1981 Ford F-100 Differentials & Components

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    • (0 reviews)
      # 111372865
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Ring and Pinion Gear Set by USA Standard Gear®. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line...
      Direct-fit OE-quality replacement for your factory partHelps restore the proper functionality of your vehicle
      $202.73 - $241.81
    • (0 reviews)
      # mpn2412746
      Ford F-100 with 9" Ring Gear with 3.50 Ratio 1981, 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...
      Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit
      $140.04
    • (0 reviews)
      # 68552246
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Master Overhaul Bearing Kit by USA Standard Gear®. USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. When...
      Uses Koyo bearings and racesExpertly crafted from premium materials
      $149.38 - $194.69
    • (0 reviews)
      # mpn2020889
      Ford F-100 with 9" Ring Gear with 31 Spline 1981, Rear Axle Differential Bearing and Seal Kit by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered...
      Designed to effectively reduce frictionUltimate load handling capability
      $105.46
    • (0 reviews)
      # 531171202
      Ford F-100 1981, Differential Bearing Kit by Dorman®. Dorman’s Differential Bearing Kit allows you to keep all the necessary components for installation of the Differential Ring and Pinion readily on hand. The kit includes bearings,...
      Replacement eliminates driveline grinding and whining soundsRobust steel construction ensures durability for years of service
      $138.95 - $223.35
    • (0 reviews)
      # 111372838
      Ford F-100 with 9" Ring Gear with Ford Series Axle with LM102949 Carrier Races 1981, Rear Differential Bearing Kit by USA Standard Gear®. This kit uses Koyo bearings and races along with all high quality small parts. USA Standard Gear...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $102.12
    • (0 reviews)
      # 111372841
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Mini Spool by USA Standard Gear®. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. When it comes to a top-notch replacement for your worn...
      Installs into a standard open carrier caseProvides 100% traction to both wheels at all times
      $33.51
    • (0 reviews)
      # 765114809
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Pinion Installation Kit by USA Standard Gear®. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $86.57
    • (0 reviews)
      # 111372913
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Spider Gear Set by USA Standard Gear®. USA Standard gear sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of gear sets for a...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $132.42 - $168.01
    • (0 reviews)
      # 111372954
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Spool by USA Standard Gear®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
      Provides 100% traction to both wheels at all timesNot recommended for street driven vehicles
      $112.60
    • (0 reviews)
      # 212833441
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Basic Series Differential Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $16.84 - $26.10
    • (0 reviews)
      # 212833447
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Complete Series™ Differential Kit by Ratech®.
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $86.12 - $122.00
    • (0 reviews)
      # mpn358588472
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Clutch Pack Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $54.66
    • (0 reviews)
      # 212833506
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Differential Installation Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $23.96 - $45.34
    • (0 reviews)
      # 531054067
      Ford F-100 with 8.38" Ring Gear 1981, Rear Differential Bearing by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all...
      Designed to effectively reduce frictionUltimate load handling capability
      $7.74
    • (0 reviews)
      # mpn2040421
      Ford F-100 with 9" Ring Gear 1981, Rear Differential Bearing Set by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all...
      Designed to effectively reduce frictionUltimate load handling capability
      $9.67
    • (0 reviews)
      # 531168963
      Ford F-100 1981, Rear Differential Pinion Pilot Bearing by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all feature...
      Designed to effectively reduce frictionUltimate load handling capability
      $22.38
    • (0 reviews)
      # mpn2054363
      Ford F-100 with 8.38" Ring Gear / with 9" 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 and help...
      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
      $6.53
    • (0 reviews)
      # 531116811
      Ford F-100 with 8.38" Ring Gear 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...
      OE quality fit, performance, and reliabilityCost-effective friction management solution
      $4.21
    • (0 reviews)
      # mpn2371034
      Ford F-100 with 8.8" Ring Gear / with 9.75" Ring Gear 1981, Differential Crush Sleeves by Dorman®. A necessary item to replace when servicing the differential, Dorman’s Differential Crush Sleeve is durably built to retain optimal...
      Direct replacement for a proper fit every timeDesigned specifically for rear-wheel drive vehicles
      $3.04
    • (0 reviews)
      # 531187483
      Ford F-100 1981, Axle Differential Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment technology to ensure ultimate performance and...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $7.61 - $10.46
    • (0 reviews)
      # 1094932928
      Ford F-100 1981, Axle Differential Bearing Race by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform optimally. It is built to the original equipment...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $3.99 - $7.14
    • (0 reviews)
      # 1095063707
      Ford F-100 1981, Axle Differential Bearing and Seal Kit by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment technology to ensure ultimate...
