Description
Transfer Case Pump Upgrade Kit w/ Magnetic Plugs | 2001-2007 — 10381
The Merchant Automotive Transfer Case Upgrade Kit with Magnetic Drain Plugs combines our two most popular transfer case upgrades for 2001–2007 Duramax Silverado and Sierra 2500HD/3500HD trucks. Pump rub is a well known failure on these transfer cases. The gear pump housing "floats" in the rear case half and is held in place by tabs. Over time those tabs wear through the factory spring clip and into the magnesium case, causing a leak that usually happens only while driving. These transfer cases have no low fluid warning, so the damage is often done by the time anyone notices. This kit replaces the factory pump housing with our CNC machined 6061 aluminum housing to prevent pump rub. It also swaps in stainless steel magnetic drain and fill plugs that catch metal debris and help the fluid last longer.
This kit is designed for OE magnesium case halves and may not be compatible with some aftermarket aluminum rear case halves, because their manufacturing tolerances vary. Verify fitment before installing. The drain and fill plugs use pipe threads. Apply new Teflon tape each time and tighten them only until snug. Overtightening can crack the rear case half.
Product details
- Merchant Automotive CNC machined 6061 aluminum transfer case pump housing
- 304 stainless steel magnetic drain plug and fill plug
- Includes adapter gasket, RTV silicone with applicator nozzle, and blue threadlocker
- Fits NP261HD, NP263HD, NP261XHD and NP263XHD transfer cases
- Prevents pump rub failure, or repairs it alongside a new rear case half
- Magnetic drain plug traps wear metal so it doesn't keep circulating
- Everything for both upgrades in one box, done in one service
- Blog: Transfer Case Upgrade Only vs. Upgrade Repair Kit
Fitment / application
Merchant Automotive Transfer Case Upgrade Kit with Magnetic Drain Plugs 2001 - 2007 10381
Confirm year, engine, transmission or axle configuration before ordering.
Manufacturer product reference: Specifications and fitment.
