1978 GMC Jimmy Differentials & Components

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    • (0 reviews)
      # 531171911
      GMC Jimmy 1978, Front 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 construction ensures...
      Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit
      $149.13 - $204.95
    • (0 reviews)
      # 531133036
      GMC Jimmy 1978, Axle 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, and all feature...
      Designed to effectively reduce frictionUltimate load handling capability
      $62.64 - $116.74
    • (0 reviews)
      # 531179914
      GMC Jimmy 1978, 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.
      Replacement eliminates driveline grinding and whining soundsRobust steel construction ensures durability for years of service
      $122.95 - $138.95
    • (0 reviews)
      # mpn358588626
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle with 30 Pinion Spline 1978, Basic Series Differential Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $15.70
    • (0 reviews)
      # mpn358588602
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Complete Series™ Differential Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $80.65
    • (0 reviews)
      # mpn358588584
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Deluxe Series Differential Kit With Pinion 10-Bolt by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $114.19
    • (0 reviews)
      # mpn358588453
      GMC Jimmy with 8.875" Ring Gear with General Motors Series Axle 1978, Differential Installation Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $41.12
    • (0 reviews)
      # 531196543
      GMC Jimmy 1978, Differential Bearing by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all feature premium design, enhanced...
      Designed to effectively reduce frictionUltimate load handling capability
      $6.97 - $10.32
    • (0 reviews)
      # 531136966
      GMC Jimmy 1978, Differential Pinion Bearing by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all feature premium design,...
      Designed to effectively reduce frictionUltimate load handling capability
      $11.81 - $16.27
    • (0 reviews)
      # 531083216
      GMC Jimmy 1978, Differential Pinion 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 that...
      OE quality fit, performance, and reliabilityCost-effective friction management solution
      $5.29 - $11.59
    • (0 reviews)
      # 531129977
      GMC Jimmy 1978, 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 retain lubricants and liquids, ensuring...
      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
      $4.93 - $12.05
    • (0 reviews)
      # 531170698
      GMC Jimmy 1978, 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 that...
      OE quality fit, performance, and reliabilityCost-effective friction management solution
      $4.13 - $7.50
    • (0 reviews)
      # mpn2035566
      GMC Jimmy with 8.88" Ring Gear 1978, 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
      $11.71
    • (0 reviews)
      # mpn2377089
      GMC Jimmy with 8.5-8.75" Ring Gear 1978, 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 pressure when the...
      Direct replacement for a proper fit every timeDesigned specifically for rear-wheel drive vehicles
      $2.98
    • (0 reviews)
      # 531128034
      GMC Jimmy 1978, Differential Pinion Shaft Lock Bolt by Dorman®. Engineered from high-quality metal, Dorman’s Differential Pinion Shaft Lock Bolt effectively retains the pinion shaft to the rear differential. The Bolt is recommended...
      Replacement restores drivabilityDirect replacement for a proper fit
      $1.72
    • (0 reviews)
      # 531118007
      GMC Jimmy 1978, 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
      $8.38 - $12.43
    • (0 reviews)
      # 531143742
      GMC Jimmy with 8.5" Ring Gear 1978, 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...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.24 - $7.28
    • (0 reviews)
      # 531099290
      GMC Jimmy 1978, 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
      $56.28 - $73.50
    • (0 reviews)
      # 531086888
      GMC Jimmy 1978, 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
      $8.80 - $16.53
    • (0 reviews)
      # 531161544
      GMC Jimmy 1978, 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 to...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.78 - $7.50
    • (0 reviews)
      # mpn1362498
      GMC Jimmy Tremec Transmission 1978, Multi Purpose 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 oil seals are recognized worldwide for their quality and reliable performance for every type of repair.Design Type: Spring Loaded; Single-Lip
      $5.84
    • (0 reviews)
      # 531180190
      GMC Jimmy 1978, Outer 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
      $19.48 - $20.51
    • (0 reviews)
      # 531104995
      GMC Jimmy 1978, 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 with customers in mind, this product by National...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $5.41 - $20.29
    • (0 reviews)
      # 202155341
