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Thread: Are 9 speeds too much?

  1. #1
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    Are 9 speeds too much?

    I don’t like transmissions that hunt around constantly.
    Is the 9 speed so imperceptible that you don’t notice all the changes?.
    What minimum speed gets you into 9th?.

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    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~

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    Personal experience is the 9 speed is fine - just like the 8 speed in the larger vehicles. It doesn't hunt at all. The extra gears just means the car has a broader choice available to ensure optimal engine torque and power are available and for that reason would help to avoid hunting.
    Cheers,

    Sean

    “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” - Albert Einstein

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    What speed do you have to reach before it goes into 9th?.

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    Quote Originally Posted by Nagaman View Post
    What speed do you have to reach before it goes into 9th?.
    I'll have to check. It's my wifes car so I won't have the opportunity until the weekend. Don't forget, the engine specs will also dictate when the gear changes will happen. Engines with lower torque/power output will be more likely to use the lower ratios more often.

    Are you asking because you are looking to buy or do you have one already?
    Cheers,

    Sean

    “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” - Albert Einstein

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    Quote Originally Posted by SBD4 View Post
    I'll have to check. It's my wifes car so I won't have the opportunity until the weekend. Don't forget, the engine specs will also dictate when the gear changes will happen. Engines with lower torque/power output will be more likely to use the lower ratios more often.

    Are you asking because you are looking to buy or do you have one already?
    I’m definitely in the market.......it’s just a matter of time and there is the update coming which makes it even more interesting. A higher info ‘screen’ would be an improvement from my perspective.

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    Quote Originally Posted by Nagaman View Post
    I’m definitely in the market.......it’s just a matter of time and there is the update coming which makes it even more interesting. A higher info ‘screen’ would be an improvement from my perspective.
    Excellent! What spec trim/engine are you aiming for?

    Definitely be sure to get what you want. Too much money being spent to have regrets. Buying my RRS was a bit of a rush. Consequently there are things I missed out on that I really regret not having.
    Cheers,

    Sean

    “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” - Albert Einstein

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    Quote Originally Posted by SBD4 View Post
    Excellent! What spec trim/engine are you aiming for?

    Definitely be sure to get what you want. Too much money being spent to have regrets. Buying my RRS was a bit of a rush. Consequently there are things I missed out on that I really regret not having.
    I’m looking to buy an SE and the basic diesel is fine . I don’t intend to get sucked into expensive options either.

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    More torque = no hunting around for gears😎
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈

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    This information is probably a bit more like what you are looking for. You can see below that at 1000 RMP in 9th the car will be doing 72 KPH. when doing 100Kph the engine will be sitting at just under 1400RPM which it will do very comfortably (SD4 420nm/140Kw). As Justin said above, the more torque the more inclined the engine will be to use a higher ratio at a lower RPM:

    Gearbox: ZF 9HP48
    Transmission type: automatic
    with CommandShift manual shift mode
    Number of gears: 9
    Gear ratios (overall):
    I 4.7 (18.54)
    II 2.84 (11.2)
    III 1.91 (7.53)
    IV 1.38 (5.44)
    V 1 (3.94)
    VI 0.81 (3.19)
    VII 0.7 (2.76)
    VIII 0.58 (2.29)
    IX 0.48 (1.89)
    X ()
    R 3.81
    Speed range
    (max speed on gears,
    top gear value theor.): (km/h/mph)
    I: 33 / 21
    II: 55 / 34
    III: 82 / 51
    IV: 113 / 70
    V: 156 / 97
    VI: 192 / 119
    VII: 223 / 139
    VIII: 269 / 167
    IX: 325 / 202
    X: /
    1000rpm speed: (km/h/mph)
    I: 7.4 / 4.6
    II: 12.2 / 7.6
    III: 18.1 / 11.2
    IV: 25.1 / 15.6
    V: 34.6 / 21.5
    VI: 42.7 / 26.5
    VII: 49.5 / 30.8
    VIII: 59.7 / 37.1
    IX: 72.1 / 44.8
    X: /
    Torque converter factor:
    Final drive ratio std: 3.944
    Cheers,

    Sean

    “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” - Albert Einstein

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