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  • Richmond Gear 92-0690-2800 Powertrax Ford 9 Inch Locking Differential
    Richmond Gear 92-0690-2800 Powertrax Ford 9 Inch Locking Differential
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    The Powertrax Traction System is the latest design in traction adding differential technology. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. An ultra-strength alloy material is used throughout, which is 67% stronger than titanium.

    Installation is simple because no ring and pinion set-up is required. In addition, no special tools or oils are needed (installs in about one hour). Step by step model specific instructions are provided with every kit.

    • Positive traction - full locker
      • Delivers engine power to both wheels when coming off the line
      • Upgrade and improve your times and your vehicles reputation 
    • Smooth quiet operation - fully automatic
    • Do-it-yourself - installs in about one hour
    • No special tools required
    • Works for both cars and trucks
    • Gives 2-wheel drive trucks the traction power of 4x4's
    • Excellent replacement for Trac loc style lockers
  • Ford 9 Inch Posi Traction Third Member Assembly
    Ford 9 Inch Posi Traction Third Member Assembly
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    Speedway Motors now offers you a 9" Ford street 3rd member for your street rod. We reclaim genuine Ford 9" housings, clean, inspect and install all new components. All bearings, seals, 1310 series yoke and ring & pinion are new!

    These Ford 9" 3rd member assemblies feature new Pro Gears ring & pinion, choice of 3.50, 3.70, 3.89, 4.11 or 4.56, Currie 9-Plus limited slip differential, 28 or 31 spline. Shipped in handy plastic carrying case. Assembled by professionals.

     

    Currie Differential Tech Bulletin (PDF)

     

    910-48345 Instructions (PDF)

  • Book/Manual - High-Performance Differentials, Axles & Drivelines
    Book/Manual - High-Performance Differentials, Axles & Drivelines
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                All too often, when an enthusiast builds a  high-performance engine, swaps a more powerful engine into a car, or  mounts sticky tires, the driveline components simply can't handle the  added torque and fail. In addition, differential, axles, and driveline  parts have a limited life span under the power of a high-performance  engine. Also, the proper gear ratios need to be selected and installed  for maximum performance on the street, strip, or track. The performance  of the driveshaft, differential, axle, and other driveline components  needs to match the performance level of a particular engine, so maximum  efficiency, longevity, and reliability can be realized.

    This book covers everything you need to know about selecting the most desirable gear ratio, rebuilding differentials and other driveline components, and most importantly, matching the correct driveline components to engine power output. Learn how to set up a limited-slip differential, install high-performance axle shafts, swap out differential gears, and select the best available products for the driveline. This book covers the Chevy 12-bolt, Ford 8.8-inch, Dana units, and many other popular high-performance axles and rear ends. In addition, it explains rear differential basics, rear differential housings, rebuilding open rear differentials, limited-slip differentials, and factory differentials. Ring and pinion gears, axle housings, axle shafts, driveshafts, and U-joints are also cove
  • NEW Ford 9 Inch Posi Traction Third Member
    NEW Ford 9 Inch Posi Traction Third Member
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    Our completely NEW 9" Ford third members start with a heavy duty cast iron carrier featuring the larger, cast iron Daytona pinion support. Then we use a Currie 9+ limited slip differential in your choice of 28 or 31 spline and a 3.50, 3.70, 3.89, 4.11, or 4.56 gear ratio ring & pinion. Also includes NEW bearings and seals. Shipped ready for use in a plastic case.


    Currie Differential Tech Bulletin (PDF)

  • Richmond Gear 92-0690-3100 Powertrax Ford 9 Inch Locking Differential
    Richmond Gear 92-0690-3100 Powertrax Ford 9 Inch Locking Differential
    x
                

    The Powertrax Traction System is the latest design in traction adding differential technology. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. An ultra-strength alloy material is used throughout, which is 67% stronger than titanium.

    Installation is simple because no ring and pinion set-up is required. In addition, no special tools or oils are needed (installs in about one hour). Step by step model specific instructions are provided with every kit.

    • Positive traction - full locker
      • Delivers engine power to both wheels when coming off the line
      • Upgrade and improve your times and your vehicles reputation 
    • Smooth quiet operation - fully automatic
    • Do-it-yourself - installs in about one hour
    • No special tools required
    • Works for both cars and trucks
    • Gives 2-wheel drive trucks the traction power of 4x4's
    • Excellent replacement for Trac loc style lockers
  • Richmond Gear 92-0680-2800 Powertrax Ford 8 Inch Locking Differential
    Richmond Gear 92-0680-2800 Powertrax Ford 8 Inch Locking Differential
    x
                

    The Powertrax Traction System is the latest design in traction adding differential technology. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. An ultra-strength alloy material is used throughout, which is 67% stronger than titanium.

