1985 Buick Century Differentials
Keep Your 1985 Buick Century in Top Shape with Quality Differentials
Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1985 Buick Century looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Oil, Differential Axle Shafts, and Differential Pinion Seals. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Top-Rated Differentials from Trusted Brands
Looking for a reliable Differential? We’ve got you covered with options from brands you know and trust like Valvoline. For example, Valvoline Differentials start at just $12.49 with an average 4.8 star rating. With over 5,798 reviews and a solid 5 star average, you can shop with confidence knowing other Buick Century owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1985 Buick Century Differential at Advance Auto Parts is around $35.87, with a range that starts at $6.99 and goes up to $243.99. With 8 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Axle Shaft, Rear Axle Shaft, Left Or Right, and Rear Axle Shaft, Left Or Right start at just $106.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Differential, don’t forget to check out other key components like CV Axles and Joints and Drive Shafts and Axles. At Advance Auto Parts, we’re here to help you keep your 1985 Buick Century in peak condition, inside and out.
Find Your Specific 1985 Buick Century Differentials
Looking for the perfect Differential for your 1985 Buick Century? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your Buick Century. Whether you’re driving a 1985 model or another popular model year like
1997,
1998,
1999,
2000,
2001,
2002,
2003,
2004, and
2005, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.
Essential 1985 Buick Century Differentials
National – Tapered Roller Bearing Cone (Part No.LM501349)
from
$21.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
Product Features:
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Product Features:
- PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN – Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
Schaeffler – Bearing – CRB (Cylindrical Roller Bearing) (Part No.FC67147)
from
$30.99
We develop and produce high-quality roller bearings, spherical bearings, and plain bearings worldwide for a wide range of applications.
Product Features:
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Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
National – Multi-Purpose Bearing (Part No.KC-11445-Y)
from
$69.99
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
Product Features:
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Product Features:
- CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
- PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN: Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
National – Bearing Race (Part No.JL69310)
from
$7.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
Product Features:
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Product Features:
- PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION: Crowned raceways for even load distribution
- OE-STYLE DESIGN: Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
Schaeffler – Cup (Part No.M88010)
from
$10.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.
Product Features:
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Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)
from
$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
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Product Features:
- Includes three quarts of conventional oil
Royal Purple – High Performance 5W-30 Synthetic Motor Oil, Better Wear Protection, 1 Quart (Part No.01530)
from
$12.99
High Performance Motor Oil API LICENSED MOTOR OIL Royal Purple High Performance Motor Oil combines premium base oils with proprietary additive technologies to create a high performance synthetic engine oil that optimizes performance and protection. Royal Purple High Performance Motor Oils carry the current API and ILSAC engine oil licenses, as well as the GM dexos1 gasoline engine oil approval. ILSAC GF-6 AND GM DEXOS1 Modern gasoline direct injection (GDI) engines have achieved levels of power and fuel economy never before possible in passenger car engines. As a result, smaller engines operate at much higher loads across all engine speeds. This has caused increased wear in critical areas of the engine, and created a destructive phenomenon called low-speed pre-ignition (LSPI). The unique, state-of-the-art additive technology in Royal Purple High Performance engine oils is designed specifically to address these issues, and help engines maintain performance and reliability.
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Product Features:
- Better Wear Protection
- Increased Protection against Low Speed Pre-Ignition
- Increased Fuel Efficiency
- Better Protection for Vehicle Exhaust Emissions Equipment
- Improved Compatibility with Fuels Containing Ethanol
- Superior Corrosion Protection
- Made in USA
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)
from
$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Product Features:
- Includes four quarts of Redline Shockproof oil
Royal Purple – High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart (Part No.51530)
from
$45.99
Royal Purple Motor Oil is a specially formulated multi viscocity oil for use in gasoline and diesel engines of all types from cars and trucks to SUVs, motorcycles and boats. Royal Purple(R) Motor Oil with Synerlec(R) additive technology reduces friction, which results in a 1-3 percent increase in horsepower, lowers operating temperatures, provides superior corrosion protection, improves fuel economy, reduces emissions and extends oil life. A.P.I. Certified.
Product Features:
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Product Features:
- Better wear protection
- Increased fuel efficiency
- Better protection of the expensive catalytic emission system
- Improved compatibility with fuels containing ethanol
- Superior corrosion protection
- Meets ILSAC GF-5 and Dexos1 performance requirements
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)
from
$99.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Product Features:
- Includes three quarts of Redline Shockproof oil
Schaeffler – Shaft Seal (Part No.SS2983)
from
$9.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.
Product Features:
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Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Schaeffler – Shaft Seal (Part No.SS2588)
from
$19.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.
Product Features:
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Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Dorman – Axle Shaft (Part No.630-142)
from
$324.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
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Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Pro-King – Rear Axle Shaft Kit (Part No.AXK-233)
from
$307.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and function.
