Racing Differentials & Components

Racing Differentials & Components

  • Diversified Machine® - CT-1 Magnesium 6-Rib Bell
    Diversified Machine®CT-1 Magnesium 6-Rib Bell
    0
    # 345324256
    Universal CT-1 Magnesium 6-Rib Bell by Diversified Machine®. DMI's Race Kits are a handy way to purchase the necessary parts to build your racecar. All your favorite DMI components at a great package price – another way DMI has raised...
    Designed to suit your racing needsUnsurpassed reliability and performance
    $426.86 - $579.03
  • PEM® - Lightweight Premium Quick Change Gear Kit
    PEM®Lightweight Premium Quick Change Gear Kit
    0
    # 1480945813
    Lightweight Premium Quick Change Gear Kit by PEM®. 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...
    Built to deliver the performance you crave forManufactured from high-strength materials
    $183.53
  • AllStar Performance® - Spool
    AllStar Performance®Spool
    0
    # 1480603962
    Spool by AllStar Performance®. Replace a troublesome positive traction unit with a high quality Allstar spool. Substantially lighter than conventional carriers, spools deliver equal power to both rear wheels. Ultra-lite steel spools...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $289.99 - $299.99
  • Diversified Machine® - Friction Fighter™ Quick Change Gear Set
    Diversified Machine®Friction Fighter™ Quick Change Gear Set
    0
    # 1480767962
    Friction Fighter™ Quick Change Gear Set by Diversified Machine®. Designed utilizing the latest technology, this product by Diversified Machine 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
    $410.41 - $425.84
  • PEM® - Standard Quick Change Gear Kit
    PEM®Standard Quick Change Gear Kit
    0
    # 1480942817
    Standard Quick Change Gear Kit by PEM®. 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...
    Built to deliver the performance you crave forManufactured from high-strength materials
    $95.55
  • Diversified Machine® - Posi-Lock Retainer
    Diversified Machine®Posi-Lock Retainer
    0
    # 345324398
    Universal Posi-Lock Retainer by Diversified Machine®. DMI's Race Kits are a handy way to purchase the necessary parts to build your racecar. All your favorite DMI components at a great package price – another way DMI has raised the...
    Designed to suit your racing needsUnsurpassed reliability and performance
    $51.62
  • ARB® - Air Locker Switch Bracket
    ARB®Air Locker Switch Bracket
    0
    # 1480912807
    Air Locker Switch Bracket by ARB®. In the toughest terrain, ARB Air Lockers give you the traction you need, precisely when you need it, and all at the flick of a switch. Designed utilizing the latest technology, this product by ARB...
    Provides 100% traction on demand without affecting on road drivability or driveline wearVastly improved traction means less reliance on momentum, which reduces the likelihood of vehicle damage and environmental impact
    $7.84 - $12.77
  • AllStar Performance® - Paper Quick Change Cover Gasket
    AllStar Performance®Paper Quick Change Cover Gasket
    0
    # 1699955416
    Paper Quick Change Cover Gasket by AllStar Performance®. Keep spare gaskets on hand for gear change service. Three types of quick change cover gaskets. This top-grade product is expertly made in compliance with stringent industry...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $2.99 - $29.99
  • AllStar Performance® - Set-Up Plate
    AllStar Performance®Set-Up Plate
    0
    # 1480746964
    Set-Up Plate by AllStar Performance®.
    Precise manufacturing and high-grade materialsExceptional performance at a competitive price
    $124.99 - $169.99
  • Diversified Machine® - CT-1 Steel Lower Shaft
    Diversified Machine®CT-1 Steel Lower Shaft
    0
    # 345324268
    Universal CT-1 Steel Lower Shaft by Diversified Machine®. DMI's Race Kits are a handy way to purchase the necessary parts to build your racecar. All your favorite DMI components at a great package price – another way DMI has raised...
    Designed to suit your racing needsUnsurpassed reliability and performance
    $235.46 - $314.98
  • Diversified Machine® - Front Seal
    Diversified Machine®Front Seal
    0
    # 345324313
    Universal Front Seal by Diversified Machine®. DMI's Race Kits are a handy way to purchase the necessary parts to build your racecar. All your favorite DMI components at a great package price – another way DMI has raised the bar in...
    Designed to suit your racing needsUnsurpassed reliability and performance
    $39.41 - $54.97
  • Diversified Machine® - O-Ring Style Seal
    Diversified Machine®O-Ring Style Seal
    0
    # 345324395
    Universal O-Ring Style Seal by Diversified Machine®. DMI's Race Kits are a handy way to purchase the necessary parts to build your racecar. All your favorite DMI components at a great package price – another way DMI has raised the bar...
    Designed to suit your racing needsUnsurpassed reliability and performance
    $43.05 - $65.00
  • Diversified Machine® - Ring and Pinion Gear Set
    Diversified Machine®Ring and Pinion Gear Set
    0
    # 1572812646
    Ring and Pinion Gear Set by Diversified Machine®. Designed utilizing the latest technology, this product by Diversified Machine 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
    $541.80 - $566.81
  • Racing Power Company® - Differential Cover Bolt Kit
    Racing Power Company®Differential Cover Bolt Kit
    0
    # 1479390765
    Differential Cover Bolt Kit by Racing Power Company®.
    One-of-a-kind style will help customize your autoWill deliver unparalleled levels of durability
    $9.79 - $17.02
  • Richmond® - Street Gear Ring and Pinion Gear Set
    Richmond®Street Gear Ring and Pinion Gear Set
    0
    # 1648109321
