Description
Transfer Case Seal Kit, 263XHD, Duramax | 2001-2007
The Merchant Automotive Seal Kit for the NP263XHD transfer case includes the seals used throughout the transfer case to complete the proper reassembly after a transfer case rebuild or major overhaul. It fits the electronic shift NP263XHD in 2001-2007 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L Duramax diesel (LB7, LLY and LBZ), and the NP263XHD used with the 8.1L gas engine.
GM transfer cases used from 1998 through early 2007 have a gear pump inside the case that is driven off the mainshaft. The pump forces oil to the planetary and the drive sprocket sleeve. Because the pump is driven by the shaft, the pump housing must "float" in the rear housing. Tabs around the pump housing fit into spots in the rear housing to locate it and keep it from spinning with the mainshaft. Over time, the pump tabs can start to wear on the rear housing. GM installed a spring steel clip in the housing intended to prevent wear, but the clip can break and be rendered useless.
Product details
- The seals for a complete NP263XHD reassembly in one kit
- Includes the front input, front output and rear output seals
- Includes the transfer case to transmission adapter gasket
- Includes the speed sensor, selector shaft sensor and pickup tube O-rings
- Every part in the kit is also sold separately
- (1) A23 speed sensor O-ring (10238)
- (1) A13 rear output seal, XHD (22049)
- (1) Transfer case to transmission adapter gasket (331304A)
Fitment / application
Transfer Case Seal Kit, 263XHD, Duramax | 2001-2007
Confirm year, engine, transmission or axle configuration before ordering.
Manufacturer product reference: Specifications and fitment.
