1985 Pontiac Firebird Differentials

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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 Carrier Bearing Set, and Differential Oil. 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, Motive Gear, and Driveworks. For example, National Differentials start at just $11.99 with an average 4.3 star rating. Motive Gear and Driveworks offer similar pricing and quality, backed by strong customer feedback. With over 1,776 reviews and a solid 4.3 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 $190.58, with a range that starts at $2.79 and goes up to $1,015.00. With 142 options in stock from 13 trusted brands, finding the right fit is easy. Popular picks like Dorman – Help Differential Shaft Lock Bolt, 81048, Dorman Differential Cover, 697-701, and Motive Gear Ring Gear Bolt, 14066913 start at just $2.99 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 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.

Essential 1985 Pontiac Firebird Differentials

Richmond Gear – Richmond Gear Differential Bearing Kit, 29-0013-1 (Part No.29-0013-1)

Richmond Gear Differential Bearing Kit, 29-0013-1

from

$58.99
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND.
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National – National Bearing Race, HM89410 (Part No.HM89410)

National Bearing Race, HM89410

from

$11.49
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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Yukon Gear – Yukon Gear Differential, 26014 (Part No.26014)

Yukon Gear Differential, 26014

from

$889.99
Yukon Gear Differential, 26014. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Driveworks – Driveworks Taper Bearing Set, S-A-5 (Part No.S-A-5)

Driveworks Taper Bearing Set, S-A-5

from

$11.99
Value-priced bearing meets all cataloged application requirements.
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Yukon Gear – Yukon Gear Differential Cover B, 33572 (Part No.33572)

Yukon Gear Differential Cover B, 33572

from

$7.99
Yukon Gear Differential Cover B, 33572.
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USA Standard Gear – USA Standard Gear Differential Axle Shaft, 35060 (Part No.35060)

USA Standard Gear Differential Axle Shaft, 35060

from

$264.99
“USA Standard axle shaft for 8.2″” Buick, Oldsmobile & Pontiac, bolt in axle. 29 7/8″” long, 28 spline.”
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Yukon Gear – "Yukon Gear 14 Plate Dura Grip Composite Clutch Kit for GM 7.5""/Ford 7.5""/M35 Differentials, 16119" (Part No.16119)

"Yukon Gear 14 Plate Dura Grip Composite Clutch Kit for GM 7.5""/Ford 7.5""/M35 Differentials, 16119"

from

$202.99
This Yukon Gear & Axle clutch kit is a direct replacement for the popular Yukon Dura Grip positraction unit. Kit includes 14 composite clutches.
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Yukon Gear – "Yukon Gear Posi Spring Kit for GM 7.5"", with Preload Plates, 33206" (Part No.33206)

"Yukon Gear Posi Spring Kit for GM 7.5"", with Preload Plates, 33206"

from

$153.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Motive Gear – Motive Gear Differential Ring and Pinion, GM7.5-410 (Part No.GM7.5-410)

Motive Gear Differential Ring and Pinion, GM7.5-410

from

$236.99
Motive Gear Differential Ring and Pinion, GM7.5-410.
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Powertrax – Powertrax Differential Lock Assembly, 1930-LR (Part No.1930-LR)

Powertrax Differential Lock Assembly, 1930-LR

from

$445.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax 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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Yukon Gear – "Yukon Gear 3/8"" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More, 33347" (Part No.33347)

"Yukon Gear 3/8"" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More, 33347"

from

$4.99
“3/8″” ring gear bolt washer for GM 12 bolt car & truck, 8.2 BOP & more.”
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Yukon Gear – Yukon Gear Replacement Carrier Shim Kit for Dana 60, 70, 70HD, 70U & 80, 55011 (Part No.55011)

Yukon Gear Replacement Carrier Shim Kit for Dana 60, 70, 70HD, 70U & 80, 55011

from

$13.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Motive Gear – Motive Gear Differential Master Bearing Kit – Koyo, R7.5GRLMK (Part No.R7.5GRLMK)

Motive Gear Differential Master Bearing Kit - Koyo, R7.5GRLMK

from

$119.99
Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv
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ARP Auto Racing – "ARP Auto Racing For Use With General Motors, 0.800""Head L, 3/8"" – 24 Thread Size, Chrome Moly, 230-3001" (Part No.230-3001)

"ARP Auto Racing For Use With General Motors, 0.800""Head L, 3/8"" - 24 Thread Size, Chrome Moly, 230-3001"

from

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

Dorman Differential Cover, 697-701

from

$28.99
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.
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USA Standard Gear – USA Standard Gear Differential Spider Gear Kits, 39021 (Part No.39021)

