Product Description
Genuine General Motors 8611958 Reverse Piston Release Springs (NOS)
This genuine General Motors (GM) 8611958 Reverse Piston Release Springs set, manufactured by Detroit Transmission, is a New Old Stock (NOS) component designed for 1951-1962 Hydra-Matic automatic transmissions. These critical springs ensure proper function of the reverse unit piston, essential for smooth and reliable reverse gear engagement in classic GM vehicles such as Cadillac Series 60, 62, 75, Eldorado, and DeVille; Oldsmobile 88, 98, and Starfire; Pontiac Chieftain, Star Chief, Bonneville, and Catalina; and various Chevrolet and GMC models equipped with Hydra-Matic transmissions.
Key Features:
- Brand: General Motors (Detroit Transmission / Hydra-Matic)
- Part Number: 8611958
- OEM Number: 8611958
- Position: Reverse Unit Piston (Hydra-Matic Transmission)
- Origin: Made in U.S.A.
- Condition: NOS (New Old Stock)
Fitment:
| Make | Model | Year | Engine | Notes |
| Cadillac | Series 60 / Series 62 / Series 75 / Eldorado / DeVille | 1951-1962 | All | With Hydra-Matic Transmission |
| Oldsmobile | 88 / 98 / Starfire | 1951-1962 | All | With Hydra-Matic Transmission |
| Pontiac | Chieftain / Star Chief / Bonneville / Catalina | 1951-1962 | All | With Hydra-Matic Transmission |
| Chevrolet | 150 / 210 / Bel Air / Impala | 1951-1962 | All | With Hydra-Matic Transmission |
| GMC | 100 / 150 / 250 Series | 1951-1962 | All | With Hydra-Matic Transmission |
Fits Years:
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
A Note on Fitment Accuracy: We manually research our fitment data using vintage manufacturer catalogs to provide you with the most accurate information possible. However, because we are human and these decades-old resources can occasionally contain errors, we cannot guarantee 100% accuracy. We strongly encourage you to perform your own due diligence and verify this part number for your specific application before purchasing. Please note that this part may also fit other vehicles or years not explicitly listed in our research.
Unbeatable Prices & Expectations
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
