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SONNAX 28133HD
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$14.92
Price
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$0.00
Core
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+ Sold in packs of 1x1
Pack
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$14.92
Total
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| Race-Calibrated Servo Return Spring Kit |
Mystery band failures in GM Powerglides 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 28133-HD 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.
Features:
- Counteracts pin bias effect up to 275 psi
- Includes two .050” shims to aid in tuning at higher line pressures
- Works with both OE and aftermarket servo pistons
 Additional Resources
Installation Instructions
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SONNAX Warranty Information:6 months |
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