Meritor 10spd not going into HI range

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by czego82, Dec 28, 2018.

Page 2 of 3
  1. Dec 28, 2018 #11
    czego82

    czego82 Light Load Member

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    Yeah thats why mechanic said its so much to replace. If the syncho was bad, would there still be air noise when switching the lever for lo and hi?
     
    czego82, Dec 28, 2018
    czego82, Dec 28, 2018
    #11
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  3. Dec 28, 2018 #12
    McMahons Trucking

    McMahons Trucking Light Load Member

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    Yes
     
    McMahons Trucking, Dec 28, 2018
    McMahons Trucking, Dec 28, 2018
    #12
  4. Dec 28, 2018 #13
    czego82

    czego82 Light Load Member

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    I went back to double check and to be more precise when in LO and switching to HI... there is NO air noise BUT when switching from HI to LO there IS air noise.....
     
    czego82, Dec 28, 2018
    czego82, Dec 28, 2018
    #13
  5. Dec 28, 2018 #14
    dibstr

    dibstr Road Train Member

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    Rather obvious, but have you drained your air tanks recently?
     
    dibstr, Dec 28, 2018
    dibstr, Dec 28, 2018
    #14
  7. Dec 28, 2018 #15
    czego82

    czego82 Light Load Member

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    Yes, regularly
     
    czego82, Dec 28, 2018
    czego82, Dec 28, 2018
    #15
  8. Dec 28, 2018 #16
    Dino soar

    Dino soar Road Train Member

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    Before you spend a lot of money it's best to start with the simple things like the air regulator on the back of the transmission, the slave valve, and the actual switch on the shifter. And check all of your Airlines including the little ones that go up into the shifter. Maybe one of them got crushed or blocked or is leaking.
     
    Last edited: Dec 28, 2018
    Dino soar, Dec 28, 2018
    Dino soar, Dec 28, 2018
    #16
  9. Dec 28, 2018 #17
    czego82

    czego82 Light Load Member

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    How would I check the regulator or the slave valve? Slave Valve kit is $230 from Meritor where entire Syncro kit is $530... both OEM
     
    czego82, Dec 28, 2018
    czego82, Dec 28, 2018
    #17
  10. Dec 29, 2018 #18
    chat1850

    chat1850 Light Load Member

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    Change the valve on the back of the transmission,that is the main air supply for your trans.
     
    chat1850, Dec 29, 2018
    chat1850, Dec 29, 2018
    #18
  11. Dec 29, 2018 #19
    czego82

    czego82 Light Load Member

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    Are you talking about the air regulator?
     
    czego82, Dec 29, 2018
    czego82, Dec 29, 2018
    #19
  12. Mar 7, 2020 #20
    charchri4

    charchri4 Bobtail Member

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    Did you ever figure out the problem? I'm on the side of the road in Phoenix with the same issue
     
    charchri4, Mar 7, 2020
    charchri4, Mar 7, 2020
    #20
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