USA Standard Gear Differential Spider Gear Kits, 39021

from

$161.99
“Ford 8″” & 9″” TracLoc ring gear bolt, 1-1/4″” long.”
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Yukon Gear – Yukon Gear Pinion Nut, 33152 (Part No.33152)

Yukon Gear Pinion Nut, 33152

from

$9.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Powertrax – Powertrax Differential Lock Assembly, 9207853005 (Part No.9207853005)

Powertrax Differential Lock Assembly, 9207853005

from

$544.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax 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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Mr. Gasket – Mr. Gasket Differential Cover Gasket, 84B (Part No.84B)

Mr. Gasket Differential Cover Gasket, 84B

from

$22.19
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit. Fits 1964-1970 Chevrolet 8.2 inch 10 bolt & 1970-1981 GM 8.5 inch ring gear.
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Yukon Gear – Yukon Gear Yoke for 12P, 12T, and ’63 To ’74 GM CI ‘Vette with A 1310 U/Joint Size, 41167 (Part No.41167)

Yukon Gear Yoke for 12P, 12T, and '63 To '74 GM CI 'Vette with A 1310 U/Joint Size, 41167

from

$276.99
Yukon Gear and Axle manufactures a complete line of general replacement and performance series of pinion yokes for many street, racing, and heavy-duty off-road applications.
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Yukon Gear – "Yukon Gear Bearing Race Driver for GM 7.5"" and 7.6"" Differentials, 56016" (Part No.56016)

"Yukon Gear Bearing Race Driver for GM 7.5"" and 7.6"" Differentials, 56016"

from

$188.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Yukon Gear – Yukon Gear Dura Grip Spider Gear Set for GM 12P/12T Diffs with 33 Spline Axles, 16040 (Part No.16040)

Yukon Gear Dura Grip Spider Gear Set for GM 12P/12T Diffs with 33 Spline Axles, 16040

from

$305.99
Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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Richmond Gear – Richmond Gear Differential Pinion Shaft, CSPGM75 (Part No.CSPGM75)

Richmond Gear Differential Pinion Shaft, CSPGM75

from

$26.49
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND.
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Valvoline – Valvoline Extended Protection Full Synthetic Automatic Transmission Fluid ATF 1 QT, 904976 (Part No.904976)

Valvoline Extended Protection Full Synthetic Automatic Transmission Fluid ATF 1 QT, 904976

from

$15.99
Modern transmissions are better than ever, with more gears to help improve fuel efficiency and acceleration. Greater performance calls for greater protection. Valvoline Extended Protection Full Synthetic ATF features our exclusive Dual Defense Additive Technology for two layers of protection against metal-on-metal contact and thermal breakdown, all while minimizing wear on clutch components. In fact, Valvoline Extended Protection Full Synthetic ATF is 45% stronger against breakdown compared to major brand DEX/MERC oxidative PDSC performance. Proven to maximize transmission life, our patented formula keeps your modern vehicle shifting smoothly, mile after mile, with the ultimate protection you can only expect from Valvoline, the #1 ATF brand.
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Yukon Gear – "Yukon Gear Pinion Depth Shims for GM 8.25""IFS, 8.5"", 12 Bolt Car, Ford 8.8"", Chrysler 8.25"", 55009" (Part No.55009)

"Yukon Gear Pinion Depth Shims for GM 8.25""IFS, 8.5"", 12 Bolt Car, Ford 8.8"", Chrysler 8.25"", 55009"

from

$27.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – Yukon Gear Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045 (Part No.56045)

Yukon Gear Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045

from

$153.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Motive Gear – Motive Gear Differential Crush Sleeve, 3507575 (Part No.3507575)

Motive Gear Differential Crush Sleeve, 3507575

from

$2.99
Motive Gear Differential Crush Sleeve, 3507575.
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National – National Tapered Roller Bearing Cone, M804049 (Part No.M804049)

National Tapered Roller Bearing Cone, M804049

from

$35.49
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
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Most Popular Differential Bearing for 1985 Pontiac Firebirds

Enhance your 1985 Pontiac Firebird with this popular Differential Bearing we have in stock, for $13.49.

