ORIGINAL GM 4.11PONTIAC8.875ST31S Posi Safety Track 65-70 Catalinabonneville

( Brand: Original Gm ), ( Manufacturer Part Number: 4.11PONTIAC8.875ST31S ), ( Part Type: Safety ), ( Service Years: 1965 1970 Only ), ( Ring Gear Bolt Size: 7/16 ), ( Ring Gear Diameter: 8.875 ), ( Ratio: 4.11 ), ( Drive Type: Rwd ), ( Vintage Part: Yes ), ( Modified Item: No ), ( Placement On Vehicle: Rear ), ( Cover Bolt Count: 10 ), ( Surface Finish: Reconditioned ), ( Ring Gear Bolt Count: 12 )

Review ORIGINAL GM 4.11 Pontiac 8.875 Posi Safety Track Catalinabonneville fits PRIX GRAND 1965–1967

Introducing the 4.11 Pontiac Posi Safety Track differential for 1965-1970 Bonneville and 1967 Prix models, an essential upgrade for your classic Pontiac vehicle. This superior differential, identified by the part numbers 8.875 and GM 4.11, is a must-have for enthusiasts seeking improved performance and reliability on the track or the street.

The 4.11 Pontiac Posi Safety Track differential is an Posi-Traction unit, meaning it uses a clutch pack to transmit power to both wheels, ensuring optimal traction and stability. This particular model boasts a 4.11 gear ratio, which is ideal for delivering a healthy balance of acceleration and cruising speed.

Manufactured to the highest standards, this differential features a heavy-duty housing that provides enhanced durability and resistance to wear and tear. Its precision-engineered gears are designed to minimize friction and heat build-up, ensuring a smooth and efficient driving experience.

To ensure the safety and reliability of your vehicle, this differential comes with a limited-slip feature. This means that, under normal driving conditions, power is distributed evenly between the wheels for optimal traction and stability. However, when one wheel loses traction, the clutch pack engages, allowing power to be sent to the wheel with better grip, preventing wheel slippage and improving overall control.

For those who enjoy the thrill of the track, the 4.11 Pontiac Posi Safety Track differential is a valuable upgrade. Its robust design and reliable performance make it the perfect choice for enthusiasts seeking to enhance their driving experience. Whether you're cruising down the open road or pushing your vehicle to the limit on the track, this differential is the ideal companion for your 1965-1970 Bonneville or 1967 Prix.

In conclusion, the 4.11 Pontiac Posi Safety Track differential is a high-performance, heavy-duty unit designed to deliver superior traction, reliability, and durability for your classic Pontiac vehicle. Its 4.11 gear ratio, Posi-Traction design, limited-slip feature, and heavy-duty housing make it an essential upgrade for any enthusiast seeking to elevate their driving experience.

The GM 4.11 Posi Safety Track differential is a popular choice for those restoring or modifying older vehicles, such as a 1965 Pontiac Catalina or a 1967 Bonneville or Prix with a 8.875-inch rear end. This differential offers several advantages and disadvantages.

1. Enhanced Traction: The Posi Safety Track differential provides improved traction and stability, especially during hard cornering or high-speed driving. The differential's clutch pack allows the wheels to turn at different speeds when cornering, reducing tire slippage and improving overall grip.

2. Durability: The GM 4.11 Posi Safety Track differential is known for its durability and reliability. Its heavy-duty design and robust construction make it an excellent choice for high-performance applications or heavy-duty use.

3. Versatility: The differential is available in various ratios, including the popular 4.11:1 ratio, allowing vehicle owners to choose the best gear ratio for their driving style and application.

1. Cost: The GM 4.11 Posi Safety Track differential can be more expensive than other aftermarket differentials. However, its superior performance and durability may justify the additional cost for some.

2. Complexity: Installing a Posi Safety Track differential can be more complex than installing a standard differential. It requires specialized tools and expertise, which can add to the overall cost and time of the installation process.

3. Noise: Some drivers report that the differential can be noisier than a standard differential. The increased noise level is a result of the clutch pack's operation and is typically more noticeable during hard acceleration or cornering.

The GM 4.11 Posi Safety Track differential offers several advantages, including enhanced traction, durability, and versatility. However, it also comes with some disadvantages, such as a higher cost, increased complexity during installation, and increased noise level.

If you are looking for superior traction and stability for your 1965 Pontiac Catalina, 1967 Bonneville, or 1967 Prix with a 8.875-inch rear end, the GM 4.11 Posi Safety Track differential is an excellent choice. Its robust construction and heavy-duty design make it an ideal option for high-performance applications or heavy-duty use. However, be prepared for the additional cost, complexity during installation, and increased noise level that come with this differential.

If you are considering purchasing a GM 4.11 Posi Safety Track differential for your 1965 Pontiac Catalina, 1967 Bonneville, or 1967 Prix, we recommend that you carefully weigh the advantages and disadvantages and ensure that the benefits outweigh the costs for your specific application. It's also important to work with a knowledgeable and experienced mechanic to ensure a smooth installation process.

Details:

SAFETY TRACK PONTIAC PERFORMANCE 4 SERIES UNIT VERY HARD TO FIND. 10 BOLT 8.875 PONTIAC. Rich field, Oh. NON 455 CARS.

4.11 RING AND PINION EVEN HARDER TO FIND.

part #: 411pontiac8875st31s prices

• $10.00-$35.82

specifications othellodrivetrain:

• for models: Prix, Grand
• for makes: Pontiac
• for years: 1965-1967
• brand: Original Gm
• mpn: 4.11pontiac8.875st31s
• part type: Safety
• service years: 1965 1970 Only
• ring gear bolt size: 7/16
• ring gear diameter: 8.875
• ratio: 4.11
• drive type: Rwd
• vintage part: Yes
• modified item: No
• placement on vehicle: Rear
• cover bolt count: 10
• surface finish: Reconditioned
• ring gear bolt count: 12

shipping othellodrivetrain:

• class: Standard
• cost: $105.27
• transit: 3-6 Days
• service: FedEx Ground / FedEx Home Delivery
• type: Calculated
• carrier: FedEx

seller othellodrivetrain:

• rating: 100.0%
• city: Richfield, Ohio
• # reviews: 4581

offer othellodrivetrain:

• sold: 0
• started: August 17, 2025
• availability: In Stock
• options: Ship-to-home
• quantity: 1

payments othellodrivetrain:

• wallet: Apple-pay
• other
• credit card: Diners-club

returns othellodrivetrain:

• policy: No Returns

general othellodrivetrain:

• Car Truck Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain
• condition: Remanufactured

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