Stuck under a load.Meritor Transmission will not go high

Discussion in 'Ask An Owner Operator' started by henboy1, Feb 20, 2020.

  1. henboy1

    henboy1 Light Load Member

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    10 speed transmission on a 12.7 detroit.2003 Columbia.This problem started getting worse.First, I couldnt go in HIGH and then when I am highj , I couldnt go low.Now , all of a sudden I cannot go high.Drove about 15mph in 5th gear to a safe location.Ubered and replaced the whole shift knob which has the cruise etc on top.
    It didnt fix it.Then I replaced the air solenoids and the piston at the back of the transmission(kit).Still didnt fix it.I cranked up the truck and checked the power going to the solenoids .When in High and Low.........No power getting to the solenoid.So I had a transmission guy come look at it.He said the harness was bad.He wants to change . all the harness and a bunch of all other BS like regulator valve , neutral switch and charge $750.I told him no, I only need the electrical part fixed.So, I went to freightliner and bought the 2 harness.I couldnt get the 3rd that goes to the ECM.I dont know what the transmission guys means , but he said the connector going to the ECM needs to be pinned.I havnt looked at it , but what does that mean?Another guys said the schematic for that may be proprietory.I am about to go under there tomorrow morning, but before I go and get this 3rd harness from Richard Kearns , I would like to know how to connect this harness to the ECM.This is definitely a power issue..Please advice
     
  2. Spyro2112

    Spyro2112 Light Load Member

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    Slave, is in the side, on the back of tranny two boxes change them
     
  3. henboy1

    henboy1 Light Load Member

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    Meritor range shift solenoids , I already changed both . They are not getting power . Harness is the problem . I just need to know if I need all 3 harness or just the 2 that goes to this range solenoid
     
  4. ZVar

    ZVar Road Train Member

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    Reminds me of a story...
    Wife is having trouble getting the washing machine to work. She calls the repair man who takes a look at it and bangs it on the side with a hammer to free up a stuck something. Gives the wife a bill for $100 dollars, which she promptly protested it was too much as all he did was hit it with a hammer. So he gave her an itemized invoice.
    1. $5. Hitting the thing.
    2.$95. Knowing where to hit.

    My point is, pay the transmission guy. He knows what to hit to make it right.
    Also, how much is all this downtime costing?
     
  5. Spyro2112

    Spyro2112 Light Load Member

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    Change the hi low button and or handle
     
  6. Spyro2112

    Spyro2112 Light Load Member

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    Look to see if slave is leaking, probably the handle
     
  7. Mid-May Trucker

    Mid-May Trucker Heavy Load Member

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    How long have transmissions been around?
     
  8. henboy1

    henboy1 Light Load Member

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    The transmission guy is on his way . $800 to run a power line to the harness and change the filter regulator. I have done most of the work . I just couldn't find the power source on the tranny . Down there has been rigged. If this mf dont come by 11 am tomorrow I will try to run a power from tje ignition and tie it into the harness I just purchased. I have done half of his job . Bottom plate _ removed, solenoids and shifter all changed smh . Not having a good day . I will be in it $1600
     
  9. henboy1

    henboy1 Light Load Member

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    Fixed. The wires in the pipe shorted out . Not the shift knob that I purchased
     
  10. Spyro2112

    Spyro2112 Light Load Member

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    Is it electric or air, maybe should have said, great hit the road
     
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