National 99235 Engine Crankshaft Repair Sleeve - Front or Rear

Engine Crankshaft Repair Sleeve for OE-Style Sealing

National 99235 is a stainless steel engine crankshaft repair sleeve used to restore a smooth sealing surface where the crankshaft has wear or groove damage. With a 2.362 inch shaft size and a 2.785 inch flanged outside diameter, it is built for precise fitment in applications that call for a repair sleeve rather than a full shaft replacement.

This National crankshaft repair sleeve is a practical solution for Mercedes-Benz VG085 transfer case applications, along with selected Chevrolet, GMC, Ford, Nissan, Porsche, and Volkswagen vehicles. Part number 99235 is also cross-referenced as 99235RS and KWK99235 for the same application.

Key Features

• Part number: National 99235
• Product type: engine crankshaft repair sleeve
• Material: stainless steel
• Shaft size: 2.362 in. / 60.000 mm
• Shaft size range: 2.359-2.365 in. / 59.920-60.070 mm
• Overall width: 0.905 in. / 22.990 mm
• Width on shaft: 0.787 in. / 19.990 mm
• Installation depth: 1.375 in. / 34.930 mm
• Flanged outside diameter: 2.785 in. / 70.740 mm

Detailed Description

National 99235 is engineered to repair a worn crankshaft sealing surface by providing a new stainless steel running area for the seal lip. The sleeve dimensions are specified for accurate installation, including the shaft size, width on shaft, overall width, and installation depth, which helps support a proper seal interface in service. National has supplied sealing solutions for more than 75 years, and this part reflects that focus on dimensional accuracy and repair-oriented design.

Use National 99235 when the original crankshaft surface is scored, grooved, or uneven and a repair sleeve is the preferred service method. It is listed for applications such as 2006-2011 Mercedes-Benz ML350, 2007-2011 Mercedes-Benz GL450, and 2001-2006 Chevrolet Silverado 2500 HD front applications, along with additional fitments across the expanded vehicle list.

What It Helps Fix

• Oil leakage caused by a worn crankshaft sealing surface
• Seal wear from grooves or scoring on the shaft
• Repeat seal failure after prior repairs
• Loss of sealing integrity in transfer case or engine service applications
• Need for a repair solution without replacing the shaft assembly

Installation Notes and Tips

• Verify shaft diameter before installation; this sleeve is specified for a 2.359-2.365 in. shaft range.
• Clean the shaft thoroughly so the sleeve seats evenly.
• Check installation depth and width on shaft against the service requirements before pressing the sleeve into place.
• Confirm vehicle-specific fitment for the exact year, make, model, and position listed.
• For Mercedes-Benz applications, confirm the VG085 transfer case and 2-speed configuration where noted.

Quality Assurance

National designs sealing components with current vehicle service requirements in mind and backs its reputation with decades of sealing-system experience. Part number 99235 is manufactured as a stainless steel repair sleeve for consistent service use and dimensional control.