{"product_id":"spicer-2001855-pinion-lock-nut","title":"Spicer 2001855 Heavy-Duty Differential Pinion Lock Nut (Dana 80 Axles, 1.25\"-12 Thread)","description":"\u003cp data-path-to-node=\"7\"\u003eLock down your ring and pinion gear set, establish precision bearing preload, and guarantee long-term rear differential structural integrity with this genuine \u003cb data-path-to-node=\"7\" data-index-in-node=\"159\"\u003eSpicer Heavy-Duty Differential Pinion Lock Nut\u003c\/b\u003e. Specifically engineered by Dana as a critical single-use original equipment manufacturer (OEM) replacement component, this high-tensile locking nut (\u003cb data-path-to-node=\"7\" data-index-in-node=\"356\"\u003ePart Number: 2001855\u003c\/b\u003e) is built exclusively for high-torque Dana 80 rear axle assemblies.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eWithin a vehicle's differential housing, the pinion nut holds the entire drive pinion gear and yoke sub-assembly together. It is responsible for clamping the pinion yoke down against the outer bearing race, compressing the internal crush sleeve (or shim stack) to achieve the precise rolling resistance known as pinion bearing preload. Because it directly absorbs the brutal, cyclic rotational shocks transmitted by heavy-duty commercial towing, high-payload hauling, and hard acceleration, a standard hardware nut cannot be used. Over miles of service, an old or reused nut will lose its thread tension and backing resistance. If a pinion nut backs off even a fraction of a millimeter, the pinion shaft develops dangerous forward-and-backward play, instantly throwing the ring and pinion teeth out of alignment. This movement causes aggressive gear howling, chipped gear teeth, destroyed bearings, and eventual total differential lockup.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003ePrecision-machined from premium micro-alloy structural steel, the Spicer 2001855 nut is finished with a zinc phosphate coating to combat rust and moisture scaling. It incorporates an advanced \u003cb data-path-to-node=\"9\" data-index-in-node=\"192\"\u003eself-locking thread profile\u003c\/b\u003e that mechanically distorts slightly when torqued down, binding rigidly to the pinion shaft threads without the need for unreliable liquid threadlockers. It is an industry-mandated rule among professional gear builders to always discard and replace the old pinion nut whenever swapping a pinion seal, changing a yoke, or performing a complete ring and pinion gear ratio overhaul. Sourcing this authentic OEM replacement guarantees your drivetrain is rebuilt strictly to factory blueprint limits.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eComponent 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\"\u003eMechanical Self-Locking Design:\u003c\/b\u003e Engineered with a specialized thread-binding constraint that prevents the nut from backing off or loosening under intense drivetrain resonance and temperature spikes.\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\"\u003eEstablishes Critical Preload:\u003c\/b\u003e Delivers the immense axial clamping force required to compress the pinion crush sleeve and securely dial in exact rotating torque specifications.\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 OEM Forging:\u003c\/b\u003e Fabricated to the exact material densities and structural thicknesses required to withstand the high torque loads of 1-ton and medium-duty commercial trucks.\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\"\u003eZinc Phosphate Coating:\u003c\/b\u003e Features a premium surface treatment that locks out road salt, moisture, and undercarriage grime to stop thread seizing and oxidation.\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\"\u003eAxle \u0026amp; Dimensional 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\"\u003eAxle Profile Compatibility:\u003c\/b\u003e Fits heavy-duty \u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"44\"\u003eDana 80 Rear Differential Axles\u003c\/b\u003e exclusively.\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\"\u003eThread Profile Size:\u003c\/b\u003e 1.250 inch - 12 UNF (1.25\"-12).\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\"\u003eHex Socket Head Size:\u003c\/b\u003e 1-7\/8 inch (46.46 mm).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,3,0\"\u003e\u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"0\"\u003eOverall Thickness:\u003c\/b\u003e 1.155 inches (29.23 mm).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,4,0\"\u003e\u003cb data-path-to-node=\"13,4,0\" data-index-in-node=\"0\"\u003eFlange Outer Diameter:\u003c\/b\u003e 1.843 inches (46.82 mm).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,5,0\"\u003e\u003cb data-path-to-node=\"13,5,0\" data-index-in-node=\"0\"\u003eRecommended Pairing:\u003c\/b\u003e Fits in conjunction with the genuine Spicer 37104 pinion washer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003cb data-path-to-node=\"14\" data-index-in-node=\"0\"\u003eCommon Vehicle Applications (Dana 80 Rear End Models):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"15\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,0,0\"\u003e\u003cb data-path-to-node=\"15,0,0\" data-index-in-node=\"0\"\u003eFord Trucks \u0026amp; Vans:\u003c\/b\u003e 1988–2016 Ford F-350 Dually (DRW), F-450, E-350, and E-450 Super Duty platforms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,1,0\"\u003e\u003cb data-path-to-node=\"15,1,0\" data-index-in-node=\"0\"\u003eDodge \/ RAM Trucks:\u003c\/b\u003e 1994–2002 Dodge Ram 2500 (V10 \u0026amp; Cummins Diesel Manual models) and Ram 3500 dually models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,2,0\"\u003e\u003cb data-path-to-node=\"15,2,0\" data-index-in-node=\"0\"\u003eGM \/ Chevrolet Trucks:\u003c\/b\u003e 1990–2000 Chevrolet\/GMC C3500, K3500, and 1996–2007 Express\/Savana 3500 commercial vans.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spicer","offers":[{"title":"Default Title","offer_id":43562009460810,"sku":"PLAT-SPICER-2001855","price":24.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/5560\/6858\/files\/10_3c97e186-90dc-4c09-8751-d3c4d3662346.jpg?v=1777681966","url":"https:\/\/platinumperformanceparts.com\/products\/spicer-2001855-pinion-lock-nut","provider":"Platinum Performance Parts","version":"1.0","type":"link"}