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Sonnax 28821-10K

Smart-Tech Ratio-Style Servo Kit

Sonnax 28821-10K

852-28821-10K

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Sonnax 28821-10K Smart-Tech Ratio-Style Servo Kit $210.44
Smart-Tech Ratio-Style Servo Kit
  • Compatible With OE Powerglide Servo Pistons
    Includes:
  • Servo Assembly
  • Cover Gasket
  • Case-to-Cover O-Ring
  • Servo Pin Seals
  • Primary Piston Seals
  • Return Spring
  • Cover Bolts

  • Sonnax 28821-10K Details

    Servo Kits

    The OE Powerglide servo design is inherently flawed. Its spring-powered design suffers from an improper apply/release ratio that is responsible for otherwise unexplained band failures, input shaft failures and staging issues. Now known as the pin bias effect, the resulting burnt bands, broken parts and inconsistent operation have plagued the Powerglide for years.

    Sonnax Smart-Tech® ratio-style servo kit is a revolutionary part that conquers the pin bias effect once and for all, making this the ultimate choice for running Powerglides in ever more extreme applications. The unique design has the same apply area as the OE Powerglide servo, but increased release area so the servo is hydraulically released like other modern servos.

    In high performance applications where a larger servo is desired, the Sonnax Servo Kits provide a larger apply area. The Sonnax servo is calibrated to progressively increase band apply force as line pressure increases. Sonnax servos are the perfect upgrade for more holding power without excessively harsh shifts.

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