![]() | #2776 |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Ban Chang
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| ![]() Yeah, I get those numbers in S mode using paddles, where the tranny can be shifted. In normal mode it will probably shift a little later, taking advantage of the torque curve. Your 3-4 and 4-5 numbers are same as what I experience. My car is Mar 07, so it does not display gear numbers in D mode. I think that feature was added later in 07 or in 08 models. Last edited by dot : 27th January 2012 at 14:31. |
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![]() | #2777 |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Gurugram
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| ![]() In tune with what my GPS tells me. Starting at about 3kph it rises to 5 kph at about 100kph. Not very surprising since may countries allow something like +0 -5% on the calibration. |
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![]() | #2778 | |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Ban Chang
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![]() | #2779 | |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Gurugram
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To improve consumption I often ease on the pedal momentarily to get an additional shift and then drive gently. Is the same on my Santro as well. | |
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![]() | #2780 | |||
BHPian Join Date: Aug 2011 Location: Pune
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I stay at Wakdewadi (And see a TBHP stickered Silver Laura in my Society) and in fact I hardly go into the thick traffic areas apart from getting stuck at Shoppers' Stop(shivajinagar) traffic Jam 1-2 times a week. The rest is smooth running in 'relatively' sparse traffic. Most drives are either to Pimpri(Old Mumbai Highway) / Khadkee / Viman-Nagar(Sangamwadi Road) so its not as congested as say Satara / JM / FC road. Anyways, I am PMing you my no. Please do have a look. Quote:
Actually the FE used to be higher prior to the service (8.7ish), hence the irritation. What tyres do you use? Though the tires have enough tread as of now so they won't be going out very soon. I think so too. It takes an awful lot of time before it shifts to 5th and in case I am doing 60-65 due to ambient traffic (on old highway), I end up driving in 4th all the time. I guess that is definitely hurting the FE. | |||
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![]() | #2781 |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Gurugram
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| ![]() Do not forget the very tall gearing on fifth. Adds up to 50 kph/1000rpm! So you will have a high upshift point into fifth. Last edited by sgiitk : 27th January 2012 at 15:53. |
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![]() | #2782 |
BHPian ![]() Join Date: Aug 2008 Location: Tuticorin
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| ![]() Here are the gear-ratios on the AT (courtesy Overdrive mag in 2006) Gear - kmph/1,000rpm 1 - 9.89 2 - 17.19 3 - 25.82 4 - 36.63 5 - 50.34 So it is approx. 2,000 rpm at a steady 100 kmph in 5th gear on the AT (as sgiitk has said). (I have these on a spreadsheet and can work out different combinations quickly). Last edited by manim : 28th January 2012 at 11:04. |
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![]() | #2783 |
BHPian Join Date: Aug 2011 Location: Pune
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| ![]() So I checked it up today morning. It definitely doesn't stay in 5th @ 55kmph. Whatever I did, It refused to upshift before 65. Then I eased off the throttle momentarily just to see at what speed it downshifts. The downshifts were happening at 59. Not even sport mode helped me get to 5th @55kmph. I am not trying to hypermile all the time but when cruising on a city road, The transmission should ideally shift to top gear if there is no acceleration involved. Last edited by antz.bin : 28th January 2012 at 14:55. Reason: typo |
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![]() | #2784 |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Ban Chang
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| ![]() In that case it is possible that the TCU needs to be reset. This might also explain the less than optimum FE. Best option would to be visit Deccan Honda and let them handle it. |
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![]() | #2785 | |
BHPian Join Date: Aug 2011 Location: Pune
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![]() Can Resetting the ECU help me with that? Since I was under the impression that it is the ECU that controls the shifts.(I assumed it ![]() | |
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![]() | #2786 | |
Team-BHP Support ![]() ![]() Join Date: Dec 2006 Location: Mumbai
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Get into your car, shut the door etc, and turn the key full on to the point just before it cranks. Press the accelerator fully to the floor and hold it there for 30 seconds. After that don't touch the key, or door or anything but sit and wait for 2 minutes. Then start the car and drive off. You should notice a difference in the way the throttle and transmission behave. | |
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![]() | #2787 | |
Distinguished - BHPian ![]() ![]() Join Date: Sep 2008 Location: Bangalore
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I am amazed at the ways these engineers design their products ![]() | |
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![]() | #2788 | |
Team-BHP Support ![]() ![]() Join Date: Dec 2006 Location: Mumbai
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Basically the transmission adapts itself to a user, and his way of driving and also the driving conditions. This is a way to reset that back to the default setting and let the transmission start learning again. | |
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![]() | #2789 |
Senior - BHPian ![]() Join Date: Dec 2007 Location: Ban Chang
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| ![]() Apparently the TCU is embedded in the ECU. So do try what Akshay1234 just suggested ( I will try it too!) and if that does not work, one can reset the ECU by taking off both the terminals of the battery for 5-10 mins. Then restart and let the car idle for 5-10 mins. Hope it will solve the issue. Last edited by dot : 28th January 2012 at 21:28. |
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![]() | #2790 |
BHPian Join Date: Aug 2011 Location: Pune
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| ![]() Thanks Akshay! you are a sweetheart!! It worked ![]() I did exactly as told immediately after I read the post. First the RPM was raised to 13xx RPM. I could see the RPM fluctuating, so it wasn't like the steady 1200 RPM like it happens in the morning when the car warms up. So I let it idle for a minute and a half till it settled down to somewhere around 850 RPM. I felt I should have idled it more but I left fast since I was in a hurry. Anyways, long story short, the car now requires me to feed less throttle for it to jump forward. Couldn't check the shift points due to traffic but I did see some improvement. Will check and report. Thanks a lot guys ![]() |
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