GM 591959 Rear Nos Trans Countershaft Gear Retaining Rings 4-SPD

( Brand: Gm ), ( Manufacturer Part Number: 591959 ), ( Type: 1955 1956 1957 1958 1959 1960 1961 1962-1966 ), ( Surface Finish: Chevrolet Series 3 Truck Series 10 20 30 Pickup ), ( Country/region Of Manufacture: United States )

Review GM Nos Chevy 4-spd Trans Countershaft Gear Rear Retaining Rings fits 1955–1967

The GM 591959 countershaft gear rear retaining rings are essential components for the 4-speed transmission in Chevy vehicles manufactured between 1955 and 1967. These rings serve a critical function in maintaining the integrity and smooth operation of the transmission.

Each set of countershaft gear rear retaining rings consists of two rings. The first ring, located closer to the transmission case, is designed to securely hold the countershaft gear in place. It features an inner diameter that matches the size of the gear and an outer diameter that fits snugly against the transmission case. The ring is made from a durable material that can withstand the high forces transmitted through the transmission.

The second ring, located further out, acts as a seal to prevent transmission fluid from leaking out. This ring has a slightly larger outer diameter than the first ring and features a sealing lip that creates a tight seal against the transmission case. The material used for this ring is also designed to be resistant to the effects of transmission fluid and the high temperatures generated by the transmission.

Both rings are designed to fit together and work in harmony to keep the countershaft gear securely in place while allowing the transmission to function efficiently. If these rings become damaged or worn, it can lead to transmission fluid leaks or the countershaft gear coming loose, resulting in transmission failure.

When it comes time to replace these rings, it is important to use genuine GM parts like the 591959 countershaft gear rear retaining rings. Using aftermarket or inferior quality parts can lead to premature failure and additional repair costs down the line.

Installing these rings involves removing the transmission, separating the countershaft gear from the shaft, and then carefully sliding the new rings onto the gear and onto the shaft. The process can be complex, so it is recommended that the installation be performed by a qualified transmission repair professional to ensure that the rings are installed correctly and that the transmission functions optimally after the repair.

Pros and Cons of Buying GM 591959 Countershaft Gear Rear Retaining Rings for 1955-1967 Chevy 4-Speed Transmissions

a. OEM (Original Equipment Manufacturer) Part: These countershaft gear rear retaining rings are manufactured by General Motors, ensuring a perfect fit and compatibility with your 1955-1967 Chevy 4-speed transmission.

b. Durability: These retaining rings are engineered to withstand the heavy loads and stresses associated with transmission operation, providing reliable performance and longevity.

c. Prevent Damage: By securing the countershaft gear to the transmission, these rings help prevent damage to other transmission components, potentially saving you from costly repairs or replacements.

d. Availability: GM 591959 countershaft gear rear retaining rings are readily available from various automotive parts retailers, making it easy to source and purchase them.

a. Cost: These OEM parts can be more expensive compared to aftermarket alternatives or used parts. However, the investment in a high-quality OEM part can save you money in the long run by preventing potential transmission damage and the need for costly repairs.

b. Installation Complexity: Installing these countershaft gear rear retaining rings can be a complex process, requiring specialized tools and knowledge. It may be advisable to seek professional assistance to ensure proper installation and avoid potential complications.

When considering the purchase of GM 591959 countershaft gear rear retaining rings for your 1955-1967 Chevy 4-speed transmission, it is essential to weigh the benefits against the potential drawbacks. The OEM nature of these parts guarantees a perfect fit and durability, while their availability makes them easily accessible. However, their cost and installation complexity may serve as deterrents for some buyers. Ultimately, the decision to invest in these OEM parts depends on your preference for reliability, compatibility, and the potential cost savings resulting from avoiding transmission damage.

If you prioritize the reliability and compatibility of OEM parts and are willing to invest in their cost and installation complexity, then purchasing GM 591959 countershaft gear rear retaining rings is an excellent choice for maintaining the performance and longevity of your 1955-1967 Chevy 4-speed transmission.

Details:

NOS, New, in GM Packaging, Never Installed, Three 3 4-Speed Manual Transmission Countershaft Gear Rear Retaining Rings .050. FITS 1955-1959 CHEVROLET/GMC Series 3 truck; 1960-1967 ALL with Muncie 4-Speed; 1960-1963 10, 20, 30 Pickup/Truck.

part #: 591959 prices

• $15.00-$20.00

specifications manutransmission:

• for makes: Chevy
• for years: 1955-1967
• brand: Gm
• mpn: 591959
• type: 1955 1956 1957 1958 1959 1960 1961 1962-1966
• surface finish: Chevrolet Series 3 Truck Series 10 20 30 Pickup
• country/region of manufacture: United States

seller manutransmission:

• # reviews: 4416
• city: Cantril, Iowa
• rating: 100.0%

offer manutransmission:

• sold: 0
• options: Ship-to-home
• started: August 3, 2025
• quantity: 1
• availability: In Stock

returns manutransmission:

• policy: No Returns

payments manutransmission:

• credit card: Discover
• wallet: Paypal
• other

general manutransmission:

• Car Truck Parts Accessories > Transmission Drivetrain > Manual Transmission Parts
• condition: New other see details

shipping manutransmission:

• transit: 4-9 Days
• type: Calculated
• service: USPS Ground Advantage
• cost: $7.85
• class: Standard
• carrier: USPS

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