1978 Mercury Zephyr Differentials & Components

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    • (0 reviews)
      # 531071061
      Mercury Zephyr with 7.5" Ring Gear 1978, 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...
      Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit
      $113.52 - $180.95
    • (1 review)
      # mpn2020890
      Mercury Zephyr 1978, 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 roller bearings, and all...
      Designed to effectively reduce frictionUltimate load handling capability
      $84.86
    • (0 reviews)
      # mpn2412741
      Mercury Zephyr with 7.5" Ring Gear 1978, Rear 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
      $109.95
    • (0 reviews)
      # mpn358588464
      Mercury Zephyr with 8" 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
      $31.60
    • (0 reviews)
      # 531080412
      Mercury Zephyr 1978, 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 feature premium...
      Designed to effectively reduce frictionUltimate load handling capability
      $7.11 - $10.54
    • (0 reviews)
      # mpn2054355
      Mercury Zephyr 1978, 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 retain lubricants and liquids,...
      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
      $10.47
    • (0 reviews)
      # 531125598
      Mercury Zephyr 1978, 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
      $4.21 - $5.55
    • (0 reviews)
      # mpn2371034
      Mercury Zephyr 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 pinion gear nut is...
      Direct replacement for a proper fit every timeDesigned specifically for rear-wheel drive vehicles
      $3.03
    • (0 reviews)
      # mpn2889949607
      Mercury Zephyr 1978, Advantage™ Rear Differential Bearing by ACDelco®. Don’t be “indifferent” toward your differential. It plays a vital role in moving your vehicle and ensuring a smooth ride. Designed utilizing the latest...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $8.15
    • (0 reviews)
      # mpn3065960247
      Mercury Zephyr with 7.5" Ring Gear 1978, Advantage™ Rear Differential Carrier Bearing Race With 1.7812" ID by ACDelco®. Don’t be “indifferent” toward your differential. It plays a vital role in moving your vehicle and ensuring a...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.29
    • (0 reviews)
      # mpn1074426
      Mercury Zephyr with 7.5" Ring Gear with Ford Series Axle 1978, Rear Axle Differential 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
      $7.78
    • (0 reviews)
      # mpn1074425
      Mercury Zephyr with 7.5" Ring Gear with Ford Transmission 1978, Rear 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...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.16
    • (0 reviews)
      # 531053313
      Mercury Zephyr with 7.5" Ring Gear with Ford Series Axle 1978, Rear Differential Pinion 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
      $8.07 - $10.74
    • (0 reviews)
      # 531062043
      Mercury Zephyr with 7.5" Ring Gear with Ford Series Axle 1978, Rear 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...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.34 - $5.68
    • (0 reviews)
      # mpn1179151
      Mercury Zephyr with 7.5" Ring Gear with Ford Transmission 1978, Rear 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...
      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
      $19.44
    • (0 reviews)
      # mpn1307887
      Mercury Zephyr with 7.5" Ring Gear with Ford Series Axle 1978, 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...
      National oil seals are recognized worldwide for their quality and reliable performance for every type of repair.Design Type: Spring Loaded; Multi-Lip
      $9.47
    • (0 reviews)
      # mpn4517170323
      Mercury Zephyr with Ford 7.5" Series Axle with 10 Bolt 1978, 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
      $87.53
    • (0 reviews)
      # mpn4517166286
      Mercury Zephyr with Ford 7.5" Series Axle with 10 Bolt 1978, 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...
      Central contact patternCNC start to finish
      $203.94
    • (0 reviews)
      # 503604462
      Mercury Zephyr with Ford 7.5" Series Axle with 10 Bolt 1978, Rear 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
      $227.48 - $232.42
    • (0 reviews)
      # 1029217582
      Mercury Zephyr with Ford 8" Series Axle with 3.00 and Up Gear Ratio 1978, Pro™ Rear Limited Slip Differential by Auburn Gear®. Location: Rear. Turns your torque up another notch, offering an even higher bias ratio and faster sensing...
      Expertly crafted from superior materialsProvides exceptional reliability
      $488.38
    • (0 reviews)
      # mpn4517169589
      Mercury Zephyr with 28 Spline with Ford 7.5" Series Axle 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...
