1977 Mercury Cougar Differentials

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    • (0 reviews)
      # 68627246
      Mercury Cougar with Ford 9" Series Axle 1977, 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)
      # 199169558
      Mercury Cougar with Ford 9" Series Axle with 10 Bolt 1977, 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
      $193.74 - $245.52
    • (0 reviews)
      # 503349437
      Mercury Cougar with Ford 9" Series Axle with Open Differential 1977, 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...
      Extreme Traction PerformanceEnables a 2 Wheel Drive to outperform a 4 Wheel Drive in poor traction conditions
      $450.54
    • (0 reviews)
      # 503359205
      Mercury Cougar with Ford 9" Series Axle 1977, 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,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $225.36 - $528.06
    • (0 reviews)
      # mpn4517168992
      Mercury Cougar with 3.06" Caps with 31 Spline with Ford 9" Series Axle 1977, 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...
      Comes Fully AssembledCarbon Fiber and Steel Friction Plate Technology
      $389.00
    • (0 reviews)
      # 503572164
      Mercury Cougar with Ford 9" Series Axle with 10 Bolt 1977, Rear Pro 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
      $359.45 - $483.61
    • (0 reviews)
      # 503572498
      Mercury Cougar with Ford 9" Series Axle 1977, 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 Lockers...
      Available for many popular off-road & performance applicationsPatent pending design reduces common failures
      $602.01 - $796.59
    • (0 reviews)
      # mpn4517166994
      Mercury Cougar with 2 Pinion Design / with 4 Pinion Design with 28 Spline / with 31 Spline with Ford 9" Series Axle 1977, Rear Standard Open Carrier Case by Yukon Gear & Axle®. Without Spider Gears. Location: Rear. Dominate the track 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
      $168.71
    • (0 reviews)
      # 503534431
      Mercury Cougar 1977, Rear Differential Master Overhaul Kit by Yukon Gear & Axle®. Location: Rear. Yukon Master Overhaul kits give you all the high quality parts you need to start and finish every differential job. Yukon offers more...
      Most complete kits on the marketComplete overhaul package to rebuild differential
      $196.65 - $382.75
    • (0 reviews)
      # 503522438
      Mercury Cougar with Ford 9" Series Axle 1977, 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 this...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $405.93 - $919.79
    • (0 reviews)
      # 68627209
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear High Performance Ring and Pinion Gear Set by Yukon Gear & Axle®. Location: Rear. Yukon Ring and Pinion sets give you the confidence of...
      Smooth finishEasy Set-Up
      $219.42 - $1,288.56
    • (0 reviews)
      # 503645162
      Mercury Cougar with Ford 9" Series Axle 1977, 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 by...
      Forged case and billet steel left case halfForged 4320 internals for maximum strength
      $547.60
    • (0 reviews)
      # mpn4517168270
      Mercury Cougar with 4 Pinion Gear with Ford 9" Series Axle 1977, 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)
      # 503679448
      Mercury Cougar 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 1977, Rear Lightweight Pro Gear Ring and Pinion Gear Set by Motive Gear®. Location: Rear....
      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)
      # 503451428
      Mercury Cougar with Ford 9" Series Axle with 10 Bolt 1977, 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 - $718.77
    • (0 reviews)
      # 1028889935
      Mercury Cougar 5.0L / 6.6L with Ford 9" Series Axle with 10 Bolt 1977, 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)
      # 503628161
      Mercury Cougar with Ford 9" Series Axle 1977, Grip Pro Traction System by Powertrax®. The Powertrax Grip PRO is a gear driven limited slip differential designed to be among the strongest and most durable in the industry. It combines the...
      Comes Fully AssembledDelivers Progressive and Variable Traction
      $453.13 - $525.00
    • (0 reviews)
      # mpn4517170687
      Mercury Cougar with 28 Spline / with 31 Spline with Ford 8" Series Axle / with Ford 9" Series Axle with Open Differential 1977, Lock Right Locker by Powertrax®. Powertrax Lock-Right performance lockers’ straight-line performance is...
      Brute Force Devices For Rugged ApplicationsReplacement Of Differential Case Not Required
      $301.08
    • (0 reviews)
      # 503463041
      Mercury Cougar with Ford 9" Series Axle 1977, 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 producing up to 550hp. It combines the...
