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class=\u0022product--variation-field--variation_field_product_description__38671 field field--name-field-product-description field--type-text-with-summary field--label-hidden field__item\u0022\u003E\u003Cp\u003EThis brand-new 49-spline transfer case pump comes with a Merchant Automotive machined pump plate already installed, ready to drop into an NP261HD, NP263HD, NP261XHD or NP263XHD transfer case on 2001 - 2007 Duramax Silverado and Sierra 2500HD\/3500HD trucks. The pump supplies oil to the planetary and drive sprocket, and it can be damaged by low fluid from leaking seals, a damaged drain plug or the common pump rub problem, where the pump housing\u0027s tabs wear through the rear case. Our machined pump plate helps keep the pump from wearing into the case housing, so you get a new pump and pump rub protection in one part.\u003C\/p\u003E\n\u003Cp\u003EIt\u0027s backed by our limited lifetime warranty against pump rub when installed with a new rear housing.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EKey Features\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EBrand-new 49-spline transfer case pump\u003C\/li\u003E\n\u003Cli\u003EMerchant Automotive machined pump plate installed\u003C\/li\u003E\n\u003Cli\u003EHelps protect against pump rub wear on the rear case\u003C\/li\u003E\n\u003Cli\u003EFits NP261HD, NP263HD, NP261XHD and NP263XHD transfer cases\u003C\/li\u003E\n\u003Cli\u003ELimited lifetime warranty against pump rub when installed with a new rear housing\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EBenefits\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EReplaces a heat-damaged or worn pump during a rebuild\u003C\/li\u003E\n\u003Cli\u003EPump rub protection is already installed\u003C\/li\u003E\n\u003Cli\u003EHelps prevent repeat transfer case failure from a worn pump\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EFrequently Asked Questions\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EDo I need the 49-spline or 38-spline pump?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EIt depends on your transfer case\u0027s mainshaft spline count. HD cases can have either one, so count the splines before ordering. For 38-spline cases, see our 38 Spline Pump with MA Pump Plate.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EHow do I know if my pump needs replacing?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003ECheck the pump during any rebuild. If the metal is discolored from heat, or if there are scrapes or gouges deep enough to catch a fingernail, replace the pump rather than reuse it.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EDoes this include the gasket and sealant?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003ENo. This is the pump with our plate installed. For the adapter gasket, RTV and threadlocker, use our complete Transfer Case Pump Upgrade Kit, or buy the Transfer Case Adapter Gasket separately.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EAnything else to check during installation?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EMake sure the pickup tube O-ring is in place before installing the pickup tube into the pump. Without it, the pump draws in air along with fluid and can starve the case of lubrication.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EIs there a warranty against pump rub?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EYes. This pump carries our limited lifetime warranty against pump rub. If it\u0027s installed with a new rear housing and your case still wears a hole from pump rub, we will buy you a new transfer case.\u003C\/p\u003E\n\u003Cp\u003EThe warranty covers pump rub only and applies only to installations with a new rear housing.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EFitment\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E2001 - 2007 Chevrolet Silverado 2500HD \/ 3500HD 6.6 Liter Duramax (LB7, LLY, LBZ) with 49-spline NP261HD, 263HD, 261XHD or 263XHD transfer case\u003C\/li\u003E\n\u003Cli\u003E2001 - 2007 GMC Sierra 2500HD \/ 3500HD 6.6 Liter Duramax (LB7, LLY, LBZ) with 49-spline NP261HD, 263HD, 261XHD or 263XHD transfer case\u003C\/li\u003E\n\u003Cli\u003E2007 fitment is classic-body trucks only\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003EInstalling a new rear housing? It\u0027s required for the pump rub warranty. See our Magnesium Rear Case Housing, 261XHD\/263XHD or Magnesium Rear Transfer Case Half, 246\/261HD\/263HD.\u003C\/p\u003E\n\u003Cp\u003EDoing a full rebuild? See the 261XHD or 263XHD Bearing and Seal Kit, and refill with Merchant Automotive Transfer Case Fluid.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat\u0027s Included\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E(1) New 49-spline transfer case pump assembly\u003C\/li\u003E\n\u003Cli\u003E(1) Merchant Automotive machined pump plate, installed\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EDetails:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EEngine Manufacturer: Duramax\u003C\/li\u003E\n\u003Cli\u003ELiter: 6.6 Liter\u003C\/li\u003E\n\u003Cli\u003EEngine Designation: LB7, LLY, LBZ\u003C\/li\u003E\n\u003Cli\u003EEngine Years: 2001-2007\u003C\/li\u003E\n\u003Cli\u003ETransfer Case Model: 261HD, 261XHD, 263HD, 263XHD\u003C\/li\u003E\n\u003Cli\u003ESpline Count: 49 Spline\u003C\/li\u003E\n\u003Cli\u003EWarranty: Lifetime\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EApplications:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E2001-2007 Silverado\/Sierra 2500HD\/3500HD LB7\/LLY\/LBZ\u003C\/li\u003E\n\u003C\/ul\u003E\u003C\/div\u003E\n      \u003C\/article\u003E\n","dialogOptions":{"width":"80%","dialogClass":"product-quick-view","buttons":[],"modal":true,"title":"49 Spline Pump Assembly with MA Machined Pump Plate 261HD, 261XHD, 263HD and 263XHD 2001-2007 Silverado\/Sierra 2500HD\/3500HD LB7\/LLY\/LBZ Merchant Automotive","classes":{"ui-dialog":"product-quick-view"}}}]