{"product_id":"stellar-automotive-group-4l40e-5l40e-overdrive-clutch-molded-piston-fits-gm-awd","title":"Stellar Automotive Group 4L40E\/5L40E Overdrive Clutch Molded Piston fits GM AWD","description":"\u003cp dir=\"auto\"\u003e\u003cstrong\u003eStellar Automotive Group 4L40E\/5L40E Overdrive Clutch Molded Piston (AWD) – Compatible for GM \u0026amp; BMW 2000-2010\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eStop slipping in 4th-5th gears, delayed upshifts, and burnt overdrive clutches with this upgraded molded overdrive clutch piston from Stellar Automotive Group (AWD-specific design).\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis direct-replacement piston is the critical apply component for the overdrive clutch pack in AWD versions of 4L40E and 5L40E transmissions. The factory piston commonly cracks or loses its bond under heat and mileage, causing internal leakage that weakens overdrive apply — leading to flare on upshifts, slipping under load, and rapid clutch failure. This molded piston with permanently bonded rubber seal restores full line pressure, delivers crisp 4th-to-5th transitions, and protects your overdrive clutch pack for reliable AWD performance.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePerfect fit for AWD models including:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eChevrolet Trailblazer EXT (AWD)\u003c\/li\u003e\n \t\u003cli\u003eBMW X3 (E83), 3 Series (AWD variants)\u003c\/li\u003e\n \t\u003cli\u003eCadillac CTS (early AWD)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSymptoms of a failing overdrive piston:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eFlare or slip on 4-5 upshift\u003c\/li\u003e\n \t\u003cli\u003eDelayed engagement in overdrive\u003c\/li\u003e\n \t\u003cli\u003eHarsh shifts when overdrive grabs\u003c\/li\u003e\n \t\u003cli\u003eBurnt overdrive frictions on teardown\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eDon’t let a $50 piston destroy a $500 clutch pack — install the Stellar Automotive Group molded overdrive piston (AWD) and shift strong in every gear.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e All parts are distributed, not designed or manufactured, by Stellar Automotive Group.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAdd this essential 4L40E\/5L40E AWD rebuild part to your cart today and enjoy crisp, reliable shifts!\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425244344501,"sku":"55764A PAFT","price":26.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/55764A-PAFT-scaled.jpg?v=1786618925","url":"https:\/\/transpartsdirect.com\/products\/stellar-automotive-group-4l40e-5l40e-overdrive-clutch-molded-piston-fits-gm-awd","provider":"Trans Parts Direct","version":"1.0","type":"link"}