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Thread: Understanding gear shifting Vitz 2004 Automatic

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    Default Understanding gear shifting Vitz 2004 Automatic

    Hi PakWheelers,

    I have recently bought Vitz 2004 1000 CC automatic and just want to learn something which I couldn't figure until yet. I am new to automatic transmission so my question is of novice nature but I hope someone who is experienced can easily and quickly answer this.

    I normally drive with light foot and feel gear shifting at the speed of

    0 --> 14-16 (then it shifts to 2nd gear)
    14-16 --> 28-30 (then it shifts to 3rd gear)
    28-30 --> 42-44 (then it shifts to 4th gear)

    My question is when we say it is a 4 speed vehicle does it mean it has 4 gears? but as the maximum speed is 160 KM/h so does it mean it goes from 42-44 KM/h upto 160 KM/h in 4th gear?

    Also if I turn O/D off then how does it affect the gear shifting based on above understanding?

    * The difference between genius and stupidity is that genius has its limits *

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    you got it right
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    .....................
    Ministry of MAFIA!

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    Quote Originally Posted by ussi View Post
    bro better to buy a vxri upper model and then get eps installed in it, vxl has power steering but its hydraulics and its a bit hard as compared to eps
    wakeup buddy

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    Quote Originally Posted by quaidian View Post
    Hi PakWheelers,

    I have recently bought Vitz 2004 1000 CC automatic and just want to learn something which I couldn't figure until yet. I am new to automatic transmission so my question is of novice nature but I hope someone who is experienced can easily and quickly answer this.

    I normally drive with light foot and feel gear shifting at the speed of

    0 --> 14-16 (then it shifts to 2nd gear)
    14-16 --> 28-30 (then it shifts to 3rd gear)
    28-30 --> 42-44 (then it shifts to 4th gear)

    My question is when we say it is a 4 speed vehicle does it mean it has 4 gears? but as the maximum speed is 160 KM/h so does it mean it goes from 42-44 KM/h upto 160 KM/h in 4th gear?

    Also if I turn O/D off then how does it affect the gear shifting based on above understanding?
    All i can say,keep that O/D button pressed.

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    Default same query but for civic

    hmmm
    i wanted to create similar thread but for civic 04 auto
    sometimes when i floor it,the rpm goes to 4 5k at 40 speed but if i pick my foot n floor it again,the rpm reaches 5k again
    so i tried keeping it floored n it reached 60 n then shifted gear,same thing happened with me at 100speed,i picked foot n floored but everytime rpm reached 5k maybe i need to keep it pressed so that speed can go up n then it changes?
    also do i need to pick my foot every time off the race so gear can shift or there is no such need n it will shift in any case like it does at light foot

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    Quote Originally Posted by Hesab_Magsi View Post
    All i can say,keep that O/D button pressed.
    edit agreed
    RIP

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    Edited :d

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    Keep the overdrive button pressed for better mileage. If you are driving fast, then unpress/release it.

    (Civic auto experience) I pressed the accelerator pedal softly and it drove and shifted gears quickly into higher gears for more mileage but as soon I gave it more gas, it down-shifted asap. So to drive fast, keep the pedal pressed.

    I heard people saying that no burnouts on auto trans, so I floored the accelerator and shifted the gear from P to drive. A good burnout followed and that bs about no burnout on auto was debunked.

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    Quote Originally Posted by NakedTruth View Post
    Keep the overdrive button pressed for better mileage. If you are driving fast, then unpress/release it.

    (Civic auto experience) I pressed the accelerator pedal softly and it drove and shifted gears quickly into higher gears for more mileage but as soon I gave it more gas, it down-shifted asap. So to drive fast, keep the pedal pressed.

