Product Description
Genuine Mopar 676003 Overdrive Planetary Pinion (NOS)
This is a genuine Mopar New Old Stock (NOS) overdrive planetary pinion gear, precision-manufactured in the USA. This critical internal transmission component is designed for the early overdrive units found in late-1930s Chrysler and DeSoto passenger cars. It serves as a vital part of the planetary gear set, allowing for reduced engine RPM at cruising speeds. Still preserved in its original vintage Mopar packaging, this pinion gear ensures the correct tooth profile and metallurgical hardness required to restore smooth, quiet operation to your classic's overdrive system.
Key Features:
- Brand: Mopar
- Part Number: 676003
- Interchange: 676003
- Position: Transmission (Overdrive Unit)
- Engine Fitment: L-Head Inline 6 & 8 Cylinder
- Origin: Made in USA
- Condition: NOS (New Old Stock)
Verified Vehicle Fitment:
| Make | Model | Year | Engine | Notes |
|---|---|---|---|---|
| Chrysler | Royal / Imperial / Airflow | 1937-1938 | All | With Overdrive Transmission |
| DeSoto | S-Series / Custom | 1937-1938 | All | With Overdrive Transmission |
Fits Years:
1937 1938
Actual Item Photos: Please look over the pictures carefully, as they depict the exact item you will receive. We utilize high-resolution photos of our current physical inventory rather than generic stock images so you can verify the specific condition, markings, and authenticity of this vintage part prior to purchase.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Unbeatable Prices & Expectations
This is a high-quality vintage component. As with many New Old Stock (NOS) parts, the item and its packaging may exhibit minor "shelf wear" consistent with several decades of storage. This can include light surface oxidation, dust, or minor box deterioration, none of which affect the structural integrity or performance of the part. These components represent the original manufacturing quality of a bygone era, often far exceeding the standards of modern aftermarket replacements.
