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National 710769 Transfer Case Output Shaft Seal - Rear
| Brand | National 710769 |
|---|---|
| Position | Rear |
| Helix Type | Counter-Clockwise-Spiral Lip Design |
| Housing Bore (Inch) | 1.929 |
| Housing Bore (MM) | 49.000 |
| Inside Diameter | 1.260 |
| Inside Diameter | 32.000 |
| Material | PTFE |
| Outside Diameter | 1.937 |
| Outside Diameter | 49.200 |
| Outside Diameter (Inch) | 1.937 |
| Outside Diameter (mm) | 49.200 |
| Part Description | Oil Seal |
| Sealing Material | PTFE |
| Series | 710700 |
| Shaft (Inch) | 1.496 |
| Shaft (MM) | 38.000 |
| Thickness | 0.709 |
| Thickness | 18.000 |
| Type | 86 |
| Unit of Dimension | Metric |
| Width (Inch) | 0.709 |
| Width (mm) | 18.000 |
| Fits | Chevrolet, GMC, and Isuzu · 21 vehicles |
PTFE sealing material. Helps maintain a tight seal with low-friction performance.
Spiral lip design. Engineered for effective sealing in demanding applications.
Oil seal. A transfer case seal built for dependable fluid retention.
Cross-references National 710769, 8-97238-997-0 and 89048427 for the same application. See all 4.
Transfer Case Output Shaft Seal for GM and Isuzu
National 710769 is a metric transfer case output shaft seal built for rear applications with the Isuzu T150 transfer case and part-time 4WD, 2-speed setups. It is specified for Chevrolet Colorado, GMC Canyon, and select Isuzu i-Series models, with PTFE sealing material and a counter-clockwise spiral lip design for controlled sealing at the output shaft.
Key Features
- PTFE sealing material for transfer case output shaft sealing
- Counter-clockwise spiral lip design
- Metric dimensions for precise housing and shaft fit
- Outside diameter: 1.937 in. / 49.200 mm
- Inside diameter: 1.260 in. / 32.000 mm
- Width: 0.709 in. / 18.000 mm
- Housing bore: 1.929 in. / 49.000 mm
- Shaft size: 1.496 in. / 38.000 mm
Detailed Description
National 710769 is an oil seal for the transfer case output shaft, engineered in a metric Type 86 format with PTFE sealing material. The seal measures 1.260 inches inside diameter, 1.937 inches outside diameter, and 0.709 inches in width, making it a direct-spec replacement for applications that require accurate shaft and bore dimensions. This part number is used in rear transfer case positions on 2004-2012 Chevrolet Colorado and 2004-2012 GMC Canyon models with the Isuzu T150 transfer case, part-time 4WD, 2-speed configuration, as well as 2006 Isuzu i-350 and 2007-2008 Isuzu i-370 applications. National 710769 also cross-references 89048427 for the same application.
What It Helps Address
- Transfer case fluid seepage at the output shaft
- Oil leakage around the rear seal area
- Contamination entering the transfer case through a worn seal
- Seal wear from shaft rotation and heat exposure
- Fitment issues caused by incorrect seal dimensions
Installation Notes and Tips
Verify the transfer case type, rear position, and shaft dimensions before installation. Clean the housing bore and shaft surface thoroughly, and inspect for grooves, corrosion, or damage that could affect sealing performance. Confirm the seal orientation matches the counter-clockwise spiral lip design and seat the seal evenly to avoid distortion. Fits 2004-2012 Chevrolet Colorado, rear; fits 2004-2012 GMC Canyon, rear; fits 2006 Isuzu i-350, rear; fits 2007-2008 Isuzu i-370, rear.
Quality Assurance
National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle applications. Part number 710769 is built to meet the dimensional and material requirements listed for the specified transfer case applications.
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 2012 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2012 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2011 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2011 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2010 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2010 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2009 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2009 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2008 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2008 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2008 | Isuzu | i-370 | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2007 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2007 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2007 | Isuzu | i-370 | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2006 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2006 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2006 | Isuzu | i-350 | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2005 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2005 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2004 | Chevrolet | Colorado | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
| 2004 | GMC | Canyon | 4WD | Rear | with Isuzu T150 Transfer Case; with Part Time 4WD; 2 Speed |
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