      Brute Force Devices For Rugged ApplicationsReplacement Of Differential Case Not Required
      $405.19
    • (0 reviews)
      # 503366316
      Mercury Zephyr with Ford 7.5" Series Axle with 10 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....
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $212.41 - $214.67
    • (0 reviews)
      # mpn4517166257
      Mercury Zephyr with 7.5" Series Axle 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...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $31.82
    • (0 reviews)
      # 503673077
      Mercury Zephyr with GM 7.5" Series Axle with 10 Bolt 1978, Rear Differential Bearing Kit by Motive Gear®. Location: Rear. All Motive Gear products are engineered for their specific application and manufactured in state of the art...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $72.50 - $76.32
    • (0 reviews)
      # mpn4517166372
      Mercury Zephyr with 28 Spline with 7.5" Series Axle with 10 Bolt 1978, Rear Differential Carrier Gear Kit by Motive Gear®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $120.22
    • (0 reviews)
      # 503609241
      Mercury Zephyr with GM 7.5" Series Axle with 10 Bolt 1978, Rear Differential Master Bearing Kit by Motive Gear®. Location: Rear. All Motive Gear products are engineered for their specific application and manufactured in state of the art...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $80.43 - $90.29
    • (0 reviews)
      # 503354974
      Mercury Zephyr with GM 7.5" Series Axle with 10 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
      $106.76 - $118.62
    • (0 reviews)
      # mpn4517170054
      Mercury Zephyr with Ford 7.5" Series Axle 1978, Differential Gear Installation Kit by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $30.28
    • (0 reviews)
      # mpn4517166249
      Mercury Zephyr with 7.5" 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
      $2.45
    • (0 reviews)
      # mpn4517167764
      Mercury Zephyr with 7.5" Series Axle with 10 Bolt 1978, Differential Pinion Shaft 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...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $19.20
    • (0 reviews)
      # 503631211
      Mercury Zephyr 1978, Differential Ring Gear Bolt 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
      $2.31 - $11.95
    • (0 reviews)
      # mpn4517168010
      Mercury Zephyr with 28 Spline with Ford 8" Series Axle with 3.00 and Up Gear Ratio 1978, Rear Differential Spring Retainer Service Kit by Auburn Gear®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning...
      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
      $116.04
    • (0 reviews)
      # mpn4517166572
      Mercury Zephyr with Ford 7.5" Series Axle 1978, Differential Bearing Kit by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $139.25
    • (0 reviews)
      # mpn4517166557
      Mercury Zephyr with Ford 7.5" Series Axle 1978, Differential Pinion Shaft by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $41.42
    • (0 reviews)
      # mpn4515297019
      Mercury Zephyr with Ford 8.8" Series Axle 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...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $14.99
    • (0 reviews)
      # mpn4515291619
      Mercury Zephyr with Ford 8.8" 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 better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $4.99
    • (0 reviews)
      # mpn4515293617
      Mercury Zephyr with Ford 8.8" Series Axle 1978, Ring and Pinion Installation Bearing Kit by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $99.99
    • (0 reviews)
      # mpn4517168705
      Mercury Zephyr with Ford 7.5" Series Axle with 10 Bolt 1978, Excel™ Rear Differential Bearing Kit by Richmond®. Location: Rear. Designed utilizing the latest technology, this product by Richmond features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $89.24
    • (0 reviews)
      # mpn4517169144
      Mercury Zephyr with 1.2" Axle Spline Diameter with 28 Spline with Ford 7.5" Series Axle with 10 Bolt 1978, Excel™ Rear Differential Carrier Gear Kit by Richmond®. Location: Rear. Designed utilizing the latest technology, this product...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $117.87
    • (0 reviews)
      # 1029318580
      Mercury Zephyr with Ford 7.5" Series Axle with 10 Bolt 1978, Excel™ Rear Ring and Pinion Gear Set by Richmond®. Location: Rear. Designed utilizing the latest technology, this product by Richmond features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $189.65
    • (0 reviews)
      # mpn4517170067
      Mercury Zephyr with Ford 7.5" 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...
