Sonnax® - High Performance Automatic Transmission Servo Return Spring Kit

High Performance Automatic Transmission Servo Return Spring Kit by Sonnax®. Race-Calibrated. Includes: Shims (2), Spring. Mystery band failures in OE transmissions are a common result of using inconsistent aftermarket servo return springs and weak OE springs prone to collapse. This is a problem that can be traced directly to the pin bias effect. Sonnax race-calibrated servo return spring kit counteracts pin bias effect to ensure consistent servo function for longer band life and a cooler transmission. The spring's higher seat pressure helps ensure full servo release, but also features a lower spring rate to prevent excessive release force in the apply position.

Includes

• Shims (2)
• Spring

Features

• Counteracts pin bias effect up to 275 psi
• Includes two 0.050" shims to aid in tuning at higher line pressures
• Works with both OE and aftermarket servo pistons

Sonnax® has been bringing superior-quality transmission and drivetrain components to the automotive aftermarket since 1978. The company has everything you need to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts, and protect the driveline from over-torque damage. Headquartered in southern Vermont, Sonnax is one of the fastest-growing companies in the state, boasting state-of-the-art design, development, and inspection facilities. Sonnax also has technical development centers in California, Georgia, New Jersey, Missouri, and Wisconsin. The company consists of 250 employees who take great pride in the Sonnax name and strive to further the company’s reputation for excellent technical knowledge and customer dedication. As a leading supplier to the automotive aftermarket, Sonnax exports to more than 70 countries and supports emerging markets worldwide.