OE Quality
60-Day Returns

Moog 304 Universal Joint
Moog Universal Joint for Dodge W300 and W350 Drive Shafts
The Moog 304 universal joint is designed specifically for Dodge W300 and W350 models, providing reliable driveline performance. This greaseable U-joint features four grooved round bearings to ensure smooth operation and durability under demanding conditions.
- Compatible with Dodge W300 and W350 drive shafts
- Part number 304 for precise identification
- Four grooved round bearing caps for enhanced stability
- Greaseable design with regular lube fitting in cross for easy maintenance
- Bearing cap diameter: 1.231 inches (31.2 mm)
- Length measurements: 3.000 inches (76.2 mm) on both axes
Technical Specifications and Features
The Moog 304 universal joint features four grooved round bearings that provide consistent rotational support and reduce wear. Each bearing cap measures 1.231 inches (31.2 mm) in diameter, ensuring a precise fit within the drive shaft assembly. The U-joint is greaseable, equipped with a regular lube fitting located in the cross, allowing for straightforward lubrication and extended service life. Length measurements are 3.000 inches (76.2 mm) on both axes, measured from outside groove to outside groove and inside groove to inside groove plus the thickness of two lock rings, ensuring compatibility with the OE Detroit 5380 series.
Applications and Problem Solving
- Replaces worn or damaged universal joints on Dodge W300 and W350 drive shafts
- Addresses driveline vibrations caused by failing U-joints
- Prevents premature bearing wear with greasable design
- Restores smooth rotational movement in the driveline
- Compatible with OE Detroit 5380 series for direct replacement
Installation Notes and Tips
When installing the Moog 304 universal joint, ensure the bearing caps are properly seated and the grease fitting is accessible for routine maintenance. Use appropriate tools to avoid damaging the bearing caps or cross. Regular lubrication through the lube fitting will help maintain optimal performance and extend the life of the U-joint. Verify fitment with Dodge W300 and W350 specifications before installation.
Quality Assurance and Warranty
Moog universal joints are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. This part is designed to match the specifications of the Detroit 5380 OE series. While specific warranty details are not provided here, Moog products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.
| Brand | Moog |
| Part Number | 304 |
| Bearing Cap Axis 1 Diameter | 1.231 |
| Bearing Cap Axis 1 Diameter | 31.2 |
| Bearing Cap Axis 2 Diameter | 1.231 |
| Bearing Cap Axis 2 Diameter | 31.2 |
| Bearing Cap Type | 4 Grooved Round Bearings |
| Bearing Diameter A - Inch | 1.231 |
| Bearing Diameter A - mm | 31.2 |
| Bearing Diameter B - Inch | 1.231 |
| Bearing Diameter B - mm | 31.2 |
| Bearing Type A | Round Grooved |
| Bearing Type B | Round Grooved |
| Greaseable | YES |
| Image | UJoint_4Grooved.tif |
| Length A - Inch | 3.000 |
| Length A - mm | 76.2 |
| Length Axis 1 | 3.000 |
| Length Axis 1 | 76.2 |
| Length Axis 2 | 3.000 |
| Length Axis 2 | 76.2 |
| Length B - Inch | 3.000 |
| Length B - mm | 76.2 |
| Length Measurement A | Outside of Groove to Outside of Groove |
| Length Measurement B | Inside of Groove to Inside of Groove plus thickness of 2 Lock Rings |
| Lube Fitting Location | Regular Lube Fitting in Cross |
| Lubricateable | YES |
| OE Series | Detroit 5380 |
| U-Joint Identification | 4 Grooved Round Bearings |
This part fits 12 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1989 | Dodge | W350 | Rear Driveshaft at Transmission | with 3 (in) Outside Diameter Yoke Span; Inside Lock Rings; Premium; with 3 (in) Outside Diameter Yoke Span |
| 1989 | Dodge | W350 | Rear Driveshaft at Rear Axle | with 3 (in) Outside Diameter Yoke Span; Inside Lock Rings; Premium; with 3 (in) Outside Diameter Yoke Span |
| 1988 | Dodge | W350 | Rear Driveshaft at Transmission | with 3 (in) Outside Diameter Yoke Span; Inside Lock Rings; Premium; with 3 (in) Outside Diameter Yoke Span |
| 1988 | Dodge | W350 | Rear Driveshaft at Rear Axle | with 3 (in) Outside Diameter Yoke Span; Inside Lock Rings; Premium; with 3 (in) Outside Diameter Yoke Span |
| 1987 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1986 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1985 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1984 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1983 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1982 | Dodge | W350 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1976 | Dodge | W300 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
| 1975 | Dodge | W300 | Rear Driveshaft at Rear Axle | Universal Joint with 3" Outside Diameter Yoke Span, Premium |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.