      Comes Fully AssembledTraction Adding Differential Technology
      $515.54 - $563.35
    • (0 reviews)
      # 942613679
      Mercury Cougar Brougham / Villager Ford 9" Axle 1977, Full Spool by Revolution Gear & Axle®.
      Limited Lifetime WarrantyMade to promote and inspire your off-road adventures
      $157.99 - $197.99
    • (0 reviews)
      # 942617614
      Mercury Cougar Brougham / Villager Ford 9" Axle 1977, REM Super Finished Ring and Pinion Gear Set by Revolution Gear & Axle®.
      2 Year Limited WarrantyMade to promote and inspire your off-road adventures
      $265.00
    • (0 reviews)
      # 942611183
      Mercury Cougar Brougham / Villager Ford 9" Axle 1977, Ring and Pinion Gear Set by Revolution Gear & Axle®.
      2 Year Limited WarrantyMade to promote and inspire your off-road adventures
      $210.00
    • (0 reviews)
      # mpn4517170426
      Mercury Cougar with 4 Pinion Design Empty Case Housing with Ford 9" Series Axle 1977, Excel™ Rear Differential Carrier by Richmond®. Location: Rear. Designed utilizing the latest technology, this product by Richmond features premium...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $198.49
    • (0 reviews)
      # 1028916966
      Mercury Cougar with Ford 9" Series Axle 1977, 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 perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $164.95
    • (0 reviews)
      # 503686587
      Mercury Cougar with Ford 9" Series Axle with 10 Bolt 1977, 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...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $214.67 - $447.59
    • (0 reviews)
      # 1091477711
      Mercury Cougar with 31 Spline with Ford 9" Series Axle 1977, Rear Differential Locker by Aussie Locker®. Location: Rear. 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
      $333.02
    • (0 reviews)
      # 1029341585
      Mercury Cougar 1977, Pro Series™ Air Activated Differential Locker by TJM 4x4®. An innovative air locker, the Pro Locker effectively locks "traction-less" wheels and subsequently, the other wheels work harder to get you out. The Pro...
      $940.50
    • (0 reviews)
      # 990395138
      Mercury Cougar with 9" Series Axle with 10 Bolt 1977, Ring and Pinion Gear Set by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $149.99
    • (0 reviews)
      # 503333206
      Mercury Cougar 1977, Rear Differential Bearing Installation Kit by Yukon Gear & Axle®. With Timken Bearings and Races. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking...
      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
      $146.29 - $222.16
    • (0 reviews)
      # mpn4517170032
      Mercury Cougar with 28 Spline / with 31 Spline with Ford 9" Series Axle 1977, Rear Differential Mini Installation Kit by Yukon Gear & Axle®. Location: Rear. Yukon Mini installation kits are a low cost solution for gear changes in newer...
      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
      $33.40
    • (0 reviews)
      # 68627107
      Mercury Cougar 1977, Rear Differential Pinion Installation Kit by Yukon Gear & Axle®. Location: Rear. Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings 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
      $129.05 - $311.70
    • (0 reviews)
      # 503609504
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Differential Pinion Support by Yukon Gear & Axle®. 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
      $99.03 - $438.11
    • (0 reviews)
      # 68627472
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Differential Side Adjuster by Yukon Gear & Axle®. Location: Rear.
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $59.13
    • (0 reviews)
      # 503451113
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Mini Spool by Yukon Gear & Axle®. Location: Rear. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open...
      Provides 100% traction to both wheels at all timesInstalls into standard open carrier case
      $37.48
    • (0 reviews)
      # 68627129
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Spider Gear Set 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 this...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $197.20 - $340.34
    • (0 reviews)
      # 503407203
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Spool 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 this premium...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $209.86 - $301.46
    • (0 reviews)
      # 503545370
      Mercury Cougar 1977, 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
      $84.31 - $150.76
    • (0 reviews)
      # 1029226627
      Mercury Cougar 1977, 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...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $32.45 - $37.61
    • (0 reviews)
      # 503344147
      Mercury Cougar with Ford 9" Series Axle 1977, 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 facilities....
