{"product_id":"gabriel-fleetline-85711-heavy-duty-front-rear-shock-absorber","title":"Gabriel Fleetline 85711 Heavy Duty Front\/Rear Shock Absorber","description":"\u003cp\u003eIn this review of the Gabriel Fleetline 85711 shock absorber the bottom line is clear: this is a purpose-built heavy duty replacement for Class 8 motor coaches and commercial fleet vehicles that prioritizes durability and ride control. Designed as an OEM-style replacement for front and rear applications on Motor Coach Industries E4500, G4500 and J4500 models and GMC Coaches 4100\/4900, the 85711 is aimed at fleet operators and technicians needing a robust shock with specific valving for worn suspension. The single biggest reason to consider it is its heavy duty construction and application-tuned valving that improve ride quality under load.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication fitment:\u003c\/strong\u003e Direct replacement fit for Motor Coach Industries E4500, G4500 and J4500 front axles and GMC Coaches 4100\/4900, reducing installation time and fitment troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy duty construction:\u003c\/strong\u003e 360-degree arc-welded end mounts and chromed piston rods increase resistance to bending and corrosion for commercial use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication specific valving:\u003c\/strong\u003e Tuned valving compensates for worn suspension and helps maintain consistent ride control under varying loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable seals:\u003c\/strong\u003e Self-compensating piston seal design helps maintain performance and limit contamination in heavy duty environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService lengths:\u003c\/strong\u003e Concrete dimensions including a 24.54 in extended length, 15.26 in collapsed length and 9.27 in stroke simplify replacement planning.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Gabriel Fleetline 85711 is best for fleet owners, repair shops and operators of motor coaches, RVs and heavy commercial vehicles who need a robust, OEM-replacement shock tuned for Class 8 front axle applications. It fits specific Motor Coach Industries models and GMC coach platforms, so it suits technicians who value correct fit and heavy duty materials.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include owners of light passenger cars or trucks with different mounting codes, and buyers who need a long-term warranty-backed consumer replacement; some users report early leaks or failures in isolated cases, so warranty and local support availability should factor into the purchase decision.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBuilt for heavy commercial use with arc-welded mounts and chromed rods for increased durability.\u003c\/li\u003e\n\u003cli\u003eApplication-tuned valving delivers noticeably improved ride quality on rough roads and under load.\u003c\/li\u003e\n\u003cli\u003eDirect replacement fit for several Motor Coach Industries and GMC coach models simplifies installation.\u003c\/li\u003e\n\u003cli\u003eDetailed interchange list makes cross-referencing with OE numbers straightforward.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThere are customer reports of limited durability in some units, including leakage or failure within months, so occasional quality variability is possible.\u003c\/li\u003e\n\u003cli\u003eAs a heavy duty commercial shock, it is not intended for light passenger vehicle applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eStroke\u003c\/td\u003e\n\u003ctd\u003e9.27 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtended Length\u003c\/td\u003e\n\u003ctd\u003e24.54 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollapsed Length\u003c\/td\u003e\n\u003ctd\u003e15.26 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpper Mount Code\u003c\/td\u003e\n\u003ctd\u003eS21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLower Mount Code\u003c\/td\u003e\n\u003ctd\u003eEB3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterchange Numbers\u003c\/td\u003e\n\u003ctd\u003eIncludes 12-05-1150, 12-05-1165, 12-05-6000 and multiple OE references\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Gabriel Fleetline 85711 is a strong choice for fleet managers and repair shops needing a heavy duty, application-matched shock for Motor Coach Industries and GMC coach platforms. It offers solid ride control improvements and rugged construction at a reasonable value, though buyers should be aware of occasional durability complaints and confirm local warranty support for peace of mind.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this shock fit my Motor Coach Industries E4500?\u003c\/strong\u003e\u003cbr\u003eYes, the 85711 is specified for 01-09 Motor Coach Industries E4500 front axle applications when matching the OEM numbers listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the mounting codes for installation?\u003c\/strong\u003e\u003cbr\u003eThe published upper mount code is S21 and the lower mount code is EB3; verify these against the vehicle before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these shocks suitable for non-commercial cars?\u003c\/strong\u003e\u003cbr\u003eNo, these are heavy duty commercial shocks engineered for Class 8 coaches and fleet vehicles and are not intended for typical passenger cars.\u003c\/p\u003e","brand":"Gabriel","offers":[{"title":"Default Title","offer_id":48629055881435,"sku":"B004K86GPG","price":73.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/618vib77TbL._AC_SL1500.jpg?v=1778459431","url":"https:\/\/gearmusthave.com\/products\/gabriel-fleetline-85711-heavy-duty-front-rear-shock-absorber","provider":"GearMustHave","version":"1.0","type":"link"}