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Too much torque for spicer 6x4 transmission?

Discussion in 'Peterbilt Forum' started by Thefugitive, Sep 7, 2018.

  1. Sep 7, 2018 #1
    Thefugitive

    Thefugitive Bobtail Member

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    Sep 7, 2018
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    small 6 truck peterbilt fleet. Currently, all my trucks are 2014 or newer 389’s. However, I recently ran across someone that had a 2011 Peterbilt 389 glider with a c16 motor. The motor has all new parts on it and has only been in the truck 4 months. The transmission is an 18 speed and itneeds replacing. I have an spicer 6x4 sitting in my garage; wanted to know is this too much torque for that tranny? The truck is almost show quality and would only be driven by me twice a week for maybe 1600 miles. Any thoughts would be appreciated. Thanks
     
    Thefugitive, Sep 7, 2018
    Thefugitive, Sep 7, 2018
    #1
    KB3MMX Thanks this.
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  3. Sep 8, 2018 #2
    201

    201 Road Train Member

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    I'm not the best on tranny's, but I highly doubt it's too much for the 6x4. I mean they pulled tanks with those boxes.
     
    201, Sep 8, 2018
    201, Sep 8, 2018
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    Oldironfan Thanks this.
  4. Sep 8, 2018 #3
    baha

    baha Road Train Member

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    They put them behind 3408 cats in the 70s
     
    baha, Sep 8, 2018
    baha, Sep 8, 2018
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    Oldironfan, wore out and Oxbow Thank this.
  5. Sep 8, 2018 #4
    Rubber duck kw

    Rubber duck kw Road Train Member

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    How hot is this c16? There's a local guy here who tried putting those in a new truck behind a cat that I'm sure had 800 horse or better and he gave up on keeping them in there and went back to 18 speed, he replaced them 2 or 3 times in a couple years is what I was told.
     
    Rubber duck kw, Sep 8, 2018
    Rubber duck kw, Sep 8, 2018
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    KB3MMX and Oldironfan Thank this.
  7. Sep 8, 2018 #5
    Zeviander

    Zeviander Road Train Member

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    As far as I've heard, they don't do well behind modern, high-torque motors. If you put too much into them, they'll shred the box. They aren't rated for more than 1650 from what I've read.

    It would be nice if someone could build a modern version of the two-stick transmissions though.
     
    Zeviander, Sep 8, 2018
    Zeviander, Sep 8, 2018
    #5
    KB3MMX and Rubber duck kw Thank this.
  8. Nov 17, 2018 #7
    Jensen

    Jensen Bobtail Member

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    Nov 17, 2018
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    If you are interested in selling the 6x4 to help fund the 18 speed let me know. I am a serious buyer with cash and would purchase immediately.
    Thanks
    Jensen Hamilton
    973-583-9595
     
    Jensen, Nov 17, 2018
    Jensen, Nov 17, 2018
    #7
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