1985 Pontiac Firebird Differentials

Name: Pinion Nut
Brand: Motive Gear
SKU: 1260823
Price: 9.29 USD
Rating: 1.0 (1 reviews)

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1985 Pontiac Firebird in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1985 Pontiac Firebird looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Differential Oil, and Rear Differential Cover Gaskets. 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 National, Dorman, and Felpro. For example, National Differentials start at just $11.99 with an average 4.3 star rating. Dorman and Felpro offer similar pricing and quality, backed by strong customer feedback. With over 1,072 reviews and a solid 4 star average, you can shop with confidence knowing other Pontiac Firebird owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1985 Pontiac Firebird Differential at Advance Auto Parts is around $307.07, with a range that starts at $2.49 and goes up to $2,219.99. With 165 options in stock from 14 trusted brands, finding the right fit is easy. Popular picks like Multi-Purpose Bearing, Taper Bearing Cone, and 3 Qt – 80W90 Conventional Gear Oil With Posi Additive start at just $15.49 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 Drive Shafts and Axles and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1985 Pontiac Firebird in peak condition, inside and out.

Looking for the perfect Differential for your 1985 Pontiac Firebird? 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 Pontiac Firebird. Whether you’re driving a 1985 model or another popular model year like 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, and 2002, 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 Pontiac Firebird Differentials

from

$9.29

Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.

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$159.99

This kit uses Koyo bearings and races along with all high quality small parts. kit includes carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve (if applicable), oil baffles and slingers (if applicable), marking compound and brush. USA Standard Gear does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your ring & pinion set.

Product Features:

Fits 1982-1999 GM 7.5″ and 7.625″
Uses Koyo bearings and races
Included are carrier bearings and races, pinion bearings and races, pinion seal, pinion nut, crush sleeve, marking compound and brush.

from

$67.99

Product Features:

Fits GM 7.5″ and 7.625″
Steel

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$10.99

Product Features:

Clutch guide
Fits GM 7.5″ and 7.625″ Dura Grip

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$865.99

This differential ring and pinion directly replaces the original equipment on specific vehicle years, makes and models.

Product Features:

Direct replacement – this ring and pinion set matches the fit and function of the original components on certain vehicle applications
Effective fix – eliminates grinding and whining from failed original bearings
Thoroughly tested – vehicle try-on testing and rigorous quality control measures ensure longevity
Trustworthy quality – backed by team of designers and engineers in the United States

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$179.99

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.

Product Features:

Meets or exceeds OE specifications
Dual heat treating process

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$16.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

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

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$7.99

Differential Cover B

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$57.99

8.5, 9.5, & 8.2 Buick, Oldsmobile, Pontiac GM REDI sleeve yoke saver.Yukon Mighty seal.

Product Features:

Pinion Redi-sleeve
Fits GM 8.5″, 9.5″ and 8.2″ Buick, Oldsmobile and Pontiac

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$444.99

The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.

Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.

Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.

Powertrax® = Extreme Traction Systems!

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$18.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

Meets or exceeds OE specifications

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$115.99

8.5″ GM PINION KIT .

Product Features:

Fits GM 8.5″ rear
Uses Koyo bearings and races
Included are pinion bearings and races, pinion seal, pinion nut, crush sleeve, marking compound and brush.

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$198.99

Yukon yoke for GM 12 bolt car & truck, 1310 u/joint size, u-bolt design. 3.219″ snap ring span, 1.062″ cap diameter. Outside snap ring. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:

Fits GM 12 bolt passenger car and truck
30 spline
1310 u-joint size
3.219″ snap ring span
1.062″ cap diameter
Outside snap ring design
U-bolt style

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$47.99

The tremendous shock loads generated at launch by most any drag racing vehicle equipped with todays sticky tire compounds or the acceleration and deceleration of oval track cars put considerable strain on the ring gear. For this reason, the fastener experts at ARP have developed the Pro Series ring gear bolts. They are forged from premium grade 8740 chrome moly steel and are heat treated to a nominal rating of 200,000 PSI tensile strength. Specially hardened, precision ground washers are included where required. Available to fit most any ring gear setup ranging from popular 9 Inch Ford GM 10 and 12 bolt rear ends to the beefy strange differentials found in top fuel and funny car applications.

Product Features:

Forged From Premium Grade 8740 Chrome Moly Steel
Heat Treated
Nominally Rated At 200,000 Psi Tensile Strength
Specially Hardened, Precision Ground Washers
3/8″-24 RH Thread Size
0.8″ Underhead Length
200,000 PSI

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$98.99

Product Features:

MINI SPOOL GM 10 BOLT 8.2″ 28 SPLINE

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$499.99

For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!

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$399.99

GM 12P DURA GRIP case, bare, 4.10 & up, 30spline & 33spline.

