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Class B - Automatic transmission

Discussion in 'Questions From New Drivers' started by jmnp, Sep 10, 2025 at 9:59 PM.

  1. Sep 10, 2025 at 9:59 PM #1
    jmnp

    jmnp Bobtail Member

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    New to the group. I had a question on the Class B parking brake test. Have a Class B truck with an automatic transmission. How do I test the parking brake without compounding the brake in order to shift from Neutral to Drive. Am I starting the truck, releasing the parking brake, then applying the foot brake in order to shift to drive, then pulling the parking brake with the truck in drive?
     
    jmnp, Sep 10, 2025 at 9:59 PM
    jmnp, Sep 10, 2025 at 9:59 PM
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  3. Sep 11, 2025 at 6:35 AM #2
    TripleSix

    TripleSix God of Roads

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    Question: does the Class B vehicle have air brakes or hydraulic?

    If it has air brakes, the parking brake will be spring activated, and you pushing in the valve on the dash releases this spring. Will have nothing to do with the service brakes (the foot brake).

    If the brakes on the class B truck are hydraulic, the parking brake will be a set of brake drums while the service brakes will be disc brakes. . Even so, two completely different systems.
     
    TripleSix, Sep 11, 2025 at 6:35 AM
    TripleSix, Sep 11, 2025 at 6:35 AM
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