    Street Gear Ring and Pinion Gear Set by Richmond®. Richmond Gear ring and pinions are perfect for any vehicle where performance and durability matters. Made from first-run steel, never recycled material, Richmond ring and pinions handle...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $385.99
  • SCE Gaskets® - Rear Quick Change Cover Gasket
    SCE Gaskets®Rear Quick Change Cover Gasket
    0
    # 2574331443
    Rear Quick Change Cover Gasket by SCE Gaskets®. Boost your the defence level of your differential and ring and pinion set from off-road hazzards with this heavy-duty differential cover. It's a perfect way to give your differential...
    Adds sleek, beefy protection against trail damageKeeps the intricate moving parts of your differential safe and sound
    $9.11
  • Wehrli Custom Fabrication® - Rear Differential Cover
    Wehrli Custom Fabrication®Rear Differential Cover
    0
    # 3488861222
    Rear Differential Cover by Wehrli Custom Fabrication®. Boost your the defence level of your differential and ring and pinion set from off-road hazzards with this heavy-duty differential cover. It's a perfect way to give your...
    Adds sleek, beefy protection against trail damageKeeps the intricate moving parts of your differential safe and sound
    $343.38 - $367.63
  • Whiteline® - Differential Mount Bushing
    Whiteline®Differential Mount Bushing
    0
    # 4277331763
    Differential Mount Bushing by Whiteline®. Fix annoying differential movement and noises whilst ensuring appropriate differential pinion angles for maximising power transfer to the wheels with Whiteline. Dominate the track or hit the...
    Precision engineered for your vehicleTested to outperform all comparable products on the market
    $49.88 - $63.88
  • Yukon Gear & Axle® - Ring Gear Bolt
    Yukon Gear & Axle®Ring Gear Bolt
    0
    # 4730105673
    Ring Gear Bolt by Yukon Gear & Axle®. Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much...
    Expertly crafted from premium materialsDesigned to match rigorous quality standards
    $8.89
  • Yukon Gear & Axle® - Ring Gear Bolt Spacer Sleeve
    Yukon Gear & Axle®Ring Gear Bolt Spacer Sleeve
    0
    # 4730658964
    Ring Gear Bolt Spacer Sleeve by Yukon Gear & Axle®. 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 delivers the...
    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
    $8.89 - $9.89
  • Yukon Gear & Axle® - Trac Loc Positraction
    Yukon Gear & Axle®Trac Loc Positraction
    0
    # 2489744846
    Trac Loc Positraction by Yukon Gear & Axle®. Yukon took on this project by looking for ways to make it better. By designing a thicker 1541H billet hat that added more strength, they eliminated the need for clutch guides that tend to...
    Forged case and billet steel left case halfForged 4320 internals for maximum strength
    $668.89 - $749.89
  • aFe® - Street Series™ Differential Cover
    aFe®Street Series™ Differential Cover
    0
    # 4079998653
    Street Series™ Differential Cover by aFe®. Don’t let rocks, dirt and other road hazards spoil your outdoor adventures. Get this aFe differential cover to bring both performance and protection to your vehicle’s axle. This...
    $287.60 - $289.00
  • PEM® - Full Spool
    PEM®Full Spool
    0
    # 1480530958
    Full Spool by PEM®. Designed utilizing the latest technology, this product by PEM features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed stringent...
    High quality at an affordable priceExpertly made from premium materials
    $841.74 - $855.36
  • Prothane® - Differential Bushing Insert Kit
    Prothane®Differential Bushing Insert Kit
    0
    # 1868476242
    Differential Bushing Insert Kit by Prothane®. 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...
    High quality at an affordable priceExpertly made from premium materials
    $10.06 - $52.68
  • Spicer® - Axle Vent Tube
    Spicer®Axle Vent Tube
    0
    # 4117262302
    Axle Vent Tube by Spicer®. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements because they are OE parts, ensuring a perfect fit with company full line of industry-leading axles. That’s why Spicer...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $14.91 - $17.53
  • Spicer® - Differential Cover
    Spicer®Differential Cover
    0
    # 3401671966
    Differential Cover by Spicer®. 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. It will meet your needs and deliver great quality at an...
    High quality at an affordable priceExpertly made from premium materials
    $188.99 - $208.99
  • Spicer® - Differential Cover Fill Plug
    Spicer®Differential Cover Fill Plug
    0
    # 3401639192
    Differential Cover Fill Plug by Spicer®. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements because they are OE parts, ensuring a perfect fit with company full line of industry-leading axles....
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $0.90 - $29.90
  • Spicer® - Differential Lock Motor
    Spicer®Differential Lock Motor
    0
    # 3402208926
    Differential Lock Motor by Spicer®. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements because they are OE parts, ensuring a perfect fit with company full line of industry-leading axles. That’s...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $284.34 - $589.28
  • Spicer® - Differential Lock Piston
    Spicer®Differential Lock Piston
    0
    # 4117661202
    Differential Lock Piston by Spicer®. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements because they are OE parts, ensuring a perfect fit with company full line of industry-leading axles. That’s...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $7.74 - $18.97
  • Spicer® - Differential Lock Spring
    Spicer®Differential Lock Spring
    0
    # 4862588956
    Differential Lock Spring by Spicer®. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements because they are OE parts, ensuring a perfect fit with company full line of industry-leading axles. That’s...
    Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
    $7.03 - $9.69




