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National A-14 Manual Transmission Countershaft Bearing - Center or Rear
Overview of National A-14 Manual Transmission Countershaft Bearing
The National A-14 manual transmission countershaft bearing is engineered for reliable performance in select Volvo models. Designed as a taper bearing set, this component supports smooth transmission operation and durability in Volvo 740, 745, 760, DL, and GLE vehicles.
- Part Number: A-14
- Brand: National
- Type: Manual Transmission Countershaft Bearing (Taper Bearing Set)
- Cone Bore Diameter: 1.0000 inch (25.4 mm)
- Cup Bore Diameter: 1.9800 inch (50.292 mm)
- Cone Length: 0.5800 inch (14.732 mm)
- Cup Length: 0.4200 inch (10.668 mm)
- Standout: 0.1400 inch (3.556 mm)
- Taper Bearing Cone: L44643
- Taper Bearing Cup: L44610
Technical Specifications and Design Details
The National A-14 bearing set features precise dimensions critical for proper fit and function within the manual transmission countershaft assembly. The cone bore measures exactly 1 inch (25.4 mm) with a length of 0.58 inches (14.732 mm), while the cup bore is 1.98 inches (50.292 mm) with a length of 0.42 inches (10.668 mm). Both cone and cup have a radius of 0.0460 inches (1.168 mm), ensuring smooth rotation and load distribution. The standout dimension of 0.14 inches (3.556 mm) is designed to maintain correct bearing positioning under operational stresses. This bearing set includes the taper bearing cone L44643 and cup L44610, matching OEM specifications for Volvo manual transmissions.
Compatible Volvo Models and Applications
This National A-14 manual transmission countershaft bearing is compatible with Volvo 740, 745, 760, DL, and GLE models. It is specifically designed to replace worn or damaged bearings in these vehicles’ manual transmissions, helping restore proper gear engagement and reduce transmission noise or play.
- Eliminates excessive transmission noise caused by worn bearings
- Reduces gear slippage and improves shifting precision
- Prevents premature wear of countershaft components
- Addresses vibration issues related to bearing failure
- Restores proper bearing preload and alignment
Installation Notes and Tips
When installing the National A-14 bearing set, ensure the transmission is clean and free of debris. Proper lubrication of the bearing surfaces is essential to prevent premature wear. Use appropriate tools to press the cone and cup into place without damaging the bearing surfaces. Verify the standout dimension and bearing preload according to Volvo service specifications to ensure optimal performance. It is recommended to inspect related transmission components for wear during installation.
Quality Assurance and Warranty Information
National bearings are manufactured to meet industry standards for durability and precision. The A-14 bearing set undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects. Consult product documentation or authorized sources for exact warranty terms related to this part number.
| Brand | National |
|---|---|
| Part Number | A-14 |
| Cone Bore (Inch) | 1.0000 |
| Cone Bore (MM) | 25.4000 |
| Cone Length (Inch) | 0.5800 |
| Cone Length (MM) | 14.7320 |
| Cone Radius (Inch) | 0.0460 |
| Cone Radius (MM) | 1.1680 |
| Cup Bore (Inch) | 1.9800 |
| Cup Bore (MM) | 50.2920 |
| Cup Length (Inch) | 0.4200 |
| Cup Length (MM) | 10.6680 |
| Cup Radius (Inch) | 0.0460 |
| Cup Radius (MM) | 1.1680 |
| Part Description | Taper Bearing Set |
| Standout (Inch) | 0.1400 |
| Standout (MM) | 3.5560 |
| Taper Bearing Cone | L44643 |
| Taper Bearing Cup | L44610 |
| Width (Inch) | 0.5600 |
| Width (mm) | 14.2240 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 1987 | Volvo | 760 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1986 | Volvo | 740 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1986 | Volvo | 760 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1985 | Volvo | 740 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1985 | Volvo | 745 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1985 | Volvo | 760 | Manual | Rear | Tapered wheel bearing and race set with cup and cone design for optimal fitment. |
| 1984 | Volvo | DL | Rear | with 4-Speed Borg Warner M46 Transmission; Taper Bearing Set Includes Cup and Cone | |
| 1984 | Volvo | GLE | Rear | with 4-Speed Borg Warner M46 Transmission; Taper Bearing Set Includes Cup and Cone |
* 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.