Driveworks – Driveworks Tapered Roller Bearing, S-LM-102911 (Part No.S-LM-102911)

Driveworks Tapered Roller Bearing, S-LM-102911

from

$13.49
Driveworks Tapered Roller Bearing, S-LM-102911.
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Best-Selling 1985 Pontiac Firebird Differential Carrier Bearing Set

Upgrade your Firebird with our best-selling Differential Carrier Bearing Set with a 4.5 Starts rating across 70 reviews.

Driveworks – Driveworks Taper Bearing Set, S-A-5 (Part No.S-A-5)

Driveworks Taper Bearing Set, S-A-5

from

$11.99
Value-priced bearing meets all cataloged application requirements.
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Top-Quality Differential Oil for 1985 Pontiac Firebirds

Choose a high-quality OEM or aftermarket Differential Oil for Pontiac Firebirds and enjoy top-notch performance from $44.99.

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

Yukon Gear 3 Qt - Penzoil 80W90 Conventional Gear Oil, 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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Yukon Gear – "Yukon Gear Redline Synthetic ""Shock Proof"" Oil – 4 Quarts, 15004" (Part No.15004)

"Yukon Gear Redline Synthetic ""Shock Proof"" Oil - 4 Quarts, 15004"

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Top Picks for 1985 Pontiac Firebird Rear Differential Cover Gaskets

Invest in one of our 2 durable Rear Differential Cover Gaskets for your 1985 Pontiac, knowing you’re getting trusted brands and expert craftsmanship.

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

Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 55072

from

$9.49
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.
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Yukon Gear – Yukon Gear 7.5 GM Cover Gasket, 23018 (Part No.23018)

Yukon Gear 7.5 GM Cover Gasket, 23018

from

$11.99
7.5 GM cover gasket. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Top-Rated Differential Covers for 1985 Pontiac Firebirds

Make a smart move for your 1985 Pontiac Firebird with products all priced from $28.99 to $67.99.

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

Dorman Differential Cover, 697-701

from

$28.99
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.
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ATP – ATP Differential Cover Kit With Internal Magnet, 111102 (Part No.111102)

ATP Differential Cover Kit With Internal Magnet, 111102

from

$29.99
Differential covers can become damaged from road debris, corrosion, or bolt/drain plug over tightening. Their job is to act as a lid keeping lubricants in place for the ring and pinion gears, bearings, and bushings. Without lubricants, the differential quickly become damaged. ATP Differential Cover Kits include a replacement gasket and are designed to fit and function just like the original part ensuring long life and durability.
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Yukon Gear – "Yukon Gear Steel Cover for GM 7.5"" & 7.625"", 32331" (Part No.32331)

"Yukon Gear Steel Cover for GM 7.5"" & 7.625"", 32331"

from

$67.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Chrome Cover for 7.5"" GM, 32014" (Part No.32014)

"Yukon Gear Chrome Cover for 7.5"" GM, 32014"

from

$67.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.
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Pro-King – Pro-King Differential Carrier Cover, 741A758 (Part No.741A758)

Pro-King Differential Carrier Cover, 741A758

from

$29.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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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 13 trusted brands. We carry the most popular Differential brands including National, Driveworks, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $11.99. 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 National 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 National Differentials. We have 3 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.99 and an average cost of $64.66, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1985 Pontiac Firebird come highly rated, with over 5 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
National Multi-Purpose Seal, 7457N
from $27.99
(1)
National Multi-Purpose Seal, 7457N
“Pinion Seal simple replacement after removing driveshaft and pinion input.”
National Axle Differential Bearing & Seal Kit, RA-320
from $153.99
(2)
National Axle Differential Bearing & Seal Kit, RA-320
“All you need to overhaul a diff, at a good price”
National Bearing Race, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”

Top-Quality Driveworks 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 Driveworks Differentials. With 2 Driveworks 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, giving you a range of options to suit your budget. Backed by over 108 customer ratings and an average rating of 4.2 stars, Driveworks Differentials provide both reliability and excellent performance. Choosing a Driveworks Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Driveworks Taper Bearing Set, S-A-6
from $11.99
(38)
Driveworks Taper Bearing Set, S-A-6
“HELPFUL ASSOCIATE”
Driveworks Taper Bearing Set, S-A-5
from $11.99
(70)
Driveworks Taper Bearing Set, S-A-5
“Great”

FAQs for 1985 Pontiac Firebird Differentials

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

Out of 142 Differentials that fit 1985 Pontiac Firebirds, the following parts are the top sellers:

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

The prices of Differentials for the 1985 Pontiac Firebird range from $2.79 up to $1,015.00 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 $190.58. 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:

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 8/2/26, 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.