The simplest form of a typical open differential is a mechanical gear assembly designed to make the drive wheels rotate at different speeds when a four-wheeled vehicle is cornering. The outer wheel travels a longer distance on a wider turning radius, so it needs to rotate faster. Without the differential, the outer wheels would slip making the vehicle much harder to handle and drastically reducing the service life of rubber tires. The construction of the differential is fairly simple. A pinion sits on a driveshaft. It rotates a ring gear that holds two or more spider gears meshed with side gears on drive half shafts.

When the vehicle drives straight, spider gears are balanced, so they rotate side gears along with the ring. During cornering, spider gears start rotating thus splitting the speed of the ring and thus the torque from the engine between two drive shafts making the outer one rotate faster than its inner counterpart. Since engine power in this case mostly goes to the wheel with the least traction, the one getting on a slippery surface may start to rotate fast leaving the other one almost dead. To limit the independence between two drive half shafts, the clutch, cone, or hydraulic locking mechanisms are added to the construction.

Some manufacturers use electronic systems that detect spinning wheels without traction and send signals to partially engage brakes on that wheel to channel the engine’s power to the other wheel on solid ground. A hydraulic differential lock can be temporarily engaged in a difficult off-road situation when one of the drive wheels digs deeper into snow, mud, or sand. By installing a high-performance ring and pinion set with different gear ratio, racing enthusiasts can achieve the needed torque multiplication for faster acceleration on the street, strip, or track. Browse our digital shelves to find a huge assortment of premium racing differentials and related components, such as durable and lightweight differential cases, housings, rings and pinions, spider gears, and much more.

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