    I heard people saying that no burnouts on auto trans, so I floored the accelerator and shifted the gear from P to drive. A good burnout followed and that bs about no burnout on auto was debunked.
    and completely effed up the transaxle too, the transmission cannot take the intense shock you just subjected it to, mostly probably you overheated the first clutch pack and band to the point of sizzling.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Quote Originally Posted by Xulfiqar View Post
    and completely effed up the transaxle too, the transmission cannot take the intense shock you just subjected it to, mostly probably you overheated the first clutch pack and band to the point of sizzling.
    Who gives a fu*k. I had to try it.

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    Quote Originally Posted by NakedTruth View Post
    Who gives a fu*k. I had to try it.
    your car your money, and thank you and everyone else for doing that, it kept ZRS well into the green, I usually had 10 "raced or burnaat" transmissions in a month on average.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Yes, a conventional 4-speed auto means it has 4 forward gears (akin to a Suzuki Mehran).<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o:p></o:p>
    <o:p></o:p>
    Now, the top speed of your vehicle (be it 160 or 170) is attainted in 4th gear just like putting a mehran in 4th (at 40km/h) and start to press the gas pedal. The speed will climb and the car will reach its top speed eventually (please don't this on a mehran at least <o:p></o:p>
    <o:p></o:p>
    The O/D button engages the 4th gear. When O/D is turned off, the vehicle will not shift into 4th gear. Use the O/D for fuel economy as it keeps the engine revs lower when compared to the 3rd gear.<o:p></o:p>
    -

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    Quote Originally Posted by NakedTruth View Post
    Who gives a fu*k. I had to try it.
    Wait a minute, are'nt you the same guy who was very touchy with his cultus and cursed his father for no particular reason. And now you say who gives a "fu*k" when you screwed an auto??? WOW.

    How about daddy cursing you now, rather "confront" you now (as i recall the exact words) if it was done on his money???

    https://www.pakwheels.com/forums/eng...rk#post3203027

    @Poster. Sorry for being off topic-Ajkal k bachay kuch zyada hi shareer hn. Koi kuch keh day to pehlay fancy ho jatay hn (e.g. who gives a fu*k), phir pappa ko shikayat lagatay hn (report abuse). Hope you get the point
    The Soul's Journey After Death in Islam (www.bit.ly/SoulsJourney) -- Originally Shared by kse101

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    Quote Originally Posted by moizhusain View Post
    Yes, a conventional 4-speed auto means it has 4 forward gears (akin to a Suzuki Mehran).<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o:p></o:p>
    <o:p></o:p>
    Now, the top speed of your vehicle (be it 160 or 170) is attainted in 4th gear just like putting a mehran in 4th (at 40km/h) and start to press the gas pedal. The speed will climb and the car will reach its top speed eventually (please don't this on a mehran at least <o:p></o:p>
    <o:p></o:p>
    The O/D button engages the 4th gear. When O/D is turned off, the vehicle will not shift into 4th gear. Use the O/D for fuel economy as it keeps the engine revs lower when compared to the 3rd gear.<o:p></o:p>

    the 3rd gear in an autobox is 1:1 which is the 4th gear of Mehran or any other general car now, the 4th gear in an autobox is "overdrive" which the O/D stands for.

    older cars had a green O/D button that engaged final ratio to accelerate the car further and reduce rpm, newer cars have an O/D off button that prohibits the transmission from shifting into last gear.

    modern 5, 6, 7 and 8 speed automatics are different, their O/D is their last gear and their TC also lock up at speed.