      Spindle bearing and seal kitIncludes all components required to complete the repair
      $71.94 - $90.86
    • (0 reviews)
      # 531074099
      Ford F-100 1981, Differential Pinion Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment technology to ensure ultimate performance and...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $8.07 - $15.29
    • (0 reviews)
      # 1094949876
      Ford F-100 1981, Differential Pinion Race by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform optimally. It is built to the original equipment specifications...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.34 - $6.81
    • (0 reviews)
      # 1095026937
      Ford F-100 1981, Differential Pinion Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform optimally. It is built to the original equipment...
      National Redi-Sleeves are precision stainless steel wear sleeves designed to quickly repair damaged, grooved or worn shaftsStrong, durable stainless steel construction provides a corrosion-free sealing surface that surpasses most original shaft specifications
      $19.10 - $19.44
    • (0 reviews)
      # 531194520
      Ford F-100 1981, 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 with customers in mind, this product by National will...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $6.97 - $19.90
    • (0 reviews)
      # mpn1848355976
      Ford F-100 with 9" Ring Gear with Ford Series Axle 1981, Rear Differential Pinion Pilot Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $20.78
    • (0 reviews)
      # mpn358588597
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Crush Sleeve by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $2.92
    • (0 reviews)
      # 202160201
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Bearing Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $62.32 - $62.66
    • (0 reviews)
      # 1148400008
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Bearing Race by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $7.56 - $12.36
    • (0 reviews)
      # 212833435
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Bearing Spacer by Ratech®. Designed with precision and functionality in mind, this accessory ensures...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $3.03 - $40.09
    • (0 reviews)
      # 212833480
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Differential Carrier Bearing Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $22.70 - $44.27
    • (0 reviews)
      # 212833459
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Differential Pinion Bearing by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $11.89 - $28.76
    • (0 reviews)
      # mpn358588470
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Pinion Nut by Ratech®. 1-14" thread size. Fits 35-spline differentials with 1/2" ring gear bolts. Designed with...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $6.65
    • (0 reviews)
      # 206590042
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Differential Pinion Seal by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $5.48 - $7.71
    • (0 reviews)
      # mpn358588577
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Differential Pinion Shim by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $13.31
    • (0 reviews)
      # 212833522
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with Dana 60 Series Axle / with Dana 70 HD Series Axle / with Dana 70 Series Axle / with Dana 70 U Series Axle 1981, Differrential Carrier Shim Set by Ratech®. Designed utilizing...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $9.25
    • (0 reviews)
      # mpn358588730
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 9" Ring Gear with General Motors Series Axle 1981, Pilot Bearing Retainer Clip by Ratech®. Designed with precision and functionality in mind, this accessory ensures...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $3.38
    • (0 reviews)
      # 202160221
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT 1981, Ring Gear Bolt Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $9.25 - $18.49
    • (0 reviews)
      # 503468440
      Ford F-100 with Ford 9" Series Axle with 10 Bolt 1981, Rear A-Line Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer...
      Quiet operationComputer controlled heat treatment
      $140.88 - $165.16
    • (0 reviews)
      # mpn4517168270
      Ford F-100 with 4 Pinion Gear with Ford 9" Series Axle 1981, Rear Differential Carrier by Motive Gear®. Without Internal Kit. Location: Rear. All Motive Gear products are engineered for their specific application and manufactured in...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $204.46
    • (0 reviews)
      # 1091295461
      Ford F-100 with Ford 9" Series Axle with 10 Bolt with Dual Drilled for 1/2" Ring Gear Bolts / with Dual Drilled for 7/16" Ring Gear Bolts 1981, Rear Lightweight Pro Gear Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $341.48 - $561.60
    • (0 reviews)
      # 1091650722
      Ford F-100 with Ford 9" Series Axle with 10 Bolt 1981, Rear Performance Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Gear sets...
      Central contact patternCNC start to finish
      $203.94 - $718.77
    • (0 reviews)
      # 503399232
      Ford 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
      $187.65 - $245.52
    • (0 reviews)
      # mpn4517169385
      Ford F-100 W/O Limited Slip Differential with Dana 44 Series Axle 1981, Front Unloaded Differential Case Kit by Spicer®. Without Spider Gears. Location: Front. This product is made of high-quality materials to serve you for years to...
