systems
    5 min read

    Transmission Systems Explained: Automatic, Manual, CVT, DCT, AMT

    Transmissions are second only to engines in repair cost. Knowing the type drives the service plan.

    The real problem

    'Lifetime fluid' is marketing, not reality. Most automatics still benefit from fluid service at 60–100K mi.

    By the numbers

    Avg automatic rebuild cost
    $2,500–$5,500
    Avg CVT rebuild/replace
    $3,000–$8,000
    Fluid service interval (typical)
    60–100K mi

    Types

    Automatic (planetary gears + torque converter), CVT (variable pulleys + steel belt), DCT (two clutches, fast shifts), AMT (automated manual — common in heavy duty).

    Service done right

    Flush vs drain-and-fill: drain-and-fill is safer on neglected units. Always use the OEM-spec fluid — wrong fluid kills CVTs especially fast.

    Frequently asked questions

    Is CVT reliable?

    Modern CVTs are reliable when fluid is serviced on schedule. Skipped service is the #1 failure cause.

    Sources

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