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $103.45 - $119.01
    • (0 reviews)
      # 503558093
      Mercury Cougar with 9" Series Axle with 10 Bolt 1977, Rear Lightweight Spool by Motive Gear®. Location: Rear. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $136.98 - $138.31
    • (0 reviews)
      # 973881922
      Mercury Cougar Brougham / Villager Ford 9" Axle 1977, Differential Master Overhaul Kit by Revolution Gear & Axle®. Designed utilizing the latest technology, this product by Revolution Gear & Axle features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $98.84 - $132.99
    • (0 reviews)
      # 1029031496
      Mercury Cougar 1977, 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 differential gear...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $33.48 - $34.78
    • (0 reviews)
      # 1029328573
      Mercury Cougar with Ford 9" Series Axle 1977, Excel™ Rear Differential Bearing Kit by Richmond®. Location: Rear. Designed utilizing the latest technology, this product by Richmond features premium quality and will perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $70.92 - $99.41
    • (0 reviews)
      # mpn4517171755
      Mercury Cougar 1977, Differential Master Overhaul Kit by Alloy USA®. 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...
      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
      $195.80
    • (0 reviews)
      # 990450767
      Mercury Cougar with Ford 9" Series Axle with 10 Bolt 1977, Mini Spool by AllStar Performance®. Lightweight. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $29.99
    • (0 reviews)
      # 1146010349
      Mercury Cougar with Ford 9" Series Axle 1977, Ring and Pinion Installation Bearing Kit by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $98.99 - $128.99
    • (0 reviews)
      # mpn4515297071
      Mercury Cougar with Ford 8" Series Axle 1977, Ring and Pinion Installation Shim Kit by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $36.99
    • (0 reviews)
      # mpn4515297068
      Mercury Cougar with Ford 9" Series Axle 1977, Ring and Pinion Installation Shim Kit with Crush Sleeve by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $27.99
    • (0 reviews)
      # mpn4515297067
      Mercury Cougar with Ford 9" Series Axle 1977, Ring and Pinion Installation Shim Kit with Solid Spacer by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $37.99
    • (0 reviews)
      # 1016946479
      Mercury Cougar with Ford 9" Series Axle 1977, Spool by AllStar Performance®.
      $137.99 - $204.99
    • (0 reviews)
      # 1017015827
      Mercury Cougar with Ford 9" Series Axle 1977, with Installed Races Differential Pinion Suppport by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $119.99 - $148.99
    • (0 reviews)
      # mpn4517170274
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Clamshell Axle Bearing Puller by Yukon Gear & Axle®. 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
      $353.84
    • (0 reviews)
      # 503398537
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Differential Bearing Race Driver 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...
      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
      $116.74 - $126.07
    • (0 reviews)
      # mpn4517168017
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Differential Bearing Race Punch by Yukon Gear & Axle®. Location: Rear. Dominate the track or hit the trails with confidence by fine...
      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
      $59.80
    • (0 reviews)
      # 503590036
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Differential Carrier Bearing Puller by Yukon Gear & Axle®. Location: Rear. Dominate the track or hit the trails with confidence by fine...
      Works with an impact gun to safely and easliy remove carrrier bearingsEnables you to keep your engine in the powerband for more giddy-up and high speed
      $456.92 - $545.85
    • (0 reviews)
      # 503451352
      Mercury Cougar with 28 Spline / with 31 Spline with Ford 9" Series Axle 1977, Rear Differential Clutch Set by Yukon Gear & Axle®. Location: Rear. Yukon uses higher quality materials and better techniques than OEM to ensure a longer...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $125.69 - $259.86
    • (0 reviews)
      # 68627187
      Mercury Cougar with 28 Spline / with 31 Spline with Ford 9" Series Axle 1977, Rear Differential Cross Pin Shaft by Yukon Gear & Axle®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $10.26 - $137.73
    • (0 reviews)
      # mpn4517168028
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Differential Crush Sleeve by Yukon Gear & Axle®. Location: Rear. Designed utilizing the latest technology, this product by Yukon Gear &...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.49
    • (0 reviews)
      # 503295406
      Mercury Cougar with 28 Spline / with 31 Spline / with 35 Spline with Ford 9" Series Axle 1977, Rear Differential Crush Sleeve Eliminator Kit by Yukon Gear & Axle®. Location: Rear. 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
      $44.10 - $92.86
    • (0 reviews)
      # 503445157
      Mercury Cougar with Ford 9" Series Axle 1977, Rear Differential Pilot Bearing by Yukon Gear & Axle®. Location: Rear. Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts,...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $23.38 - $85.71




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