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Race-Calibrated Servo Return Spring Kit

Race-Calibrated Servo Return Spring Kit

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Availability: In stock

$14.95

Quick Overview

SONNAX POWERGLIDE RACE CALIBRATED SERVO SPRING 28133-HD

Details

Shims (2)
Spring
The servo return spring is the source of many mystery band failures caused by inconsistent servo release and weak springs prone to collapse. Sonnax race-calibrated servo return spring kit 28133-HD for Powerglide units ensures optimum servo function in high gear for longer band life, cooler transmission and tunability of shift. The Sonnax servo spring has higher seat pressure to help ensure full servo release but with a lower rate for greater net apply force.

Specifically designed to work with line pressures from 200 – 275 psi
Includes two .050” shims to aid in tuning at higher line pressures

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