1981 Pontiac Firebird Differentials
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Richmond®Excel™ Rear Ring and Pinion Gear SetPontiac Firebird with 10 Bolt 1981, Excel™ Rear Ring and Pinion Gear Set by Richmond®. Designed utilizing the latest technology, this product by Richmond features premium quality and will perform better than advertised. Perfect for...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$218.99 - $269.99 - Motive Gear®Ring and Pinion Gear SetPontiac Firebird 1981, Ring and Pinion Gear Set by Motive Gear®. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer ring and pinions for easy setup, superior strength,...Quiet operationComputer controlled heat treatment$195.87 - $434.99
- Auburn Gear®Grip-N-Loc™ Rear DifferentialPontiac Firebird 1981, Grip-N-Loc™ Rear Differential by Auburn Gear®. Auburn Gear’s most advanced limited slip differential, the Grip-N-Loc™, builds upon exclusive technologies found in the previous limited slip line, but is...Upgrades vehicles for safe transfer of increased power/torque across the axleCase material is up to 50% stronger than OE cases$611.95 - $655.37
- Dorman®OE Solutions™ Rear Differential Ring and PinionPontiac Firebird 1981, OE Solutions™ Rear Differential Ring and Pinion by Dorman®. The gears of Dorman’s Differential Ring and Pinion are engineered to effectively transfer torque from the driveshaft to the axles. It's robust steel...Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit$95.09 - $591.45
- Yukon Gear & Axle®Dura Grip™ DifferentialPontiac Firebird 1981, Dura Grip™ Differential by Yukon Gear & Axle®. The Yukon Dura Grip an example of the popular clutch plate limited slips that appeared as OE equipment. Steel clutch plates, half of which are covered with a...Provides aggressive yet smooth traction to give you the confidence and performance you needFully rebuildable 4 spring design with composite clutches$682.89 - $936.89
- Yukon Gear & Axle®High Performance Ring and Pinion Gear SetPontiac Firebird 1981, High Performance Ring and Pinion Gear Set by Yukon Gear & Axle®. Yukon Ring and Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions. Whether it’s on the...Smooth finishEasy Set-Up$359.89 - $599.89
- Richmond®Mini SpoolPontiac Firebird 3.8L / 4.3L / 4.9L / 5.0L with 28 Spline, Open Differential, 10 Bolt, GM 8.5" Series Axle 1981, Mini Spool by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking...Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability$106.41
- Spicer®Rear Mini SpoolPontiac Firebird Trans Am with GM 8.5" Series Axle 1981, Rear Mini Spool by Spicer®. Designed to replace the spider gears inside the differential case, Spicer mini spools are a fast, effective way to get full lock-up on the dirt track...Expertly crafted from premium materialsDesigned to match rigorous quality standards$126.61 - $155.68
- Yukon Gear & Axle®Grizzly Locker™ Front and Rear DifferentialPontiac Firebird with GM 8.5" Series Axle 1981, Grizzly Locker™ Front and Rear Differential by Yukon Gear & Axle®. The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing....Available for many popular off-road & performance applicationsPatent pending design reduces common failures$1,031.89
- Yukon Gear & Axle®Mini SpoolPontiac Firebird 1981, Mini Spool by Yukon Gear & Axle®. 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...Provides 100% traction to both wheels at all timesInstalls into standard open carrier case$164.89 - $272.89
- Richmond®Excel™ Front Mini SpoolPontiac Firebird with GM 8.5" Series Axle 1981, Excel™ Front Mini Spool by Richmond®. Designed utilizing the latest technology, this product by Richmond features premium quality and will perform better than advertised. Perfect for...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$88.94
- Richmond®Street Gear Ring and Pinion Gear SetPontiac Firebird with 10 Bolt 1981, Street Gear Ring and Pinion Gear Set by Richmond®. Richmond Gear ring and pinions are perfect for any vehicle where performance and durability matters. Made from first-run steel, never recycled...Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability$305.99 - $529.99
- AllStar Performance®Mini SpoolPontiac Firebird with GM 7.5" Series Axle 1981, Mini Spool by AllStar Performance®. Drive with confidence and have the edge with AllStar Performance. With such a ground-breaking design and elaborate development, you’ll never run into...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$93.99
- AllStar Performance®Ring and Pinion Gear SetPontiac Firebird with 10 Bolt, GM 8.5" Series Axle 1981, Ring and Pinion Gear Set by AllStar Performance®. Drive with confidence and have the edge with AllStar Performance. With such a ground-breaking design and elaborate development,...Precise manufacturing and high-grade materialsExceptional performance at a competitive price$169.99
- Eaton®Detroit Truetrac™ Rear DifferentialPontiac Firebird 3.8L / 4.3L / 4.9L / 5.0L with 2.73 and Up Gear Ratio, 10 Bolt, 1.20" Axle Shaft Diameter, GM 8.5" Series Axle 1981, Detroit Truetrac™ Rear Differential by Eaton®. The Detroit Truetrac is a helical-gear style...Helical-style pinion gearsLimited-slip operation$634.99
