{"title":"Fluids \u0026 Additives","description":"\u003cp\u003eGenuine Dana Spicer differential fluids and friction modifier additives for Trac-Lok limited slip applications. The Dana Spicer friction modifier is required when servicing or rebuilding any Dana Trac-Lok carrier. Compatible with Dana 35, Dana 44, Dana 60, Dana 70, and Dana 80 Trac-Lok rear axle carriers. Made in the United States.\u003c\/p\u003e","products":[{"product_id":"dana-spicer-additive-friction-modifier-trac-lok","title":"Spicer 43161 Limited Slip Differential Friction Modifier Additive (Trac-Lok \/ Posi, 4 oz)","description":"\u003cp data-path-to-node=\"7\"\u003eEliminate violent differential chatter, stop cornering shudder, and restore smooth, quiet clutch engagement with this genuine \u003cb data-path-to-node=\"7\" data-index-in-node=\"126\"\u003eSpicer Limited Slip Differential Friction Modifier Additive\u003c\/b\u003e. Specifically formulated as an original equipment manufacturer (OEM) vital fluid supplement, this premium 4 oz additive (\u003cb data-path-to-node=\"7\" data-index-in-node=\"307\"\u003ePart Number: 43161\u003c\/b\u003e) is engineered by Dana to optimize the coefficient of friction within clutch-style limited-slip and positraction differentials, including the legendary Dana Trac-Lok and Power-Lok systems.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eInside a clutch-style limited-slip differential, a stack of alternating steel plates and friction discs are loaded under spring pressure to distribute torque evenly between the rear wheels. When you round a corner on dry asphalt, the outside wheel must rotate faster than the inside wheel, forcing these clutch plates to slip against one another. If you use standard gear oil without the proper chemical additives, the clutch discs can continuously stick and grab instead of sliding smoothly. This stick-slip phenomenon sends severe, low-frequency chattering vibrations throughout the rear floorboards, often sounding like a broken axle shaft or stripped ring gear. Pouring in this genuine Spicer friction modifier lowers the surface friction at critical thresholds, allowing the clutch packs to slip seamlessly when turning while maintaining firm, predictable lock-up traction when traveling in a straight line.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003eSourcing an authentic Spicer 43161 supplement ensures you are treating your differential with the exact same chemical formulation used on factory vehicle assembly lines. It is an essential additive required during routine gear oil changes or after performing a complete differential rebuild or clutch pack replacement. This highly concentrated additive comes factory-packed in a convenient 4 oz container, providing the perfect volume to treat standard light-duty truck, Jeep, SUV, or muscle car differential housings without disrupting your base gear oil viscosity or anti-wear additives.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eApplication Highlights:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-path-to-node=\"11,0,0\" data-index-in-node=\"0\"\u003eEliminates Differential Chatter:\u003c\/b\u003e Modifies surface boundary friction to completely stop the harsh sticking, popping, and grinding noises common to limited-slip differentials during tight turns and parking maneuvers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-path-to-node=\"11,1,0\" data-index-in-node=\"0\"\u003eProtects Friction Material:\u003c\/b\u003e Promotes smooth heat dissipation and reduces excessive localized thermal spikes across clutch faces, significantly extending the lifespan of your internal Trac-Lok friction discs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,2,0\"\u003e\u003cb data-path-to-node=\"11,2,0\" data-index-in-node=\"0\"\u003eGenuine Spicer OE Quality:\u003c\/b\u003e Formulated and approved by Dana Spicer—the primary engineer of the axles themselves—guaranteeing perfect chemical compatibility with factory clutch friction linings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,3,0\"\u003e\u003cb data-path-to-node=\"11,3,0\" data-index-in-node=\"0\"\u003eVersatile Fluid Compatibility:\u003c\/b\u003e Blends seamlessly into all high-quality conventional and synthetic mineral-based API GL-5 gear oils to supplement the necessary additive packages required for mechanical limited-slip units.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eVehicle, Axle \u0026amp; Maintenance Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"13\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,0,0\"\u003e\u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"\u003eDifferential Fitment:\u003c\/b\u003e Formulated explicitly for all clutch-operated Limited Slip (LSD) and Positraction configurations (such as Dana 30, Dana 35, Dana 44, Dana 60 Trac-Lok, and various muscle car Posi assemblies). \u003ci data-path-to-node=\"13,0,0\" data-index-in-node=\"214\"\u003eNot required for open differentials, automatic locking differentials like the Detroit Locker, or gear-driven limited-slips like the Truetrac.\u003c\/i\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,1,0\"\u003e\u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"0\"\u003eDosage Rate:\u003c\/b\u003e Standard passenger cars, Jeeps, and half-ton trucks typically require exactly one 4 oz container per fluid change. Larger axles (such as Dana 60, Dana 70, or Dana 80 heavy-duty truck back-ends) may require up to two containers depending on total fluid capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,2,0\"\u003e\u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"0\"\u003eUsage Guidance:\u003c\/b\u003e For best results, pour the friction modifier directly into the differential housing prior to pumping in your primary gear oil to ensure immediate, complete chemical blending during initial driving.