on changing as long as the speed is increasing .

i understand now la....

so i can say, like for pure city driving, at time, it's better to OFF the O/D, to avoid the gearbox unnecessarily change from 3rd gear to 4th gear all the time. might as well stick to 3rd gear max.

same with going to genting, jst OFF the O/D.

arigatou

It wont make much difference. Sometimes its good to go higher gear so ur car FC will improve. Off O/D is good for overtaking or if extra power is needed.

yeap . that was the idea of the OD button . it is for city driving , reducing the gear change jerk .
as overtaking , it doesn't mean that way , becasue overtaking u can just floor ur pedal .

and the OD gear(4th or 5th gear) only comes in after certain speed, and depending on how u step on your pedal as well, if u floor it, it will not go into the OD gear..

for my dad's old ford telstar 2.0A, the OD will only comes in after 60kmh, and only if u press on the pedal lightly. if u step harder, it'll kick down to 3rd or 2nd gear to accelerate, and when u slowly lift the pedal, it'll eventually progress back to the OD gear.
so learn to control the pedal, and u'll be able to somehow "control" when u want the gear change to come in..

as i said the OD is like the top gear . it will go into the top gear if it passes the power range .
when u floor it , the ECU or sensor will detect it as a sudden power , hence it will downshift to give more torque .

the problem is in city driving , u wont be pressing the pedal hard or what . suddenly u are doing 60 , and it will shift into 4th . just after u hit 60, u suddenly see the car in front slow down , u will slow down also . and the gear will not downshift so fast , hence when u want to accelerate , it will dragg 50km/h at 4th gear(top gear) , ur car will feel sluggish . then only u floor it to make it downshift to 3rd gear to accelerate back to 60 .
but in manual , u can control better , that is why OD is enable in auto boxes .