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National 4370N Transfer Case Output Shaft Seal - RearOE Quality 60-Day Returns
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Part #: 4370N

National 4370N Transfer Case Output Shaft Seal - Rear

Rear
⚙️ 88 vehicles fit this part
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🚗Fitment: Jeep and Dodge, Grand Cherokee, Dakota, Durango, Cherokee, Wrangler, Grand Wagoneer, Comanche, Wagoneer, and CJ7
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National 4370N Transfer Case Output Shaft Seal Overview

The National 4370N transfer case output shaft seal is engineered to provide reliable sealing performance for select Dodge and Jeep vehicles. Designed with precision dimensions and durable polyacrylate material, this oil seal helps maintain transfer case integrity and prevent fluid leaks.

  • Inside diameter: 1.503 inches (38.180 mm)
  • Outside diameter: 2.383 inches (60.530 mm)
  • Flanged outside diameter: 2.640 inches (67.056 mm)
  • Thickness/width: 0.420 inches (10.670 mm)
  • Sealing material: Polyacrylate with Redicoat treatment
  • Helix type: Counter-clockwise spiral lip design
  • Housing bore diameter: 2.376 inches (60.350 mm)
  • Series: 4000, Type: 88

Detailed Product Description

The National 4370N transfer case output shaft seal is specifically designed for transfer cases in Dodge and Jeep models including Cherokee, CJ7, Comanche, Dakota, Durango, Grand Cherokee, Grand Wagoneer, Wagoneer, and Wrangler. Constructed from polyacrylate material, this oil seal offers resistance to heat and wear, ensuring a long service life. The counter-clockwise spiral lip design enhances sealing efficiency by directing fluid back into the transfer case, reducing the risk of leaks. The Redicoat treatment further improves durability and corrosion resistance.

Compatible Vehicles and Applications

This output shaft seal is compatible with transfer cases found in the following vehicles:

  • Dodge Cherokee, Dakota, Durango
  • Jeep CJ7, Comanche, Grand Cherokee, Grand Wagoneer, Wagoneer, Wrangler

Common Issues Addressed by the 4370N Seal

  • Prevents transfer case fluid leaks around the output shaft
  • Reduces contamination ingress into the transfer case
  • Minimizes wear on the output shaft and housing bore
  • Maintains proper lubrication within the transfer case
  • Helps avoid costly transfer case repairs due to seal failure

Installation Notes and Tips

  • Ensure the housing bore and shaft are clean and free of debris before installation
  • Use appropriate tools to avoid damaging the seal during installation
  • Verify correct orientation of the counter-clockwise spiral lip for optimal sealing
  • Check shaft and bore dimensions to confirm compatibility with the 4370N seal
  • Apply a light coat of transfer case fluid to the seal lip before installation

Quality Assurance and Warranty

National's 4370N transfer case output shaft seal is manufactured to meet industry standards for durability and performance. The polyacrylate material and Redicoat treatment provide enhanced resistance to wear and corrosion. This product is part of National's 4000 series, known for consistent quality in sealing systems. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.

BrandNational
Part Number4370N
Flanged Outside Diameter (Inch)2.640
Flanged Outside Diameter (MM)67.056
Helix TypeCounter-Clockwise-Spiral Lip Design
Housing Bore (Inch)2.376
Housing Bore (MM)60.350
Inside Diameter1.503
Inside Diameter38.180
MaterialPolyacrylate
Outside Diameter2.383
Outside Diameter60.530
Outside Diameter (Inch)2.383
Outside Diameter (mm)60.530
Part DescriptionOil Seal
RedicoatYes
Sealing MaterialPolyacrylate
Series4000
Shaft (Inch)1.503
Shaft (MM)38.180
Thickness0.420
Thickness10.670
Type88
Unit of DimensionInch
Width (Inch)0.420
Width (mm)10.670

This part fits 88 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
2004JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2003JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2002JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2001JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
2000DodgeDakota4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
2000JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1999DodgeDakota4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
1999DodgeDurango4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
1999JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1998DodgeDakota4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
1998DodgeDurango4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
1998JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1998JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1997DodgeDakota4WDRearwith New Process 231D Transfer Case; with Part Time 4WD; 2 Speed
1997JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1997JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1996JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1996JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1996JeepGrand Cherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1996JeepGrand CherokeeAWDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1996JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1996JeepGrand CherokeeAWDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1996JeepGrand CherokeeAWDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1995JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1995JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1995JeepGrand Cherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1995JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1995JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1994JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1994JeepCherokee4WDRear1st Design; Full Time 4WD; with 0.42 (in) Width; with New Process 242J Transfer Case; 2.383 (in) Outside Diameter; 2 Speed
1994JeepGrand Cherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1994JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1994JeepGrand Cherokee4WDRear1st Design; Full Time 4WD; with 0.42 (in) Width; with New Process 242J Transfer Case; 2.383 (in) Outside Diameter; 2 Speed
1994JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1993JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1993JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1993JeepGrand Cherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1993JeepGrand Cherokee4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1993JeepGrand Wagoneer4WDRearFull Time 4WD with New Process 249J Transfer Case 2 Speed
1993JeepGrand Wagoneer4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1993JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1992JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1992JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1992JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1992JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1992JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1991JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1991JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1991JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1991JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1991JeepGrand Wagoneer4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1991JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1990JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1990JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1990JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1990JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1990JeepGrand Wagoneer4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1990JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1989JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1989JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1989JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1989JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1989JeepGrand Wagoneer4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1989JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1988JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1988JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1988JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1988JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1988JeepWrangler4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1987JeepCherokee4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1987JeepCherokee4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1987JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1987JeepComanche4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1987JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1987JeepWagoneer4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1987JeepWrangler4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1986JeepCherokee4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1986JeepCJ74WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1986JeepComanche4WDRearFull Time 4WD with New Process 242J Transfer Case and 2 Speed - Transfer Case Input Shaft Pilot Bearing
1986JeepComanche4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1986JeepComanche4WDRearFits New Process 231J Transfer Case with Part Time 4WD and 2 Speed.
1986JeepWagoneer4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1985JeepCherokee4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1985JeepCJ74WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1985JeepWagoneer4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1984JeepCherokee4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1984JeepCJ74WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed
1984JeepWagoneer4WDRearwith New Process 207 Transfer Case; with Part Time 4WD; 2 Speed

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

04638904150474370N463890448218593868183501389835047088983501389J501389J8134491TO-56

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.