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National A4138 Steering Gear Worm Shaft Race
| Brand | National A4138 |
|---|---|
| Cup Bore (Inch) | 1.3775 |
| Cup Bore (MM) | 34.9890 |
| Cup Length (Inch) | 0.3437 |
| Cup Length (MM) | 8.7300 |
| Cup Radius (Inch) | 0.0460 |
| Cup Radius (MM) | 1.1680 |
| Part Description | Taper bearing cup |
| Fits | Chrysler, DeSoto, Dodge, Fiat, and Plymouth · 90 vehicles |
Premium steel. Built with durable material for steering gear bearing service.
Crowned raceways. Promote even load distribution across the bearing surface.
Taper bearing cup. Made for steering gear worm shaft race applications.
Cross-references National A4138, 64AX167 and 96XA4138 for the same application. See all 20.
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Steering Gear Worm Shaft Race
National A4138 is a taper bearing cup for steering gear applications that require a precise race surface and consistent load support. It is built for manual steering systems and listed across a wide range of classic Chrysler, Dodge, DeSoto, Plymouth, and Fiat applications.
Key Features
- Premium-grade steel construction for durable bearing support.
- Crowned raceways promote even load distribution across the bearing surface.
- Taper bearing cup design for steering gear worm shaft service.
- Fits manual steering applications listed for multiple classic vehicle platforms.
- National A4138 part number for straightforward identification and ordering.
Detailed Description
This National taper bearing cup is engineered as a steering gear worm shaft race with a 1.3775-inch cup bore, 0.3437-inch cup length, and 0.0460-inch cup radius. The crowned raceway profile helps distribute load evenly, while the premium steel construction supports the demands of steering gear service. National A4138 is used in manual steering applications across Chrysler Imperial, Dodge Coronet, and Plymouth Suburban fitments, along with additional classic makes and models.
National A4138 cross-references 64AX167 and 96XA4138 for the same application.
What It Is Used For
- Replacing a worn or pitted steering gear bearing race.
- Restoring smooth bearing contact in manual steering gear assemblies.
- Addressing steering looseness caused by race surface wear.
- Supporting proper load transfer in taper bearing setups.
- Servicing classic steering gear components on older Chrysler, Dodge, DeSoto, Plymouth, and Fiat vehicles.
Installation Notes and Tips
Verify the cup bore, cup length, and cup radius before installation. This part is listed for manual steering applications, and fitment notes specify taper bearing set use with cup and cone. Match the application details exactly to the vehicle and steering gear configuration before assembly.
Quality Assurance
National manufactures this taper bearing cup with premium-grade steel and crowned raceways to support even load distribution in steering gear service.
This part fits 90 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Notes |
|---|---|---|---|
| 1973 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1972 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1971 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1970 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1969 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1968 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1967 | Fiat | 850 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Chrysler | Imperial | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Chrysler | Newport | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Chrysler | Windsor | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | DeSoto | Firedome | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | DeSoto | Powermaster | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Dodge | Custom | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Dodge | Royal | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1954 | Dodge | Sierra | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Chrysler | Imperial | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Chrysler | Newport | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Chrysler | Windsor | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | DeSoto | Firedome | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | DeSoto | Powermaster | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Plymouth | Belvedere | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Plymouth | Cambridge | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Plymouth | Cranbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Plymouth | Savoy | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1953 | Plymouth | Suburban | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | Imperial | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | Newport | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | Saratoga | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Chrysler | Windsor | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | DeSoto | Firedome | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | DeSoto | S-15 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Dodge | Wayfarer | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Plymouth | Cambridge | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Plymouth | Concord | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Plymouth | Cranbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1952 | Plymouth | Suburban | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | Imperial | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | Newport | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | Saratoga | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Chrysler | Windsor | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | DeSoto | S-15 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Dodge | Wayfarer | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Plymouth | Cambridge | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Plymouth | Concord | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Plymouth | Cranbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Plymouth | Deluxe | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1951 | Plymouth | Suburban | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Imperial | Standard Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Newport | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Royal | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Saratoga | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Chrysler | Windsor | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | DeSoto | S-14 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Dodge | Wayfarer | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Plymouth | Deluxe | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Plymouth | Special Deluxe | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1950 | Plymouth | Suburban | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | Imperial | Standard Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | New Yorker | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | Royal Series | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | Saratoga Series | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | Town & Country | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Chrysler | Windsor Series | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | DeSoto | S-13 | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Dodge | Coronet | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Dodge | Meadowbrook | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Dodge | Wayfarer | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Plymouth | Deluxe | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Plymouth | Special Deluxe | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| 1949 | Plymouth | Suburban | with Manual Steering; Taper Bearing Set Includes Cup and Cone |
| No rows match your filter. | |||
Directly replaces or cross-references 20 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
National — A413864AX16796XA413818226A18227A18228A313200476046R1496191J625118706774831364M11111183111504018101659600591BT4138AFA4138R5717VT3841