Genuine Timken 3994 Tapered Roller Bearing Cone (NOS)
Restore the stability of your classic Ford Truck with this genuine Timken 3994 Tapered Roller Bearing Cone. This is a vintage New Old Stock (NOS) part, manufactured in the USA. It features high-quality vintage materials that provide superior durability and correctness compared to modern stiff overseas reproductions.
This part is designed for the Rear Wheel Bearing (Inner) position on specific 1975-1994 Ford Heavy Duty trucks, including F-250, F-350, and F-500 models (Sterling 10.25" and Rockwell Axles).
We make every effort to match the part number to the correct bearing. Because we source from several manufacturers, the bearing box you receive may not match the brand pictured in the listing. Rest assured, the bearing itself will match the advertised part number.
Key Features:
- Part Number: 3994 (Timken)
- Interchange Part: 3920 (Compatible Cup)
- Position: Rear Wheel Bearing (Inner)
- Dimensions: 2.6250" ID x 1.1830" Width
- Engine Fitment: All Engines
- Origin: Made in USA (Vintage Stock)
- Condition: NOS (New Old Stock)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Engine |
Notes |
| Ford |
F-250 / F-350 |
1985-1994 |
All |
10.25" Ring Gear (Rear Inner) |
| Ford |
E-250 Econoline / Club Wagon |
1985-1998 |
All |
Full Float Axle (Rear Inner) |
| Ford |
F-500 |
1975-1977 |
All |
Rockwell Axle (Rear) |
Fits Years:
1975 1976 1977 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994
Product Note: Vintage Stock Photos
This listing uses stock images for reference. Because these are NOS (New Old Stock) parts manufactured decades ago, the item you receive may have cosmetic differences from the photo, such as:
- Packaging: Box styles, colors, or condition may vary (or item may be bulk packed).
- Finish: Materials, colors, or plating may vary between production runs.
- Shelf Wear: Minor cosmetic signs of age are normal for vintage parts.
Rest assured, the Part Number (3994) and Fitment specifications are verified to be 100% correct for the vehicles listed.
Unbeatable Prices & Expectations
We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our prices are often significantly lower than major competitors.
Please Note: While we verify fitment to the best of our ability using vintage catalogs, there can be variations. We strongly recommend comparing our photos and specs to your original part before purchasing.