Product Features:

Fits GM 12 bolt passenger car with 33 spline axles
Does not include spider gears

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$10.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

Meets or exceeds OE specifications

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$148.99

Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.5″ differential with HD bearings for large journal carrier. This kit contains carrier bearings, races and shims. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

Product Features:

Fits GM 8.5″ with aftermarket positraction
Works with Heavy Duty Bearings
Includes carrier bearings and races and “super” carrier shim kit

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$165.99

10 bolt Mini Spool for 8.5″ GM with 28 spline axles. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:

Fits GM 8.5″ with 28 spline axles
Installs into a standard open carrier case
Provides 100% traction to both wheels at all times
Not recommended for street driven vehicles

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$6.79

This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$8.99

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Validated for fit, form and function
Unsurpassed quality you can trust

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$215.99

Bearing race driver. No return.

Product Features:

Bearing race driver
Fits M802011 race
All steel construction

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$153.99

Product Features:

Positraction spring kit
Fits GM 7.5″ and 7.625″ Dura Grip
Includes preload plates

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$187.99

Yukon standard open spider gear kit for late 7.625″ GM with 28 spline axles and large and small windows. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits GM 7.625″ open differential with 28 spline axles
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

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$883.99

The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to one ton applications including Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

Product Features:

Carrier bearing puller
Works with an impact gun to safely and easliy remove carrrier bearings

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$10.99

Crush Sleeve for Model 35, Chrysler 7.25″, 8.25″ Ford 8″ & GM 7.75″. Approx 0.495″ long.

Product Features:

Crush sleeve for AMC Model 35, Chrysler 7.25″ and 8.25″, Ford 8″ and GM 7.75″
0.495″ tall

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$40.99

Product Features:

Crush sleeve eliminator kit for GM 7.5″, 7.625″ and 8.2″

Popular 1985 Pontiac Firebird Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Axle Shafts

Differential Pinion Pilot Bearings

Differential Cover Bolts

Differential Carriers

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Clutch Packs

Differential Mini Spools

Differential Ring and Pinions

Differential End Yokes

Differential Pinion Supports

Differential Lock Assemblies

Differential Spools

Differential Carrier Bearings

Differential Lock Springs

Rear Housing Cover Gaskets

Differential Pinion Bearing Kits

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Carrier Bearing Shims

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Differential Pinion Gear Thrust Washers

Differential Ring and Pinion Kits

Differential Clutch Pack Clips

Most Popular Differential Bearings for 1985 Pontiac Firebirds

Enhance your 1985 Pontiac Firebird with one of the 4 Differential Bearings we have in stock, starting at just $10.99.

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$16.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

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

from

$10.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

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$15.49

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$21.29

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:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

Best-Selling 1985 Pontiac Firebird Differential Oil

Upgrade your Firebird with one of our 6 best-selling Differential Oil.

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from

$57.99

3 Qt. Penzoil 80W90 conventional gear Oil. W/ bottle of Posi additive.

Product Features:

Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive

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$44.99

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

Includes three quarts of conventional oil

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$148.99

Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive

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$99.99

Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:

Includes three quarts of Redline Shockproof oil

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$137.99

Redline Synthetic “Shock Proof” Oil. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil

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$28.99

Castrol® Transmax® ATF/CVT Universal is a premium full-synthetic transmission fluid engineered for exceptional performance in both traditional step-shifting automatic transmissions and modern continuously variable transmissions (CVTs). Featuring Castrol Smooth Drive® Technology, it ensures enhanced friction durability for seamless gear shifts and superior high-temperature protection to resist oxidation. This advanced formulation offers unmatched protection against copper corrosion, extending the life of your transmission system. Its broad compatibility covers a wide range of ATF and CVT applications, including Dexron VI, Mercon LV, Toyota WS, Honda DW-1, Nissan Matic S, and many more, making it ideal for diverse vehicle types, including hybrids. Designed to improve workshop efficiency and simplify inventory management, this fluid is a versatile solution for professional mechanics and DIY enthusiasts alike. Packaged in a convenient 1-gallon size, it delivers outstanding value and reliability for maintaining optimal transmission performance.

