1981 Ford F-100 Differentials
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Richmond®Excel™ Ring and Pinion Gear SetFord F-100 1981, Excel™ 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 your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$238.99 - $284.99 - Motive Gear®Rear A-Line Ring and Pinion Gear SetFord F-100 with 10 Bolt, Ford 9" Series Axle 1981, Rear 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...Quiet operationComputer controlled heat treatment$193.76 - $227.17
- Powertrax®Lock Right LockerFord F-100 with Open Differential 1981, Lock Right Locker by Powertrax®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...Brute force devices for rugged applicationsReplacement of differential case not required$296.98 - $340.98
- ARB®Air Locker™ DifferentialFord F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 31 Shaft Spline, 10 Bolt, Ford 9" Series Axle 1981, Air Locker™ Differential by ARB®. Created to provide 100% traction on demand, without sacrificing any of your vehicle's...Differential CaseFlange Cap Assembly$1,091.00
- Auburn Gear®Grip-N-Loc™ DifferentialFord F-100 1981, Grip-N-Loc™ 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 reengineered to...Upgrades vehicles for safe transfer of increased power/torque across the axleCase material is up to 50% stronger than OE cases$639.73 - $726.02
- Yukon Gear & Axle®High Performance Ring and Pinion Gear SetFord F-100 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$378.89 - $1,999.89
- Dorman®OE Solutions™ Rear Differential Ring and PinionFord F-100 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$164.40 - $687.83
- Yukon Gear & Axle®Grizzly Locker™ Rear DifferentialFord F-100 with Ford 9" Series Axle 1981, Grizzly Locker™ Rear Differential by Yukon Gear & Axle®. The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing. Grizzly Lockers...Available for many popular off-road & performance applicationsPatent pending design reduces common failures$899.89 - $1,180.89
- Yukon Gear & Axle®Rear Dropout HousingFord F-100 with Ford 9" Series Axle 1981, Rear Dropout Housing by Yukon Gear & Axle®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...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$612.89 - $745.89
- Yukon Gear & Axle®Rear Mini SpoolFord F-100 with Ford 9" Series Axle 1981, Rear 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%...Provides 100% traction to both wheels at all timesInstalls into standard open carrier case$54.89
- Yukon Gear & Axle®Trac Loc™ Rear DifferentialFord F-100 with Ford 9" Series Axle 1981, Trac Loc™ Rear Differential by Yukon Gear & Axle®. Yukon took on this project by looking for ways to make it better. By designing a thicker 1541H billet hat that added more strength, they...Forged case and billet steel left case halfForged 4320 internals for maximum strength$795.89 - $799.89
- Spicer®Rear Mini SpoolFord F-100 with 28 Spline, Ford 9" 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 or...Expertly crafted from premium materialsDesigned to match rigorous quality standards$52.40
- Spicer®Rear Third Member CaseFord F-100 with 3.250" Carrier Bore, 35 Spline / 40 Spline 1981, Rear Third Member Case by Spicer®. Wherever limits are tested, Dana is there with products engineered to meet the needs of off-roaders, racers, and more. We offer Spicer...Expertly crafted from premium materialsDesigned to match rigorous quality standards$395.61
- Ford Performance®High Strength Ring and Pinion Gear SetFord F-100 with Ford 8.8" Series Axle 1981, High Strength Ring and Pinion Gear Set by Ford Performance®. Dominate the track or hit the trails with condidence by fine tuning your vehicle for neck-breaking speed and performance with this...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$232.11
- Richmond®Excel™ Rear Differential CarrierFord F-100 Empty Case Housing with 4 Pinion Design, Ford 9" Series Axle 1981, Excel™ Rear Differential Carrier by Richmond®. Designed utilizing the latest technology, this product by Richmond features premium quality and will perform...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$288.08
- Richmond®Pro Gear Ring and Pinion Gear SetFord F-100 1981, Pro 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 material, Richmond ring and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$462.60 - $719.99
- Richmond®Rear Street Gear Ring and Pinion Gear SetFord F-100 with 10 Bolt, Ford 9" Series Axle 1981, Rear 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,...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$315.99 - $719.99
- Powertrax®Grip Pro Traction SystemFord F-100 1981, Grip Pro Traction System by Powertrax®. The Powertrax Grip Pro is a gear driven limited slip differential designed to be among the strongest and most durable in the industry. It combines the smooth operation of a...Comes Fully AssembledDelivers Progressive and Variable Traction$566.71 - $1,081.78
- AllStar Performance®Mini SpoolFord F-100 with 10 Bolt, Ford 9" Series Axle 1981, Mini Spool by AllStar Performance®. Lightweight. Drive with confidence and have the edge with AllStar Performance. With such a ground-breaking design and elaborate development, you’ll...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$29.99
- AllStar Performance®Ring and Pinion Gear SetFord F-100 with 10 Bolt, Ford 9" 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
- AllStar Performance®SpoolFord F-100 with Ford 9" Series Axle 1981, Spool by AllStar Performance®. Replace a troublesome positive traction unit with a high quality Allstar spool. Substantially lighter than conventional carriers, spools deliver equal power to...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$149.99 - $199.99
- Eaton®Detroit Locker™ Rear DifferentialFord F-100 with 3.25 and Up Gear Ratio, 10 Bolt, GM 9" Series Axle 1981, Detroit Locker™ Rear Differential by Eaton®. The Detroit Locker is a 100%-automatic locking differential that provides ultimate traction for mild to extreme...100% automatic locking - no driver action neededProvides maximum amount of traction to both wheel ends$769.99
- Eaton®Detroit Truetrac™ Rear DifferentialFord F-100 with 3.25 and Up Gear Ratio, 10 Bolt, 1.32" Axle Shaft Diameter, GM 9" Series Axle 1981, Detroit Truetrac™ Rear Differential by Eaton®. The Detroit Truetrac is a helical-gear style performance differential that maximizes...Helical-style pinion gearsLimited-slip operation$626.99
- Motive Gear®Performance Rear Ring and Pinion Gear SetFord F-100 with Ford 9" Series Axle 1981, Performance Rear 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,...Central contact patternCNC start to finish$303.99 - $853.99
- Motive Gear®Rear Lightweight Pro Gear Ring and Pinion Gear SetFord F-100 with 10 Bolt, Dual Drilled for 1/2" Ring Gear Bolts / Dual Drilled for 7/16" Ring Gear Bolts, Ford 9" Series Axle 1981, Rear Lightweight Pro Gear Ring and Pinion Gear Set by Motive Gear®. Motive Gear Pro Gear ring and pinions...Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best$598.99 - $699.99
- Motive Gear®Rear Lightweight SpoolFord F-100 with 10 Bolt, GM 9" Series Axle 1981, Rear Lightweight 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...Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best$131.69 - $195.85
- Motive Gear®Ring and Pinion Gear SetFord F-100 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, quality, and...Quiet operationComputer controlled heat treatment$307.99 - $399.99
- Yukon Gear & Axle®Rear Differential Bearing Installation KitFord F-100 with Ford 9.00" Series Axle 1981, Rear 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...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 - $292.89
- SKF®Differential Pinion SealFord F-100 1981, 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$11.03 - $14.22
- Timken®Rear Differential Bearing and Seal KitFord F-100 with 9.0" 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 bearings,...Designed to effectively reduce frictionUltimate load handling capability$117.36 - $145.33
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