Any Eaton 13spd experts here?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Denialator03, Sep 25, 2021.

  1. D.Tibbitt

    D.Tibbitt Road Train Member

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    Is there anything to gain from using this gear ? Or is it just one of those things that is fun to say u did it but is mostly unusable?
     
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  3. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    The high side of "low", and the low side of 5th gear are near identical. I use it a lot creeping up to a stop light and making turns from a near stop. I also usually won't split low.

    I also have a whole three months of driving experience, so I may be using it wrong.

    I've repaired hundreds and always told drivers how advantageous they were, but never drove one with a load until I started trucking.
     
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  4. Hammer166

    Hammer166 Crusty Information Officer

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    Wasn't the use of the dummy discouraged to protect the splitter? After all, that's why they put the interlocks on the 13 speeds, they initially didn't have them. Going to the dummy jumps the torque to the splitter by 30-some % over 5th. Probably not a big issue for short term use, but using it climbing could be an heat issue in the auxiliary if it was an old box with the splitter in overdrive. Probably no longer an issue with RTLO's under/direct splitter.

    Ran across this gem while hunting a power flow video.

     
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  5. lester

    lester Midwest's #1 Feed Hauler

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    Nothing gained from using it no. I use it just because it's easier and quicker than dropping to the low side. I use it turning corners when fifth is just a touch to fast.
     
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  6. Hammer166

    Hammer166 Crusty Information Officer

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    This. Usually when you realize at the last second that 5th ain't gonna cut it and the extra time of a range shift means you'd likely be going to 3rd instead of 4th.
     
    Last edited: Sep 26, 2021
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  7. wore out

    wore out Numbered Classic

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    Oh it definitely has it advantages in spots. When a range shift would cost you extra time in traffic etc. I don’t think I would pull in it for a long time but short use I can’t see it hurting anything
     
  8. Dustyroads38

    Dustyroads38 Light Load Member

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    i used it as 4 high when i needed to keep rpm up off road, but couldn't travel fast enough for 5 low. 12-15 mph on dirt for hours on dirt, the extra mph made a difference in my travel time. but other than occasionally using it to keep from dropping into the lowside, (corners to sharp for 5 mainly) it is more of a novelty for those who wished they had an 18.
     
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  9. D.Tibbitt

    D.Tibbitt Road Train Member

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    Nice. I actuallly just tried it out for the first time yesterday. Its the perfect gear for turning and keep from having to drop to low side of the gearbox
     
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