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
      $146.83 - $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
      $63.91 - $114.04
    • (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. The kit includes bearings,...
      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
      $15.40
    • (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
      $78.24
    • (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
      $112.00
    • (0 reviews)
      # 202155359
      GMC Jimmy 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 it the perfect deal for...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $39.91 - $40.33
    • (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
      $7.11 - $10.54
    • (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
      $12.06 - $16.59
    • (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
      $5.40 - $11.82
    • (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
      $5.03 - $12.29
    • (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
      $4.21 - $7.65
    • (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
      $11.93
    • (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
      $3.04
    • (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
      $1.74
    • (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
      $7.78 - $11.44
    • (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
      $4.16 - $7.14
    • (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
      $67.48 - $88.74
    • (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
      $8.07 - $15.29
    • (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
      $4.34 - $7.35
    • (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
      $19.10 - $20.11
    • (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
      $5.30 - $19.90
    • (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
      $3.07 - $3.74
    • (0 reviews)
      # 202155382
      GMC Jimmy with 8.5" Ring Gear with General Motors Series Axle with 30 Spline 1978, Differential Bearing 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
      $51.39 - $54.59
    • (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
      $12.60
    • (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
      $26.50
    • (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
      $11.88 - $19.09
    • (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
      $2.62 - $2.92
    • (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
      $4.58
    • (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
      $23.80
    • (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
      $9.52
    • (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
      $8.06 - $14.70
    • (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
      $9.61
    • (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
      $77.55 - $288.08
    • (0 reviews)
      # 742360454
      GMC Jimmy with GM 8.875" Series Axle with 12 Bolt 1978, 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...
      Quiet operationComputer controlled heat treatment
      $139.52
    • (0 reviews)
      # 1146112232
      GMC Jimmy with 3.90 and Up Gear Ratio with GM 8.875" Series Axle with 12 Bolt 1978, Rear Pro Gear Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive Gear Pro Gear ring and pinions are perfect for dedicated racing or...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $322.73 - $357.66
    • (0 reviews)
      # 503498061
      GMC Jimmy 1978, 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
      $185.78 - $237.47
    • (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
      $690.15 - $823.58
    • (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
      $511.66 - $558.41
    • (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®. Location: Rear. The Eaton Posi limited-slip differential prevents wheel slip before...
      Superior rebuildable designRace-bred carbon friction discs
      $498.96
    • (0 reviews)
      # mpn4517167240
      GMC Jimmy with 2.73 and Up Gear Ratio with 8.5" Series Axle with 10 Bolt 1978, 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...
      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
      $129.99
    • (0 reviews)
      # 503566512
      GMC Jimmy Base / High Sierra / Sierra Classic / Sierra Grande 4.1L / 5.0L / 5.7L 1978, Air Locker by ARB®. Air locker locking differentials allow you to tackle the toughest terrain. The world's premier traction aid, ARB air lockers keep...
      Differential CaseFlange Cap Assembly
      $940.50
    • (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
      $390.46 - $416.16
    • (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
      $474.91 - $518.98
    • (0 reviews)
      # mpn4517168990
      GMC Jimmy with 30 Spline with 3.73 and Down Gear Ratio with Dana 44 Series Axle with Dual Drilled for 3/8" Ring Gear Bolts / with Dual Drilled for 7/16" Ring Gear Bolts 1978, Grip Pro Traction System by Powertrax®. The Powertrax Grip...
      Comes Fully AssembledDelivers Progressive and Variable Traction
      $424.97
    • (0 reviews)
      # 503611352
      GMC Jimmy with 30 Spline with Open Differential 1978, Lock Right Locker by Powertrax®. Powertrax Lock-Right performance lockers’ straight-line performance is equal to a solid spool axle, yet they automatically unlock during turns....
      Brute force devices for rugged applicationsReplacement of differential case not required
      $332.03 - $343.29
    • (0 reviews)
      # 742313443
      GMC Jimmy with 30 Spline 1978, No-Slip Traction System by Powertrax®. For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the...
      Extreme Traction PerformanceEnables a 2 Wheel Drive to outperform a 4 Wheel Drive in poor traction conditions
      $430.01 - $452.01
    • (0 reviews)
      # 742236718
      GMC Jimmy with 30 Spline with GM 8.875" Series Axle 1978, Open Grip LS Traction System by Powertrax®. The Powertrax Grip LS, is a clutch-type differential in a forged steel case. This differential uses a set of carbon clutch discs to...
      Comes Fully AssembledCarbon Fiber and Steel Friction Plate Technology
      $438.45 - $448.19
    • (0 reviews)
      # mpn4517169411
      GMC Jimmy with 30 Spline with 3.92 and Up Gear Ratio with Dana 44 Series Axle 1978, Open Grip Lok Traction System by Powertrax®. If you are looking for the ultimate in traction, the Powertrax Grip Lok can handle the torque of engines...
      Comes Fully AssembledTraction Adding Differential Technology
      $600.71
    • (0 reviews)
      # 742112767
      GMC Jimmy with GM 8.875" Series Axle with 12 Bolt 1978, Rear Street Gear Ring and Pinion Gear Set by Richmond®. Location: Rear. Richmond Gear ring and pinions are perfect for any vehicle where performance and durability matters. Made...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $214.67 - $254.22
    • (0 reviews)
      # 742314409
      GMC Jimmy with 30 Spline with Dana 44 Series Axle 1978, Front Differential Locker by Aussie Locker®. Location: Front. The Aussie Locker is the most advanced "traction added" Automatic Precision Locker in the world today. Specifically...
      High quality at an affordable priceExpertly made from premium materials
      $289.75
    • (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
      $77.41 - $94.73
    • (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
      $104.99 - $245.80
    • (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
      $32.11 - $59.93
    • (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
      $81.02 - $120.37
    • (0 reviews)
      # 503665031
      GMC Jimmy with Open Differential 1978, Mini Spool 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
      $81.49
    • (0 reviews)
      # 742169749
      GMC Jimmy with GM 8.875" Series Axle with 12 Bolt 1978, Rear Differential Super Bearing Kit by Motive Gear®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $113.80 - $118.62
    • (0 reviews)
      # 126498792
      GMC Jimmy 1978, 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 rigid quality control processes to insure...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $148.35 - $210.99
    • (0 reviews)
      # mpn4517168046
      GMC Jimmy with GM 8.5" Series Axle 1978, Rear Differential Master Overhaul Kit by Spicer®. Location: Rear. Genuine Spicer overhaul kit include all the latest production upgrades, so the parts you’re installing are as good or better...
      Save Money: Buying components separately can be costly and cumbersomeSave Downtime: Be ready to perform a repair or overhaul as you need it
      $171.26
    • (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




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