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Product Features:
- Meets or exceeds OE specifications
- Dual heat treating process
Dorman – Rear Axle Shaft, Left Or Right (Part No.630-118A)
from
$121.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
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Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – Rear Axle Shaft, Left Or Right (Part No.630-113A)
from
$106.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
See More
Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – Rear Axle Shaft, Left Or Right (Part No.630-114A)
from
$129.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
See More
Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – Axle Shaft (Part No.630-114)
from
$243.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
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Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
National – Shaft Repair Sleeve (Part No.99199)
from
$41.99
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
Product Features:
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Product Features:
- Designed to repair damaged, grooved or worn shafts
- Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
- Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
- Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
- Easy to install with removable flange and installation tool
Driveworks – Camshaft Seal (Part No.S-99139)
Popular 1985 Buick Century Differentials Categories
Most Popular Differential Oil for 1985 Buick Centuries
Enhance your 1985 Buick Century with this popular Differential Oil we have in stock, for $12.49.
Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)
from
$12.49
Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it’s designed to help prevent leaks, reduce wear & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA
Product Features:
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Product Features:
- FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
- HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
- IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
- ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations
Best-Selling 1985 Buick Century Differential Axle Shafts
Upgrade your Century with one of our 3 best-selling Differential Axle Shafts.
Dorman – Axle Shaft (Part No.630-114)
from
$243.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
See More
Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – Rear Axle Shaft, Left Or Right (Part No.630-114A)
from
$129.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
See More
Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – Rear Axle Shaft, Left Or Right (Part No.630-113A)
from
$106.99
This axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years. When a factory axle shaft fails or is damaged by rust or collision, this replacement is engineered to help restore and ensure the proper transfer of torque and rotational power from the differential or transmission to the wheel.
Product Features:
See More
Product Features:
- Direct replacement – this axle shaft is designed to match the performance of the original equipment shaft on specified vehicle makes, models and years
- Ideal solution – when a factory axle shaft fails, this replacement is engineered to help ensure proper transfer of torque and rotational power from the differential or transmission to the wheels
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Top-Quality Differential Pinion Seals for 1985 Buick Centuries
Choose a high-quality OEM or aftermarket Differential Pinion Seal for Buick Centuries and enjoy top-notch performance from $9.99.
Schaeffler – Shaft Seal (Part No.SS2983)
from
$9.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.
Product Features:
See More
Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Our Top Pick for a 1985 Buick Century Differential Pinion Pilot Bearing
Invest in a
durable Differential Pinion Pilot Bearing for your 1985 Buick, knowing you’re getting trusted brands and expert craftsmanship.
Driveworks – Camshaft Seal (Part No.S-99139)
Differential Bearings for 1985 Buick Centuries
Make a smart move for your 1985 Buick Century with products all priced from $6.99 to $10.99.
Schaeffler – Cup (Part No.M88010)
from
$10.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.
Product Features:
See More
Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Schaeffler – Cup (Part No.LM48510)
from
$6.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.
Product Features:
See More
Product Features:
- High-precision and High-quality components used in all KITs
- Coverage of classic and new high-tech solutions for the best system coverage
Top-Rated Differential Brands For Your 1985 Buick Century
When it comes to finding the perfect Differential for your 1985 Buick Century, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Differential brands including Valvoline, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $12.49. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1985 Buick Century, providing peace of mind with parts that meet or exceed OEM standards.
Popular Valvoline 1985 Buick Century Differentials
If you’re looking for a top-quality Differential for your 1985 Buick Century, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 1 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $12.49, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 1985 Buick Century come highly rated, with over 446 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$12.49
(446)
MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart
“seems to be ok”
FAQs for 1985 Buick Century Differentials
What are the best-selling Differentials for 1985 Buick Centuries?
Out of 8 Differentials that fit 1985 Buick Centuries, the following parts are the top sellers:
- Axle Shaft (20870822) – $243.99
- Rear Axle Shaft, Left Or Right (50309582) – $106.99
- Rear Axle Shaft, Left Or Right (50309708) – $129.99
What’s the price range for 1985 Buick Century Differentials?
The prices of Differentials for the 1985 Buick Century range from $6.99 up to $243.99 for the most premium parts.
What is the average price of a Differential for a 1985 Buick Century?
The average price for Differentials for the 1985 Buick Century is $35.87. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Differentials for other Buick Century model years?
What are the cheapest Differentials for my 1985 Buick Century?
The cheapest 1985 Buick Century Differentials we carry are:
- Cup (50206003) – $6.99
- Shaft Seal (50206073) – $9.99
- Cup (50206040) – $10.99
- MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (8020023) – $12.49
- Camshaft Seal (11494113) – $23.99
Does Advance Auto Parts sell Differentials for any other 1985 Buick models?
Yes. We stock Differentials for 6 other popular 1985 Buick models. Some of the most popular are 1985 Regal Differentials, 1985 LeSabre Differentials, 1985 Skylark Differentials, 1985 Riviera Differentials, and 1985 Electra Differentials.
What are the top-rated Differentials that fit the 1985 Buick Century?
The one 1985 Buick Century Differential we have in stock is the Cup. It costs $6.99.
What types of Differentials do you sell for my 1985 Buick Century?
As of 6/2/26, these are some of the most in-demand types of Differentials for a 1985 Buick Century:
Can I get help with 1985 Buick Century Differential orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Buick Differentials and more.
What is your return policy for Buick Century Differentials?
Advance Auto Parts keeps returns simple. For new Buick Century Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.