Product Features:

Enhanced friction durability for smooth transmission performance
Superior high temperature protection to effectively resist oxidation
Unsurpassed protection against copper corrosion
Broad scope of vehicle applications improves workshop efficiency and inventory management
ATF Applications: Dexron VI (Dexron III, Dexron), Mercon LV (Mercon SP, Mercon V, Mercon), JASO 1A (03), JASO 1A LV (13), Toyota T IV, Toyota T III, Toyota WS, Honda/Acura DW 1/Z 1, Nissan Matic D, Matic J, Matic S, Hyundai/Kia SP IV, SP III
ATF Applications: Mazda ATF M-V, M-III, FZ, Mitsubishi SP IV, SP III, IIM, II, PA, J3, VW/Audi (6, 8 & 9 speed automatics), BMW/Mini (6, 8 and 9 speed automatics), Jaguar/Land Rover (6, 8 & 9 speed automatics), Porsche (6, 8 & 9 speed automatics)
ATF Applications: Volvo (6, 8 and 9 speed automatics), Volvo Transmission Oil 97342, AT102, Mercedes-Benz (7 and 9 speed automatics)
CVT Applications: Toyota CVT Fluid TC, Toyota CVT Fluid FE , Nissan CVT Fluid NS-1, Nissan CVT Fluid NS-2, Nissan CVT Fluid NS-3, Subaru i-CVT Fluid, Subaru i-CVT FG, Subaru Lineartronic High Torque Chain CVTF, Honda HCF-2

Top-Quality Rear Differential Cover Gaskets for 1985 Pontiac Firebirds

Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for Pontiac Firebirds and enjoy top-notch performance from $11.99.

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from

$11.99

7.5 GM cover gasket.

Product Features:

Cover gasket
Fits GM 7.5″ and 7.625″

Top Picks for 1985 Pontiac Firebird Differential Covers

Invest in one of our 6 durable Differential Covers for your 1985 Pontiac, knowing you’re getting trusted brands and expert craftsmanship.

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from

$24.99

This direct replacement differential cover matches the fit and function of the original equipment diff cover for a reliable, leak-free repair. It features a durable design, made to strict specifications, to help ensure reliable service life.

Product Features:

Direct replacement – this differential cover matches the fit and function of the original equipment diff cover on select vehicles
Reliable repair – the smart solution for fixing an existing cover that’s rusted, damaged or leaking differential fluid
Durable construction – this differential cover is made according to strict engineering standards to help ensure dependability
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

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$29.99

DIFF COVER KIT

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$379.99

Product Features:

Fits GM 7.5″ and 7.625″
Aluminum girdle cover

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$67.99

Chrome cover for 7.5″ GM.

Product Features:

Fits GM 7.5″ and 7.625″
Chrome

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$67.99

Product Features:

Fits GM 7.5″ and 7.625″
Steel

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$29.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

Meets or exceeds OE specifications

Our Top-Rated Rear Housing Cover Gaskets for 1985 Pontiac Firebirds

Make a smart move for your 1985 Pontiac Firebird with our Rear Housing Cover Gasket for $8.99.

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from

$8.99

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Validated for fit, form and function
Unsurpassed quality you can trust

Top-Rated Differential Brands For Your 1985 Pontiac Firebird

When it comes to finding the perfect Differential for your 1985 Pontiac Firebird, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 14 trusted brands. We carry the most popular Differential brands including Felpro, National, and Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $6.79. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1985 Pontiac Firebird, providing peace of mind with parts that meet or exceed OEM standards.

Popular Felpro 1985 Pontiac Firebird Differentials

If you’re looking for a top-quality Differential for your 1985 Pontiac Firebird, Advance Auto Parts has exactly what you need with our selection of Felpro Differentials. We have 1 Felpro Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $8.99, you’ll find the perfect Differential for your needs and budget. Felpro Differentials for the 1985 Pontiac Firebird come highly rated, with over 45 customer reviews and an impressive average rating of 4.6 stars. Choosing a Felpro Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $8.99

(45)

Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket

“Good quality”

Top-Quality National 1985 Pontiac Firebird Differentials

For those in search of a high-quality Differential for their 1985 Pontiac Firebird, Advance Auto Parts offers a great selection of National Differentials. With 3 National Differentials in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Differentials start at just $11.99, with an average price of $60.32, giving you a range of options to suit your budget. Backed by over 29 customer ratings and an average rating of 4.3 stars, National Differentials provide both reliability and excellent performance. Choosing a National Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $151.99

(2)

Axle Differential Bearing & Seal Kit

“All you need to overhaul a diff, at a good price”

from $11.99

(2)

Bearing Race

“Reasonable price and woks well. front diff 2006 Escalade esv”

from $16.99

(25)

Multi-Purpose Bearing

“Smooth”

FAQs for 1985 Pontiac Firebird Differentials

What are the best-selling Differentials for 1985 Pontiac Firebirds?

Out of 165 Differentials that fit 1985 Pontiac Firebirds, the following parts are the top sellers:

Multi-Purpose Bearing (3275973) – $16.99
Taper Bearing Cone (5051614) – $15.49
3 Qt – 80W90 Conventional Gear Oil With Posi Additive (11645418) – $57.99

What’s the price range for 1985 Pontiac Firebird Differentials?

The prices of Differentials for the 1985 Pontiac Firebird range from $2.49 up to $2,219.99 for the most premium parts.

What is the average price of a Differential for a 1985 Pontiac Firebird?