      Save Money: Buying components separately can be costly and cumbersomeSave Downtime: Be ready to perform a repair or overhaul as you need it
      $158.81
    • (0 reviews)
      # mpn4517170066
      Mercury Zephyr with Ford 7.5" Series Axle 1978, Rear Differential Standard Bearing Kit by Spicer®. Location: Rear. Remember - not all bearings are created equal. Choose Spicer axle bearing kits for just the right repair. Each kit comes...
      Highest quality mix of bearings, cups, and cones for performance you can count onPremium oil seals to keep lube in and dust and road grime out
      $135.77
    • (0 reviews)
      # mpn4517169503
      Mercury Zephyr Empty Case Housing with Ford 7.5" Series Axle with 10 Bolt 1978, Excel™ Rear Differential Carrier by Richmond®. Location: Rear. Designed utilizing the latest technology, this product by Richmond features premium quality...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $84.16
    • (0 reviews)
      # 503520490
      Differential Master Installation Kit by Strange®. Designed utilizing the latest technology, this product by Strange features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Perfect for drag racing or high-performance racing applicationsDesigned and manufactured using innovative technologies
      $144.72 - $226.80
    • (0 reviews)
      # 503622062
      Differential Pinion Bearing Kit by Strange®. Designed utilizing the latest technology, this product by Strange features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...
      Perfect for drag racing or high-performance racing applicationsDesigned and manufactured using innovative technologies
      $23.51 - $234.37
    • (0 reviews)
      # 503467248
      Differential Pinion Support by Strange®. Dominate the track or hit the trails with condidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential that delivers the ultimate in high strength...
      Perfect for drag racing or high-performance racing applicationsDesigned and manufactured using innovative technologies
      $146.67 - $346.04
    • (0 reviews)
      # 503442338
      Housing End T-Bolt by 9-Plus®. Designed utilizing the latest technology, this product by 9-Plus features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...
      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
      $1.95 - $162.83
    • (0 reviews)
      # 1029020552
      Differential Pinion Seal by Strange®. Designed utilizing the latest technology, this product by Strange features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet...
      Perfect for drag racing or high-performance racing applicationsDesigned and manufactured using innovative technologies
      $15.20 - $17.24
    • (0 reviews)
      # 976617070
      TorqueWorm™ Limited Slip Differential by Speedmaster®. Designed utilizing the latest technology, this product by Speedmaster features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $334.80 - $495.00
    • (0 reviews)
      # 1029275594
      Differential Master Overhaul Kit by Yukon Gear & Axle®. Yukon Master Overhaul kits give you all the high quality parts you need to start and finish every differential job. Yukon offers more tailor-made kits than any other manufacturer...
      Most complete kits on the marketComplete overhaul package to rebuild differential
      $238.58 - $394.70
    • (0 reviews)
      # 1145944347
      Differential Pinion Depth Shim by Strange®. Designed utilizing the latest technology, this product by Strange features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...
      Perfect for drag racing or high-performance racing applicationsDesigned and manufactured using innovative technologies
      $23.51 - $72.08
    • (0 reviews)
      # 1190471085
      Ultra Case Package by Strange®. Designed utilizing the latest technology, this product by Strange features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1,073.26 - $1,221.27
    • (0 reviews)
      # 1029363529
      Differential Adapter Sleeve by Yukon Gear & Axle®. Designed utilizing the latest technology, this product by Yukon Gear & Axle features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $11.77 - $41.20
    • (0 reviews)
      # 1091318479
      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 street, off-road, or at...
      Smooth finishEasy Set-Up
      $271.48 - $549.26
    • (0 reviews)
      # mpn4525249236
      Mercury Zephyr with 7.5" Ring Gear 1978, Advantage™ Rear Inner Differential Pinion Race by ACDelco®. Don’t be “indifferent” toward your differential. It plays a vital role in moving your vehicle and ensuring a smooth ride....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.95
    • (0 reviews)
      # 1029288710
      Limited Slip Differential by OS Giken®. The OS Super Lock LSD is the culmination of over four years of extensive research and development that led to a revolutionary LSD design with the capacity to house an unprecedented number of...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1,530.00 - $1,650.00


    1978 Mercury Zephyr Models


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