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Matching mack wirth fuller

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by john510, Jun 24, 2025.

  1. Jun 24, 2025 #1
    john510

    john510 Bobtail Member

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    Jun 22, 2011
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    Will a 1986 Mack E6 motor mount up to a Fuller 7 speed TX14607B tranmision that came out of a mack E7 and work?
     
    john510, Jun 24, 2025
    john510, Jun 24, 2025
    #1
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  3. Jun 24, 2025 #2
    BoxCarKidd

    BoxCarKidd Road Train Member

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    I want to say sure. Work? Lots of ratio options. It will bolt up and run.
     
    BoxCarKidd, Jun 24, 2025
    BoxCarKidd, Jun 24, 2025
    #2
  4. Jun 24, 2025 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Lots of things to thank about. Do you have one of these half cab things with the engine tilted. That probably will not match up. Fullers have 3 different shift tower top plates. Shifter front center or rear? Different off set shift levers off the tower. Then you know driveshaft size and length. Electrical or mechanical speedo?
    I have done several. Look long before you jump into that.
     
    BoxCarKidd, Jun 24, 2025
    BoxCarKidd, Jun 24, 2025
    #3
  5. Jun 24, 2025 #4
    john510

    john510 Bobtail Member

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    Jun 22, 2011
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    Actually I installed it and it bolted right up but for some reason it is sticking in gear but if I shut it off , I can run threw the gears with no problem, but when running it will not come out of gear any ideas?
     
    john510, Jun 24, 2025
    john510, Jun 24, 2025
    #4
  7. Jun 25, 2025 #5
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Clutch disc in backwards? Dirty input shaft? Worn splines?
     
    BoxCarKidd, Jun 25, 2025
    BoxCarKidd, Jun 25, 2025
    #5
    Star Rider and Big Road Skateboard Thank this.
  8. Jun 25, 2025 #6
    Star Rider

    Star Rider Road Train Member

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    Sep 23, 2019
    Michigan
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    Did your pilot bearing in the flywheel have a snap ring on it? The snap ring is only used with a Mack transmission. When using a Fuller transmission it must be removed and the pilot bearing driven the rest of the way in.

    upload_2025-6-25_21-6-46.jpeg
     
    Last edited: Jun 25, 2025
    Star Rider, Jun 25, 2025
    Star Rider, Jun 25, 2025
    #6
    BoxCarKidd Thanks this.
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