Cobb RMM

Discussion in 'Fiesta ST Engine Upgrades' started by kryuenger, Dec 22, 2014.

  1. kryuenger

    kryuenger New Member

    Yesterday while jumping on the freeway, shifting into 2nd it sounded like the motor hit the firewall. Has anyone else had this issue?

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  3. Applejack

    Applejack Active Member

  4. BRGT350

    BRGT350 Well-Known Member Staff Member

    I have not had this happen, but I installed snow tires at the same time I did the RMM. Due to the lack of traction with the snow tires, I can't generate enough acceleration forces to have the issue.
  5. Firesail

    Firesail Active Member

    I have had mine for over 6 months and it cured that problem! With the stock RMM, I would always have a bang into the firewall sound when going fast and shifting hard 1-2 shift - no longer. Check your work.
  6. Soldjeepforst

    Soldjeepforst Member

    Same even with me doing a fuel cut launch the Cobb rmm does its job.
  7. ISO100

    ISO100 Member

    It's just the torque resistor (some call it the rear motor mount) bottoming out. Nothing is hitting the firewall.
  8. ISO100

    ISO100 Member

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