To make it easier to install a new input and output shaft seals in an NP136, NP146, NP246, NP261HD, NP263HD, NP261XHD or NP263XHD transfer case the team at Merchant Automotive developed this set of CNC-machined billet aluminum seal driver. The drivers features a durable anodized black finish with a laser etched logo and part number to make them easy to identify when sitting in your tool box.

KIT Includes:

• MA Front Output Seal Driver
• MA Rear Output Seal Driver HD Cases Only
• MA Rear Output Seal Driver 2001-2019
• MA Input Seal Driver
• MA Steel Driver Handle

FAQ:

What kind of hammer should I use with the seal driver?

For best results use a rubber or plastic hammer such as a dead-blow hammer. Do not use a metal hammer as the tool could be damaged.

How do I set the seal depth while using the seal driver?

The Merchant Automotive seal drivers are precision machined with positive stops to properly index and set the depth on your seals when properly used.

Can I replace the front output shaft seal with the transfer case installed in the vehicle?

Yes, after removing the front driveshaft the seal can be removed and replaced without removing the transfer case from the vehicle. Some people feel that it can be easier to remove the transfer case and replace the seals on a workbench though.

Year

Vehicle

Chassis

Transfer Case Model Number

1998-2007

Silverado/Sierra

1500, 1500HD, 2500, 2500HD, 3500

NP246, NP261HD, NP263HD, NP261XHD, NP263XHD

1999-2007

Escalade

-

NP246

2002-2007

Avalanche

1500, 2500

NP246, NP261, NP263, NP263HD

Suburban/Yukon XL

Tahoe/Yukon

Details:

• Engine Manufacturer: Duramax
• Liter: 6.6 Liter
• Engine Designation: LB7, LLY, LBZ
• Engine Years: 2001-2007
• Finish: Black Anodized

Applications:

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