{"product_id":"stellar-automotive-group-4l40e-5l40e-2nd-clutch-molded-piston-fits-bmw-2wd","title":"Stellar Automotive Group 4L40E\/5L40E 2nd Clutch Molded Piston fits BMW 2WD","description":"\u003cp dir=\"auto\"\u003e\u003cstrong\u003eStellar Automotive Group 4L40E\/5L40E 2nd Clutch Molded Piston (2WD BMW) – Compatible for BMW 2000-2010\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eStop slipping in 2nd gear, delayed upshifts, and burnt 2nd clutches with this upgraded molded 2nd clutch piston from Stellar Automotive Group (2WD-specific).\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis direct-replacement piston is the critical apply component for the 2nd clutch pack in RWD\/2WD versions of 4L40E and 5L40E transmissions found in BMW models. The factory piston commonly cracks or loses its bond under heat and mileage, causing internal leakage that weakens 2nd gear apply — leading to flare on 1-2 or 2-3 upshifts, slipping under load, and rapid clutch failure. This molded piston with permanently bonded rubber seal restores full line pressure, delivers crisp 1st-to-3rd transitions, and protects your 2nd clutch pack for reliable BMW performance.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePerfect fit for popular 2WD BMW models including:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eBMW 3 Series (E46\/E90)\u003c\/li\u003e\n \t\u003cli\u003eBMW 5 Series (E39\/E60)\u003c\/li\u003e\n \t\u003cli\u003eBMW Z4 (E85)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSymptoms of a failing 2nd clutch piston:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul dir=\"auto\"\u003e\n \t\u003cli\u003eFlare or slip on 1-2 or 2-3 upshift\u003c\/li\u003e\n \t\u003cli\u003eDelayed engagement in 2nd gear\u003c\/li\u003e\n \t\u003cli\u003eHarsh shifts when clutches finally grab\u003c\/li\u003e\n \t\u003cli\u003eBurnt 2nd 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 2nd clutch piston and shift strong through 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 2WD BMW rebuild part to your cart today and enjoy crisp, reliable shifts!\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425244508341,"sku":"55769 PAFT","price":28.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/55769-PAFT-scaled.jpg?v=1786618949","url":"https:\/\/transpartsdirect.com\/products\/stellar-automotive-group-4l40e-5l40e-2nd-clutch-molded-piston-fits-bmw-2wd","provider":"Trans Parts Direct","version":"1.0","type":"link"}