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Mack Truck Q & A

This forum is for pressing questions concerning Mack Trucks...emergency maintenance questions, pre-purchase questions, etc...answers can be rated by users and the higest rated answers will show first!

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  1. Engine swap ecm communication cable

    Asked by MarshallMitchell,

    0 votes
    0 answers

  2. Brake lights NOT working

    Asked by Strucking101,

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    0 answers

  3. EM6 fuel filter

    Asked by cruiseliner64,

    0 votes
    0 answers

  4. 85 MH613 cab mount bushings

    Asked by Ryon Hess,

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    0 answers

  5. Heat/ac stopped working

    Asked by Timk,

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1,097 questions in this forum

  1. 2 valve jake adjustment

    Asked by 88RD688S,

    0 votes
    0 answers

  2. 1988 or 1989 RD688S

    Asked by rjs,

    0 votes
    3 answers

  3. owner operator

    Asked by DCPS Inc.,

    0 votes
    2 answers

  4. Mack 18 speed transmission when on high range on the throttle it pulls fine then I let off the throttle it goes in to neutral and make a terrible grinding noise any idea what wrong?

    Asked by Kirby Hawk,

    0 votes
    8 answers

  5. 95 CH 613 E7 350 Air in fuel system

    Asked by 95CH613,

    0 votes
    5 answers

  6. Driver

    Asked by Terry Walton,

    0 votes
    0 answers

  7. 1987 RW713 Superliner hood latch

    Asked by Carol,

    0 votes
    1 answer

  8. Gmc cracker box

    Asked by Billyh,

    0 votes
    0 answers

  9. Manual Regin

    Asked by Jeanetta Garrett,

    0 votes
    1 answer

  10. Parking valve

    Asked by Blacka007,

    0 votes
    0 answers

  11. Parking valve

    Asked by Blacka007,

    0 votes
    0 answers

  12. 2002 Mack Ch 427 6-4 codeJ1939 link

    Asked by Jomorisn,

    0 votes
    1 answer

  13. 17 Mack pinnacle

    Asked by MacDragyn,

    0 votes
    8 answers

  14. 1999 E7 427 Good Engine?

    Asked by RAYSFLIGHT,

    1 vote
    0 answers

  15. R 700

    Asked by ws721,

    0 votes
    2 answers

  16. oil consumption

    Asked by CV7132005,

    0 votes
    4 answers

  17. Plani drive information

    Asked by gedfleet,

    0 votes
    1 answer

  18. Mack rd688s 2003

    Asked by Zachman15,

    0 votes
    1 answer

  19. High pitched humming under acceleration

    Asked by Sanhell,

    0 votes
    0 answers

  20. 1997 mack e427hp

    Asked by 97mack427,

    0 votes
    3 answers

  21. Excess oil

    Asked by Mike E,

    0 votes
    0 answers

  22. Help.

    Asked by karencarroll,

    0 votes
    2 answers

  23. Trev

    Asked by Trev,

    0 votes
    0 answers

  24. 2019 granite wiper delay

    Asked by vinny933,

    0 votes
    0 answers

  25. MP7 boost pop

    Asked by Midwest Farmer,

    0 votes
    5 answers

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