This rear output seal fits the NP261XHD (manual shift) and NP263XHD (electric shift) transfer cases used behind the 6.6 Liter Duramax and 8.1 Liter gas engines in 2001 - 2007 Silverado and Sierra HD trucks. It seals the rear output shaft where the rear driveshaft yoke enters the transfer case, and it has an integrated dust boot that keeps dirt and water away from the sealing lip. Replace it if fluid is leaking at the rear of the transfer case or the boot is torn, and any time the rear output or driveshaft is serviced.

Key Features

• Rear output seal for NP261XHD and NP263XHD transfer cases
• Integrated dust boot protects the sealing lip from dirt and water
• Size: 77 mm OD x 54 mm ID x 12 mm wide
• Fits 2001 - 2007 Duramax (LB7, LLY, LBZ) and 8.1 Liter gas HD trucks with XHD transfer cases

Benefits

• Stops transfer case fluid leaks at the rear output
• Prevents low fluid levels that lead to chain, bearing and pump wear
• Built-in boot extends seal life in harsh conditions

Fitment

• 2001 - 2007 Chevrolet Silverado 2500HD / 3500HD 6.6 Liter Duramax (LB7, LLY, LBZ) with NP261XHD or NP263XHD transfer case
• 2001 - 2007 GMC Sierra 2500HD / 3500HD 6.6 Liter Duramax (LB7, LLY, LBZ) with NP261XHD or NP263XHD transfer case
• 2001 - 2007 Silverado / Sierra 2500HD / 3500HD 8.1 Liter gas with NP261XHD or NP263XHD transfer case

Install it right with the Merchant Automotive Transfer Case Rear Output Seal Driver, and refill with Merchant Automotive Transfer Case Fluid. Resealing the whole case? See the 261XHD Seal Kit or 263XHD Seal Kit.

Have a gas 261HD, 263HD or NP246? Use the 261HD/263HD/NP246 Rear Output Seal.

What's Included

• (1) Transfer case rear output seal with integrated boot

Details:

• Engine Manufacturer: Duramax
• Liter: 6.6 Liter
• Engine Designation: LB7, LLY, LBZ
• Engine Years: 2001-2007
• Location: Rear
• Transfer Case Model: 261XHD, 263XHD

Applications:

• 2001-2007 Silverado/Sierra 2500HD/3500HD LB7/LLY/LBZ