      GMC Jimmy with General Motors Series Axle 1978, Crush Sleeve by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for your ultimate...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $3.13 - $3.82
    • (0 reviews)
      # mpn358588625
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Differential Bearing Spacer With Shim Pack by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $12.27
    • (0 reviews)
      # mpn358588670
      GMC Jimmy with 8.875" Ring Gear with General Motors Series Axle 1978, Differential Carrier Bearing Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $27.02
    • (0 reviews)
      # 202155348
      GMC Jimmy with General Motors Series Axle 1978, Differential Pinion Bearing by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $16.52 - $19.47
    • (0 reviews)
      # 202155362
      GMC Jimmy with General Motors Series Axle 1978, Differential Pinion Nut by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for your...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $2.45 - $2.96
    • (0 reviews)
      # mpn358588647
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Differential Pinion Seal 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
      $4.24
    • (0 reviews)
      # mpn358588440
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Differrential Carrier Shim Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $24.26
    • (0 reviews)
      # mpn358588439
      GMC Jimmy with 8.875" Ring Gear with General Motors Series Axle 1978, Pinion Shim Set 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
      $8.84
    • (0 reviews)
      # 202155376
      GMC Jimmy with General Motors Series Axle 1978, 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 for your...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $8.22 - $16.64
    • (0 reviews)
      # mpn358588433
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle 1978, Smart Sleeve Crush Sleeve 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
      $9.80
    • (0 reviews)
      # 503566512
      GMC Jimmy Base / High Sierra / Sierra Classic / Sierra Grande 4.1L / 5.0L / 5.7L 1978, Air Locker by ARB®. Created to provide 100% traction on demand, without sacrificing any of your vehicle's highway driving performance, ARB Air...
      Differential CaseFlange Cap Assembly
      $940.50
    • (0 reviews)
      # mpn4554792024
      GMC Jimmy with GM 8.5" Series Axle with TrueTrac Differential 1978, 12 Point Ring Gear Bolt Kit by ARP®. The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today’s sticky tire compounds or the...
      Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability
      $65.36
    • (0 reviews)
      # 990430105
      GMC Jimmy 1978, Differential Cross Pin by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance 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
      $18.99
    • (0 reviews)
      # mpn4515290619
      GMC Jimmy with GM 7.5" Series Axle / with GM 8.5" Series Axle 1978, Differential Pinion Nut by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $4.99
    • (0 reviews)
      # 990417375
      GMC Jimmy 1978, Differential Pinion Seal by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.99
    • (0 reviews)
      # mpn4515290647
      GMC Jimmy with GM 7.5" Series Axle 1978, Mini Spool by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than advertised. Perfect for...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $96.99
    • (0 reviews)
      # mpn4515294792
      GMC Jimmy with GM 7.5" Series Axle 1978, Ring Gear Spacer by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than advertised. Perfect...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $52.99
    • (0 reviews)
      # 990392130
      GMC Jimmy with GM 8.5" Series Axle with 10 Bolt 1978, Ring and Pinion Gear Set by AllStar Performance®. CA Prop 65 WARNING - This product contains chemicals known to the State of California to cause cancer, and/or birth defects or other...
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $149.99
    • (0 reviews)
      # 1017022768
      GMC Jimmy 1978, Ring and Pinion Installation Bearing Kit by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than advertised. Perfect...
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $99.99 - $112.99
    • (0 reviews)
      # 1066632507
      GMC Jimmy 1978, Ring and Pinion Installation Shim Kit by AllStar Performance®. CA Prop 65 WARNING - This product contains chemicals known to the State of California to cause cancer, and/or birth defects or other reproductive harm.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $38.99 - $45.99
    • (0 reviews)
      # 503422484
      GMC Jimmy 4.1L / 5.0L / 5.7L with 28 Spline with 2.73 and Up Gear Ratio with GM 8.5" Series Axle with 10 Bolt 1978, Front Differential Spring Retainer Service Kit by Auburn Gear®. Dominate the track or hit the trails with confidence by...
      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
      $113.82
    • (0 reviews)
      # 1029172587
      GMC Jimmy 4.1L / 5.0L / 5.7L 1978, HP™ Limited Slip Differential by Auburn Gear®. High Performance. Auburn Gear’s flagship limited-slip differential gives you smooth torque-sensing operation with the correct bias ratios to out...