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spicer","offers":[{"title":"Default Title","offer_id":43562416013386,"sku":"PLAT-SPICER-43161","price":22.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/5560\/6858\/files\/57.png?v=1777722017"},{"product_id":"dana-spicer-additive-friction-modifier-trac-lok-posi-limited-slip-4-fluid-oz","title":"Spicer Trac-Lok Limited Slip Axle Friction Modifier Additive (4 Fluid OZ)","description":"\u003cp data-path-to-node=\"10\"\u003eEliminate harsh rear-end chatter, stop aggressive clutch binding, and restore smooth, quiet cornering to your vehicle with this genuine \u003cb data-path-to-node=\"10\" data-index-in-node=\"136\"\u003eSpicer Limited Slip Friction Modifier Additive\u003c\/b\u003e. Specifically formulated by Dana for high-performance and utility differentials, this premium 4-ounce fluid treatment optimizes the slip coefficients within \u003cb data-path-to-node=\"10\" data-index-in-node=\"340\"\u003eTrac-Lok, Power-Lok, and standard limited-slip (posi) clutch packs\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\"\u003eIn a limited-slip differential, internal friction clutches constantly engage and disengage to distribute torque between the rear tires. Over time, standard gear oil loses its specialized friction characteristics, causing the internal clutch discs to grab and stick violently instead of sliding smoothly. This stick-slip action creates a highly noticeable chatter, shudder, or low-pitched groaning noise whenever you make sharp turns from a dead stop or maneuver into parking spaces.\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eThis original equipment manufacturer (OEM) additive serves as a highly specialized fluid enhancer. Sourcing a genuine Spicer fluid formulation guarantees exact chemical compatibility with factory clutch friction materials, preventing premature disc glaze and protecting the internal spider gears from thermal breakdown. Adding this fluid treatment lowers internal operating temperatures and dampens stick-slip harmonics without causing the differential to lose its core power-splitting traction capabilities.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eProduct Highlights:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,0,0\"\u003e\u003cb data-path-to-node=\"14,0,0\" data-index-in-node=\"0\"\u003eGenuine Spicer OEM Formulation:\u003c\/b\u003e Engineered by the original axle manufacturer to ensure exact chemical harmony with factory Trac-Lok and Power-Lok clutch friction linings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,1,0\"\u003e\u003cb data-path-to-node=\"14,1,0\" data-index-in-node=\"0\"\u003eEliminates Differential Chatter:\u003c\/b\u003e Modifies fluid friction thresholds to stop aggressive stick-slip shuddering and popping noises during tight turning maneuvers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,2,0\"\u003e\u003cb data-path-to-node=\"14,2,0\" data-index-in-node=\"0\"\u003eExtends Clutch Pack Life:\u003c\/b\u003e Prevents hot-spot glazing on the internal metal and composite discs, preserving your differential's long-term torque bias profile.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,3,0\"\u003e\u003cb data-path-to-node=\"14,3,0\" data-index-in-node=\"0\"\u003eUniversal Application:\u003c\/b\u003e Formulated to safely enhance any high-quality mineral or synthetic gear oil setup requiring a limited-slip (LS) additive.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eApplication \u0026amp; Fluid Guidelines:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"16\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,0,0\"\u003e\u003cb data-path-to-node=\"16,0,0\" data-index-in-node=\"0\"\u003eDifferential Profiles:\u003c\/b\u003e Fits all \u003cb data-path-to-node=\"16,0,0\" data-index-in-node=\"32\"\u003eDana 30, Dana 35, Dana 44, Dana 60, Dana 70, and Dana 80\u003c\/b\u003e rear or front housings equipped with clutch-driven limited-slip carriers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,1,0\"\u003e\u003cb data-path-to-node=\"16,1,0\" data-index-in-node=\"0\"\u003eUsage Instructions:\u003c\/b\u003e Shake well before using. Pour the entire 4-ounce bottle directly into the differential housing center section alongside your standard gear oil during a fluid service or to treat an active chatter condition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,2,0\"\u003e\u003ci data-path-to-node=\"16,2,0\" data-index-in-node=\"0\"\u003ePlease Note: This chemical modifier is designed strictly for clutch-style limited-slip differentials. Do not use this product in standard open differentials, completely automatic mechanical lockers (such as a Detroit Locker), or selectable air\/cable\/electric locking differentials.\u003c\/i\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spicer","offers":[{"title":"Default Title","offer_id":43562703618122,"sku":"PLAT-SPICER-43161","price":22.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/5560\/6858\/files\/57_2e4241d4-02b4-4990-945c-7c67b01ed358.png?v=1777743525"}],"url":"https:\/\/platinumperformanceparts.com\/collections\/fluids-additives.oembed","provider":"Platinum Performance Parts","version":"1.0","type":"link"}