The average price for Differentials for the 1985 Pontiac Firebird is $307.07. 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 Pontiac Firebird model years?

Yes, we carry Differentials for 34 model years of Pontiac Firebirds between 1967 and 2002. The following model years are the most popular for Differential purchases: 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, and 1994.

What are the cheapest Differentials for my 1985 Pontiac Firebird?

The cheapest 1985 Pontiac Firebird Differentials we carry are:

Differential Pinion Gear Washer (10593184) – $2.49
Crush Sleeve (10715252) – $2.79
Ring Gear Bolt (20520168) – $2.99
Differential Cross Shaft (10282201) – $2.99
Differential Crush Sleeve (10593152) – $3.99

Does Advance Auto Parts sell Differentials for any other 1985 Pontiac models?

Yes. We stock Differentials for 6 other popular 1985 Pontiac models. Some of the most popular are 1985 Grand Prix Differentials, 1985 Bonneville Differentials, 1985 Grand Am Differentials, 1985 Sunbird Differentials, and 1985 Parisienne Differentials.

What types of Differentials do you sell for my 1985 Pontiac Firebird?

As of 3/1/26, these are some of the most in-demand types of Differentials for a 1985 Pontiac Firebird:

Can I get help with 1985 Pontiac Firebird Differential orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Pontiac Differentials and more.

What is your return policy for Pontiac Firebird Differentials?

Advance Auto Parts keeps returns simple. For new Pontiac Firebird Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1985 Pontiac Firebird Differentials

Motive Gear – Pinion Nut (Part No.1260823)

USA Standard Gear – Bearing Kit For ’81-’99 GM 7.5" & 7.625" Rear (Part No.58015)

Yukon Gear – Steel Cover For GM 7.5" & 7.625" (Part No.32331)

Yukon Gear – Clutch Guide For GM 7.5" & 7.6" Dura Grip (Part No.33251)

Dorman – Differential Ring and Pinion Set (Part No.697-314)

Pro-King – Rear Axle Shaft Kit (Part No.AXK-160)

National – Multi-Purpose Bearing (Part No.A-6)

Yukon Gear – Differential Cover B (Part No.33572)

Yukon Gear – Redi Sleeve For GM 8.5", 9.5" & 8.2" Bop Yokes (Part No.30229)

Powertrax – Lock Right Locker (Part No.1931-LR)

Pro-King – Differential Cross Shaft (Part No.741A673)

USA Standard Gear – Pinion Installation Kit For GM 8.5" Rear (Part No.60012)

Yukon Gear – Yoke For GM 12 Bolt Car & Truck, 1310 U/Joint Size, U-Bolt Design (Part No.41085)

ARP Auto Racing – For Use With General Motors, 0.800" Head L, 3/8" – 24 Thread Size, Chrome Moly (Part No.230-3001)

Motive Gear – Differential Mini Spool (Part No.MS10C-28)

Powertrax – Grip LS Traction System (Part No.LS247528)

Yukon Gear – Dura Grip Case, GM 12 Bolt Car, 4 Series (Part No.20105)

Pro-King – Differential Carrier Shim Kit (Part No.741A202)

Yukon Gear – Carrier Installation Kit For GM 8.5" Differential With HD Bearings (Part No.57009)

Yukon Gear – Mini Spool For GM 8.5" With 28 Spline Axles (Part No.32232)

Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55072)

Yukon Gear – Bearing Race Driver (Part No.56020)

Yukon Gear – Posi Spring Kit For GM 7.5", With Preload Plates (Part No.33206)

Yukon Gear – Standard Open Spider Gear Kit For Late 7.625" GM With 28 Spline Axles (Part No.16049)

Yukon Gear – The Carrier Bearing Puller (Part No.56072)

Yukon Gear – Crush Sleeve (Part No.33093)

Yukon Gear – Crush Sleeve Eliminator Kit For GM 7.5" & 8.2" (Part No.55047)

National – Multi-Purpose Bearing (Part No.A-6)

Driveworks – Taper Bearing Cone (Part No.S-LM-501349)

Driveworks – Taper Bearing Cone (Part No.S-LM-102949)

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT5)

Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil With Posi Additive (Part No.15003)

Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

Castrol – Transmax ATF/CVT Universal Transmission Fluid, Smooth Performance, 1 Gallon (Part No.15E0C8)

Yukon Gear – 7.5 GM Cover Gasket (Part No.23018)

Dorman – Differential Cover (Part No.697-701)

ATP – DIFF COVER KIT (Part No.111102)

Yukon Gear – Aluminum Girdle Cover For GM 7.5" & 7.625" (Part No.32118)

Yukon Gear – Chrome Cover For 7.5" GM (Part No.32014)

Yukon Gear – Steel Cover For GM 7.5" & 7.625" (Part No.32331)

Pro-King – Differential Carrier Cover (Part No.741A758)

Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55072)