      Expertly crafted from superior materialsProvides exceptional reliability
      $410.59 - $436.80
    • (0 reviews)
      # 1029076559
      GMC Jimmy 4.1L / 5.0L / 5.7L 1978, Pro™ Limited Slip Differential by Auburn Gear®. Turns your torque up another notch, offering an even higher bias ratio and faster sensing reaction than HP for the very best in controlled power...
      Expertly crafted from superior materialsProvides exceptional reliability
      $502.94 - $549.12
    • (0 reviews)
      # mpn4517168639
      GMC Jimmy with 30 Spline with Dana 44 Series Axle 1978, Front Differential Locker by Aussie Locker®. The Aussie Locker is the most advanced "traction added" Automatic Precision Locker in the world today. Specifically designed for...
      High quality at an affordable priceExpertly made from premium materials
      $289.75
    • (0 reviews)
      # mpn4517169130
      GMC Jimmy with 30 Spline with Dana 44 Series Axle 1978, Front Differential Locker Pin and Spring Kit by Aussie Locker®. Dominate the track or hit the trails with condidence by fine tuning your vehicle for neck-breaking speed and...
      High quality at an affordable priceExpertly made from premium materials
      $35.40
    • (0 reviews)
      # 1029097615
      GMC Jimmy 1978, Detroit Locker™ Differential by Eaton®. The Detroit Locker is a 100%-automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, bullet-proof design is...
      100% automatic locking - no driver action neededProvides maximum amount of traction to both wheel ends
      $705.56 - $828.54
    • (0 reviews)
      # 1029217553
      GMC Jimmy 1978, Detroit Truetrac™ Differential by Eaton®. The Detroit Truetrac is a helical-gear style performance differential that maximizes wheel traction and enhances driving and handling characteristics. Operation of the Truetrac...
      Helical-style pinion gearsLimited-slip operation
      $506.92 - $563.27
    • (0 reviews)
      # mpn4517170070
      GMC Jimmy with 3.73 and Up Gear Ratio with GM 8.875" Series Axle with 12 Bolt with 1.30" Axle Shaft Diameter 1978, Posi™ Rear Differential by Eaton®. The Eaton Posi limited-slip differential prevents wheel slip before it can get...
      Superior rebuildable designRace-bred carbon friction discs
      $489.99
    • (0 reviews)
      # 503686599
      GMC Jimmy 1978, Differential Installation Kit by G2 Axle & Gear®. For low mileage vehicles, G2 offers installation kits that have all the same components as the master kits, sans the bearings. This is an economically priced kit that...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $43.99 - $56.99
    • (0 reviews)
      # 503673076
      GMC Jimmy 1978, Differential Master Installation Kit by G2 Axle & Gear®. G2’s master installation kits come complete with everything you need to properly set up your ring and pinion gear set. Designed utilizing the latest technology,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $121.99 - $122.99
    • (0 reviews)
      # 742321409
      GMC Jimmy 1978, Differential Bearing Kit 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 rigid quality control...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $78.93 - $96.58
    • (0 reviews)
      # 503694213
      GMC Jimmy 1978, Differential Carrier by Motive Gear®. Without Internal Kit. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo rigid...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $79.07 - $293.73
    • (0 reviews)
      # 742171719
      GMC Jimmy 1978, Differential Carrier Gear Kit by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential component that...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $107.05 - $250.62
    • (0 reviews)
      # 1029163591
      GMC Jimmy 1978, Differential Carrier Shim Kit 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 rigid quality control...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $17.65 - $21.78
    • (0 reviews)
      # mpn4517167611
      GMC Jimmy with 8.5" Series Axle with 10 Bolt 1978, Differential Crush Sleeve by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $3.01
    • (0 reviews)
      # 503700252
      GMC Jimmy 1978, Differential Gear Installation Kit 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 rigid quality...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $32.74 - $61.10
    • (0 reviews)
      # 742153755
      GMC Jimmy 1978, Differential Master Bearing Kit 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 rigid quality...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $82.61 - $122.73




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