- Eaton®Posi™ Rear DifferentialPontiac Firebird 3.8L with 2.73 and Up Gear Ratio, 10 Bolt, 1.20" Axle Shaft Diameter, Manual Locking Hubs, GM 8.5" Series Axle 1981, Posi™ Rear Differential by Eaton®. The Eaton Posi limited-slip differential prevents wheel slip...Superior rebuildable designRace-bred carbon friction discs$689.99
- Motive Gear®A-Line Ring and Pinion Gear SetPontiac Firebird with 10 Bolt 1981, A-Line Ring and Pinion Gear Set by Motive Gear®. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer ring and pinions for easy setup,...Quiet operationComputer controlled heat treatment$192.44 - $226.80
- Motive Gear®Performance Ring and Pinion Gear SetPontiac Firebird with 10 Bolt 1981, Performance Ring and Pinion Gear Set by Motive Gear®. Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Gear sets are made from first-run steel, Motive...Central contact patternCNC start to finish$291.99 - $515.99
- Motive Gear®Performance Ring and Pinion Gear SetPontiac Firebird with 10 Bolt 1981, Performance Ring and Pinion Gear Set by Motive Gear®. Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Gear sets are made from first-run steel, Motive...Central contact patternCNC start to finish$291.99 - $515.99
- Motive Gear®SpoolPontiac Firebird with 10 Bolt, GM 8.5" Series Axle 1981, Spool by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo...Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best$182.36 - $187.51
- Revolution Gear & Axle®Dry 2 Cut Ring and Pinion Gear SetPontiac Firebird 1981, Dry 2 Cut Ring and Pinion Gear Set by Revolution Gear & Axle®. Revolution Gear GM 8.5 Inch (1970 and Up) 10 Bolt Ring and Pinion Gear sets utilize the same gear cutting methods as the Original Equipment...Made to promote and inspire your off-road adventuresTested in demanding off-road conditions for maximum durability$210.99
- SKF®Rear Differential Pinion SealPontiac Firebird 1981, Rear Differential Pinion Seal by SKF®. Designed utilizing the latest technology, this product by SKF features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Superior protection against dirt and waterManufactured with high-quality tested design and materials for correct fit$7.91 - $14.11
- Timken®Rear Differential Bearing and Seal KitPontiac Firebird with 8.5" Ring Gear 1981, Rear Differential Bearing and Seal Kit by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller...Designed to effectively reduce frictionUltimate load handling capability$75.33 - $135.14
- Yukon Gear & Axle®Differential Bearing Installation KitPontiac Firebird 1981, Differential Bearing Installation Kit by Yukon Gear & Axle®. With Timken Bearings and Races. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance...Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain$199.89 - $394.89
- SKF®Rear Differential Pinion BearingPontiac Firebird 1981, Rear Differential Pinion Bearing by SKF®. When it comes to a top-notch replacement for your worn out factory part, this OE-quality differential component is right what the doctor ordered if you need to restore and...Excellent replacement for your worn out or faulty partDesigned to restore original performance and reliability$11.68 - $16.32
- SKF®Rear Differential Rebuild KitPontiac Firebird with 8.5" Ring Gear 1981, Rear Differential Rebuild Kit by SKF®. Designed utilizing the latest technology, this product by SKF features premium quality and will perform better than advertised. Perfect for your vehicle...Excellent replacement for your worn out or faulty partDesigned to restore original performance and reliability$115.92 - $143.34
- Timken®Rear Differential Pinion SealPontiac Firebird with 8.5" Ring Gear / with 8.75" Ring Gear 1981, Rear Differential Pinion Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$8.50
- Timken®Rear Differential RacePontiac Firebird 1981, Rear Differential Race by Timken®. Precision manufactured using premium materials and made by the company that is trusted by many carmakers, the Timken race is the right choice if you opt for a highly durable part...OE quality fit, performance, and reliabilityCost-effective friction management solution$6.76 - $8.87
- National®Rear Outer Differential Pinion SealPontiac Firebird with 8.5" Ring Gear, GMC Series Axle 1981, Rear Outer Differential Pinion Seal by National®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...National oil seals are recognized worldwide for their quality and reliable performance for every type of repair.Design Type: Spring Loaded; Multi-Lip$7.21
- SKF®Rear Differential Pinion RacePontiac Firebird 1981, Rear Differential Pinion Race by SKF®. Designed utilizing the latest technology, this product by SKF features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Excellent replacement for your worn out or faulty partDesigned to restore original performance and reliability$6.11 - $8.84
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