Merchant Automotive 2001-2007 Chev/GMC Transfer Case Pump Upgrade Combo – 10775


Product Highlights:

With pump rub being such a prevalent problem for 2001-early 2007 GM transfer cases, preventing the problem before it occurs is always a good idea. This Merchant Automotive transfer case upgrade is your #1 choice for preventing pump rub or replacing a transfer case housing that has succumbed to pump rub. If your transfer case has not failed due to pump rub, the basic kit can be installed to prevent future failures as preventative maintenance. The MA transfer case pump upgrade can be installed during your repair to prevent future failure.


This all in one NP261XHD/NP263XH transfer case pump upgrade kit will include all of the necessary parts to upgrade and repair a transfer case that is needing a rear case replacement due to pump rub failure. This will include Duramax diesel LB7, LLY, and LBZ engine as well as 8.1L gas engines equipped with an Allison transmission. Note that transfer cases operated without lubrication may also have additional internal damage that will not be evident from external inspection and could require additional parts. When properly installed this kit is backed by a Limited Lifetime Warranty against pump rub failure from Merchant Automotive.



  • Direct Replacement
  • Stronger Than Factory
  • All In One Kit


  • OE Style Transfer Case
  • Includes Pump Upgrade
  • Seal Driver/Pump Included

What’s In The Box

  • Merchant Automotive Billet T-6061 Aluminum CNC-Machined Transfer Case Pump Housing
  • Merchant Automotive Performance Transfer Case Fluid (2 Quart bottle #10193)
  • Merchant Automotive Magnetic Drain Plug Kit (#10185)
  • Transfer Case Adapter Gasket (#331304A)
  • RTV Silicone with applicator nozzle (#SU500530-ALU)
  • Blue Threadlock
  • OEM Magnesium Rear Transfer Case Housing (#25900)
  • Rear Output Seal (#22049)
  • Pickup Tube Seal (#12478088)
  • Speed Sensor Seal (#10238)
  • Snap Ring for the Output Shaft Bearing (#10198)
  • Snap Ring Grommet (#88958815)
  • Snap Ring Pliers (#G409P)
  • Spline Pump Assembly (#25904)
  • Rear Output Seal Driver (#10695)