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Sonnax Race-Calibrated Servo Return Spring Kit For Powerglide Units

Sonnax 28133-HD

852-28133-HD

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Sonnax Race-Calibrated Servo Return Spring Kit For Powerglide Units $11.71
Race-Calibrated Servo Return Spring Kit
  • For Powerglide Units
  • Includes Shims And Spring

  • Sonnax 28133-HD Details

    Servo Kits

    Features:
  • Designed To Work With Line Pressures From 200-275 PSI.
  • Includes Two .050" Shims To Aid In Tuning At Higher Line Pressures.
  • Ensure optimum servo function in high gear for longer band life, cooler transmission and tunability of shift.
  • Higher seat pressure to help ensure full servo release but with a lower rate for greater net apply force.

  • 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.

    Some parts are not legal for use in California or other states with similar laws / regulations