15 speed double OD

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Stroked F550, Nov 9, 2009.

  1. Stroked F550

    Stroked F550 Medium Load Member

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    Does anyone know the shift pattern for a 15 speed double OD? its on a 96 Pete 379 if that helps.

    thanks,
    Andy
     
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  3. pullingtrucker

    pullingtrucker Road Train Member

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    Low Range

    R 2 3
    |-|-|
    1 4 5

    All bottom gears can be split

    High Range
    R 7 8
    |-|-|
    6 9 10

    High range can't be split.

    This was the shift pattern of the 15 speed I had years ago.
     
    Stroked F550 Thanks this.
  4. Stroked F550

    Stroked F550 Medium Load Member

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    thanks pulling trucker

    I heard something about the 15s having an X pattern was that way before 96?
     
  5. pullingtrucker

    pullingtrucker Road Train Member

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    The pattern I gave you was out of my Pete, but I can't remember if it was a double over or the year. Short term memory loss due to the fact it was a company ride.
     
  6. Stroked F550

    Stroked F550 Medium Load Member

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    well hopefully its the same pattern that you mentioned
     
  7. L.B.

    L.B. Third Generation Truck Driver

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    The 15 I drove did not split the lower gears, it was a double reduction in the lower 5. You could go from the reduction gears (1-5) and hit the spliter to go to 4th, then continue on up the high side.
     
  8. rwings

    rwings <strong>"Jet Force"</strong>

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    I drove a 97 379 that had the same shift pattern. I didn't use the double reduction gears unless I was loaded heavy and starting out on a hill.
     
    1989 Pete Thanks this.
  9. 1989 Pete

    1989 Pete "Pine Tree Eater"

    That's a good tranny I have one!.what DO YOU HAUL?
     
  10. Stroked F550

    Stroked F550 Medium Load Member

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    cars mostly but I am going to start hauling equipment and freight on my step deck
     
  11. Rock hauler

    Rock hauler Light Load Member

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    Never saw a 15 shift like that, mine was just like a 10 speed. on the newer one, RTX. the old one the last two holes were reversed (4@5 holes) RTO. 5th, 10th, and 15 were against the dash. the lower 5 gears were like LB say's, but you can go from 3 to six or a couple of ways
     
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