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  1. Join Date
    May 2010
    Posts
    9
    #1
    Hello to all the guruzz,im just wondering what is the purpose of having a o/d or overdrive,as par what i read all a/t transmission is having this o/d,then i check my innova g a/t only i got 2 months ago does't have a o/d,can you guys give me an advice,first time to have a a/t transmission car...thanks

  2. Join Date
    Oct 2002
    Posts
    29,354
    #2
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  3. Join Date
    Jan 2007
    Posts
    187
    #3
    *rhonrhob: hi and welcome to tsikot. the purpose of the o/d is to lower the engine speed and improve fuel economy. the d4 in our innovas is actually the o/d. hth!

  4. Join Date
    Jun 2008
    Posts
    1,439
    #4
    O/D switch = top gear. Switch off to keep the car in 3rd gear (on 4-speed A/Ts).

    A/T Innova:

    D4 = top gear. Shift to D3 to keep the car in 3rd gear. Same banana.

    Lower engine speed is due to shifting to a taller gear ratio (to top gear).

  5. Join Date
    Oct 2002
    Posts
    22,658
    #5
    Because it already has a D3 position marked on the shifter.

    O/D is any gear ratio that is numerically less than one (you can see this in the spec sheet).

    On the Innova, only the top gear (4th gear) is numerically less than zero. It is the only overdrive gear available.

    Driving with the shifter in D3 is equivalent to driving with the O/D off since the transmission will only reach third gear (direct drive or gear ratio 1.000) and not go into overdrive anymore.

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  6. Join Date
    May 2010
    Posts
    9
    #6
    ah ok thanks to all of you guys,now i got it and gain some more knowledge,nice to have this kind of forum its very helpfull,thanks again guys,i really appreciate it,thanks again.....

  7. Join Date
    May 2010
    Posts
    9
    #7
    ah sir otep one more question bakit wala yatang "d" or "d4" ang innova a/t,sorry sir otep d2 kasi ako qatar d ko ma nakikita yung auto kaya curious lang ako sobra,wife ko lang nagmamaneho nung auto sir ,,thank ulit sir otep

Why a/t innova does't have o/d switch