    the OP is forgetting that the autobox also has a kickdown function, meaning it will downshift gears upon driver accelerator position comparing to speed and on full throttle the transmission will shift gears at engine redline rpm. So it may engage 4th at 40 km/h, but pressing the accelerator full at this time will cause the transmission to drop to 2nd gear, accelerate hard to 95 km/h shift into 3rd accelerate to 125 km/h then shift to 4th, lock the convertor and the car will keep on going till its top speed.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    For a prosmetic and probably all automatics, how much the gas paddle is pressed tells the ecu (electronic control unit) of the car how aggressively you want to drive the car.
    If you just press the peddle very slightly it will accellerate and change gears as if you are driving a manual with a relaxed and laid back manner, that is not accelerating too fast and just changing gear on the earliest possible moment considering the performance position of the engine.
    My civic prosmetic changes gear at this stage when the rmp is just between 2.5k and 3k and if i am on a strait road it generally tries to keep the rmp between 2k and 2.5k
    This is the most fuel efficient
    My civic has no problem in this scenario as many would think that i am killing the engine as the engine has enough torque to move the car with ease, it goes to around 80km/h and i am still getting a 2k rpm and i effectively use this in Islamabad in my commute. and its not harm in getting to the next level when needed

    If you press the pedal hard the ecu detects that you are driving the car more aggressively and thus it changes the gear in a more aggressive manner and that is it takes longer to change gears and lets the engine rev up more than before. In this situation my civic prosmetic changes gear after reving up to about 3.5k to 4k and tries to keep the rpm at around 3k to 3.5k
    This gives good acceleration but consumes more fuel

    if you really go hard and press the pedal to the floor the ecu in a civic prosmetic go to the most aggressive setting and red lining the rmp before every change that is going even beyond 5.5k before changing and tries to keep the rmp as high as possible
    this is the most effective for very high acceleration as it uses all the power range of the engine, but its the most fuel hungry

    When ever you move from one setting to the lower (by pressing the pedal down further into that range) the ecu shifts down from the current gear. If you are moving in the first and most laid back stage and you press the pedal to the floor the ecu shifts down two gear at once.


    And you dont need to lift the foot to change the gear, you just need to adjust it so the ecu does not think that you want to go harder on acceleration. But yes sometimes just letting some pressure off the pedal will make the ecu engage the top gear if its not engaged yet. sometimes my civic even engages the overdrive and goes below 2k when in the first scenario

    I hope it helps


    Quote Originally Posted by chaudhary9 View Post
    hmmm
    i wanted to create similar thread but for civic 04 auto
    sometimes when i floor it,the rpm goes to 4 5k at 40 speed but if i pick my foot n floor it again,the rpm reaches 5k again
    so i tried keeping it floored n it reached 60 n then shifted gear,same thing happened with me at 100speed,i picked foot n floored but everytime rpm reached 5k maybe i need to keep it pressed so that speed can go up n then it changes?
    also do i need to pick my foot every time off the race so gear can shift or there is no such need n it will shift in any case like it does at light foot
    The JuGnO of Isb -- a ToucH of ElegancE and ExcellencE
    Nikon D7000, Nexus 4 (rooted, Paranoid), Honda City 2010 Pearl Black

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    ^^ the old full hydraulic automatics also had kickdown, it was controlled by a cable.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    its very informative discussion so far - you guys are really awesome :-)
    * The difference between genius and stupidity is that genius has its limits *

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    What I understand from the discussion, for better fuel efficiency one should use light foot, allow gear shifting earlier at lower RPM and keep O/D turned on to fully use the top gear. Is there any harm to engine with this kind of less-aggressive driving?
    * The difference between genius and stupidity is that genius has its limits *

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    Quote Originally Posted by quaidian View Post
    What I understand from the discussion, for better fuel efficiency one should use light foot, allow gear shifting earlier at lower RPM and keep O/D turned on to fully use the top gear. Is there any harm to engine with this kind of less-aggressive driving?
    In an automatic there is absolutely no harm, as the ecu knows when is the best time to do this, in a manual car though this is a risk, cuz you have to know and understand what is the proper rmp range (engine power band) that you should adopt for changing gears
    In an automatic car all this information about the engine power ranges are already fed into the ecu system

    by the way, as i described in my previous post that there are three different settings, that is in reference to civic prosmetic car (mine is 2002 model so this information can easily be applied to models upto 2006) i believe later models have the same settings though a bit optimized.
    The JuGnO of Isb -- a ToucH of ElegancE and ExcellencE
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