      High quality at an affordable priceExpertly made from premium materials
      $97.04
    • (0 reviews)
      # 1091360470
      Ford F-100 1981, Ring and Pinion Gear Set by Alloy USA®. Mounting larger diameter wheels and tires requires a gear ratio change to maintain the same performance. But even if you're not getting new skins, changing to a lower gear ratio...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $225.36 - $580.06
    • (0 reviews)
      # 1029359535
      Ford F-100 with GM 9" Series Axle with 10 Bolt 1981, Detroit Locker™ Rear Differential by Eaton®. Location: Rear. The Detroit Locker is a 100%-automatic locking differential that provides ultimate traction for mild to extreme vehicle...
      100% automatic locking - no driver action neededProvides maximum amount of traction to both wheel ends
      $610.04 - $924.95
    • (0 reviews)
      # mpn4517169954
      Ford F-100 with 3.25 and Up Gear Ratio with GM 9" Series Axle with 10 Bolt with 1.32" Axle Shaft Diameter 1981, Detroit Truetrac™ Rear Differential by Eaton®. Location: Rear. The Detroit Truetrac is a helical-gear style performance...
      Helical-style pinion gearsLimited-slip operation
      $511.83
    • (0 reviews)
      # 503692519
      Ford F-100 with Ford 9" Series Axle 1/2 Ton 1981, Rear Dropout Housing by Yukon Gear & Axle®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with...
      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
      $405.93 - $464.97
    • (0 reviews)
      # 503502127
      Ford F-100 with Ford 9" Series Axle 1/2 Ton 1981, Rear Grizzly Locker by Yukon Gear & Axle®. Location: Rear. The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing. Grizzly...
      Available for many popular off-road & performance applicationsPatent pending design reduces common failures
      $602.01 - $796.59
    • (0 reviews)
      # 68552342
      Ford F-100 with Ford 9" Series Axle 1/2 Ton 1981, Rear High Performance Ring and Pinion Gear Set by Yukon Gear & Axle®. Location: Rear. Yukon Ring and Pinion sets give you the confidence of knowing you’re running gears designed for...
      Smooth finishEasy Set-Up
      $219.42 - $1,288.56
    • (0 reviews)
      # 68552243
      Ford F-100 with 2 Pinion Design / with 4 Pinion Design with Ford 9" Series Axle 1/2 Ton 1981, Rear Standard Open Carrier Case by Yukon Gear & Axle®. Without Spider Gears. Location: Rear. Dominate the track or hit the trails with...
      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
      $168.71
    • (0 reviews)
      # 503520160
      Ford F-100 with Ford 9" Series Axle 1/2 Ton 1981, Rear Trac Loc Positraction by Yukon Gear & Axle®. Location: Rear. Companies have tried to reproduce the factory Ford 8" and 9" Trac Loc with limited success. Yukon took on this project...
      Forged case and billet steel left case halfForged 4320 internals for maximum strength
      $547.60
    • (0 reviews)
      # 1029199630
      Ford F-100 with Ford 9" Series Axle 1/2 Ton 1981, Rear Zip Locker by Yukon Gear & Axle®. Location: Rear. The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to...
      Air operated locker provides on-demand tractionForged case & 8620 internals for added strength
      $899.22 - $959.40
    • (0 reviews)
      # 1091643722
      Ford F-100 with Ford 9" Series Axle 1981, Competition Series™ Rear Ring and Pinion Gear Set by G2 Axle & Gear®. Location: Rear. G2’s line of Competition Series ring and pinions are engineered and manufactured to handle the increased...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $599.99
    • (0 reviews)
      # 1091283457
      Ford F-100 with 4 Pinion Gear with 9" Series Axle with 10 Bolt 1981, Differential Carrier Case by G2 Axle & Gear®. 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
      $224.99 - $289.99
    • (0 reviews)
      # 1091612723
      Ford F-100 with Ford 9" Series Axle 1981, Performance Series™ Ring and Pinion Gear Set by G2 Axle & Gear®. G2’s line of Performance Series ring and pinions are engineered and manufactured to handle the increased loads of today’s...
      Forged 8620 SteelPrecision-machined for exact fit
      $239.99
    • (0 reviews)
      # 742344483
      Ford F-100 with Ford 9" Series Axle 1981, Rear Differential Housing by G2 Axle & Gear®. Location: Rear. Designed utilizing the latest technology, this product by G2 Axle & Gear features premium quality and will perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $319.99 - $329.99
    • (0 reviews)
      # mpn4517168626
      Ford F-100 Custom / Ranger / Ranger Lariat / Ranger XLT with 31 Shaft Spline with Ford 9" Series Axle with 10 Bolt 1981, Air Locker by ARB®. Air locker locking differentials allow you to tackle the toughest terrain. The world's premier...
      Differential CaseFlange Cap Assembly
      $940.50




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