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Is a 9 speed a good otr truck?

Discussion in 'Ask An Owner Operator' started by scoobertdoo, Dec 21, 2020.

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  1. Dec 21, 2020 #1
    scoobertdoo

    scoobertdoo Road Train Member

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    According to what I am reading a nine-speed is just a 13-speed without a splitter. Does that mean 9th gear is going to be an overdrive? I just keep seeing these peterbilts with nine speeds in them and I'm concerned that they would be geared too low.
     
    scoobertdoo, Dec 21, 2020
    scoobertdoo, Dec 21, 2020
    #1
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  3. Dec 21, 2020 #2
    AKDoug

    AKDoug Medium Load Member

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    There are pages of different configuration 9 speeds. Some are 1.0 on 9th, but most are overdrive. Some are convertible easily to a 13sp.
     
    AKDoug, Dec 21, 2020
    AKDoug, Dec 21, 2020
    #2
    Roger McG and Rideandrepair Thank this.
  4. Dec 21, 2020 #3
    MACK E-6

    MACK E-6 Moderator Staff Member

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    All the ones I've driven certainly got the job done, but a 13 is definitely better.

    They do alright if you have enough engine.
     
    MACK E-6, Dec 21, 2020
    MACK E-6, Dec 21, 2020
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    Rideandrepair and Bean Jr. Thank this.
  5. Dec 21, 2020 #4
    Cat sdp

    Cat sdp . .

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    The jump from 8th to 9th usually sucks...... but it’ll get the job done.

    The overall gearing to worry about is in the rear ends......
     
    Cat sdp, Dec 21, 2020
    Cat sdp, Dec 21, 2020
    #4
    Roger McG, Rideandrepair and Bean Jr. Thank this.
  7. Dec 21, 2020 #5
    BackwoodsGA

    BackwoodsGA Road Train Member

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    Gotta be a 13.
     
    BackwoodsGA, Dec 21, 2020
    BackwoodsGA, Dec 21, 2020
    #5
    D.Tibbitt and Rideandrepair Thank this.
  8. Dec 21, 2020 #6
    Cat sdp

    Cat sdp . .

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    Correction.....18
     
    Cat sdp, Dec 21, 2020
    Cat sdp, Dec 21, 2020
    #6
    feldsforever, Vampire, LameMule and 3 others Thank this.
  9. Dec 21, 2020 #7
    Rideandrepair

    Rideandrepair Road Train Member

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    I had a 9 spdOD in a 1992 WS. Hooked to a 425 Cat and 390 rears. I liked it. 8th direct gear had long legs, That made it fun to drive. Did everything a 10 spd would do.
     
    Rideandrepair, Dec 21, 2020
    Rideandrepair, Dec 21, 2020
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    feldsforever, Cat sdp and D.Tibbitt Thank this.
  10. Dec 22, 2020 #8
    black_dog106

    black_dog106 Road Train Member

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    9 speed?
    Good transmission, in a mega carrier truck. :occasion5:
     
    black_dog106, Dec 22, 2020
    black_dog106, Dec 22, 2020
    #8
  11. Dec 22, 2020 #9
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    It worked out, I drove them to start with, and the jump from a 9 to 13 or 18 is easier.

    Been in 10 speeds mostly since forever, it seems. And I don't like automated.
     
    25(2)+2, Dec 22, 2020
    25(2)+2, Dec 22, 2020
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    tommymonza Thanks this.
  12. Dec 22, 2020 #10
    scoobertdoo

    scoobertdoo Road Train Member

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    I've put 80,000 miles on an automated and hate it.
    I'm used to driving 18s and I struggle to drive a 10 because I always seem to forget 6th gear. hell I'll even take the Maxi torque 18 over this automated junk I'm driving now.
     
    scoobertdoo, Dec 22, 2020
    scoobertdoo, Dec 22, 2020
    #10
    D.Tibbitt and feldsforever Thank this.
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