{"product_id":"sonnax-race-calibrated-servo-return-spring-kit-suit-gm-powerglide","title":"Sonnax Race-Calibrated Servo Return Spring Kit - SX28133-HD","description":"\u003cp\u003ePG SERVO RETURN SPRING KIT\u003c\/p\u003e\u003cp\u003eSuit GM Powerglide\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePart Number\u003c\/b\u003e: SX28133-HD\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cdiv class=\"value description\" itemprop=\"description\"\u003e \u003cp\u003eMystery 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.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpecifically designed to work with line pressures from 200-275 psi\u003c\/li\u003e\n\u003cli\u003eIncludes two .050\" shims to aid in tuning at higher line pressures\u003c\/li\u003e\n\u003cli\u003eWorks with both OE and aftermarket servo pistons\u003c\/li\u003e\n\u003cli\u003eAlso available in Sonnax supported servo master kit 28821-20K\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eContents\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShims (2)\u003c\/li\u003e\n\u003cli\u003eSpring\u003c\/li\u003e\n\u003c\/ul\u003e \u003c\/div\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":49006399324387,"sku":"SX28133-HD","price":34.4,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/0821\/9875\/files\/bcrnhrk8nuqqalyrj8hz.jpg?v=1779628679","url":"https:\/\/fastlanespares.co.nz\/products\/sonnax-race-calibrated-servo-return-spring-kit-suit-gm-powerglide","provider":"Fast Lane Spares","version":"1.0","type":"link"}