    Installation is simple because no ring and pinion set-up is required. In addition, no special tools or oils are needed (installs in about one hour). Step by step model specific instructions are provided with every kit.

    • Positive traction - full locker
      • Delivers engine power to both wheels when coming off the line
      • Upgrade and improve your times and your vehicles reputation
    • Smooth quiet operation - fully automatic
    • Do-it-yourself - installs in about one hour
    • No special tools required
    • Works for both cars and trucks
    • Gives 2-wheel drive trucks the traction power of 4x4's
    • Excellent replacement for Trac loc style lockers
  • Richmond Gear 92-0688-3108 Powertrax Ford 8.8 In. Locking Differential
    Richmond Gear 92-0688-3108 Powertrax Ford 8.8 In. Locking Differential
    x
                

    The Powertrax Traction System is the latest design in traction adding differential technology. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. An ultra-strength alloy material is used throughout, which is 67% stronger than titanium.

    Installation is simple because no ring and pinion set-up is required. In addition, no special tools or oils are needed (installs in about one hour). Step by step model specific instructions are provided with every kit.

    • Positive traction - full locker
      • Delivers engine power to both wheels when coming off the line
      • Upgrade and improve your times and your vehicles reputation 
    • Smooth quiet operation - fully automatic
    • Do-it-yourself - installs in about one hour
    • No special tools required
    • Works for both cars and trucks
    • Gives 2-wheel drive trucks the traction power of 4x4's
    • Excellent replacement for Trac loc style lockers
  • Richmond 92-0775-2605 Powertrax GM 7.5 10-Bolt Locking Differential
    Richmond 92-0775-2605 Powertrax GM 7.5 10-Bolt Locking Differential
    x
                

    The 7.5 inch Powertrax Traction System is the latest design in traction adding differential technology. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring design reduce the backlash and therefore driveline windup. An ultra-strength alloy material is used throughout, which is 67% stronger than titanium.

    Installation is simple because no ring and pinion set-up is required. In addition, no special tools or oils are needed (installs in about one hour). Step by step model specific instructions are provided with every kit.

    • Positive traction - full locker
      • Delivers engine power to both wheels when coming off the line
      • Upgrade and improve your times and your vehicles reputation 
    • Smooth quiet operation - fully automatic
    • 7.5 Inch Powertrax Unit
    • Do-it-yourself - installs in about one hour
    • No special tools required
    • Works for both cars and trucks
    • Gives 2-wheel drive trucks the traction power of 4x4's
    • Excellent replacement for Posi trac style lockers
  • Currie 9+-94088 31 Spline Axle 9-Plus Torque Sensitive Differential
    Currie 9+-94088 31 Spline Axle 9-Plus Torque Sensitive Differential
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    The Currie 9-Plus differential is essentially a reproduction of the original four spider limited slip that Ford used in their 9" rearends. Uses 1.780" i.d. carrier bearings. Use with new bolts and lube additive listed below

    • For light to medium weight street rod applications .
    • Not recommended for drag racing

    Currie Tech Bulletin (PDF)

  • Currie 9+-94086 28 Spline Axle 9-Plus Torque Sensitive Differential
    Currie 9+-94086 28 Spline Axle 9-Plus Torque Sensitive Differential
    x
                

    The Currie 9-Plus differential is essentially a reproduction of the original four spider limited slip that Ford used in their 9" rearends. Uses 1.780" i.d. carrier bearings. Use with new bolts and lube additive listed below

    • For light to medium weight street rod applications .
    • Not recommended for drag racing

    Currie Tech Bulletin (PDF)

  • Currie 9+-99011 Posi-Traction Lube Additive, 4 oz.
    Currie 9+-99011 Posi-Traction Lube Additive, 4 oz.
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    Currie 9-Plus posi-traction lube additive for Currie differentials. For use in Trac-Lock, limited slip, and posi traction rearends

    • Reduces hypoid gear noise and clutch chatter
    • Promotes smoother, quieter operation
    • Extends clutch life
    • Add to 9-Plus Racing Gear Oil
    • 4 ounce bottle
  • Garage Sale - Powertrax No-Slip GM 8.2' Traction System
    Garage Sale
    Garage Sale - Powertrax No-Slip GM 8.2' Traction System
    x
                

    These Powertrax no-slip traction systems are the latest design in traction-adding differential technology. They combine the smooth operation of a limited-slip differential with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring designs reduce the backlash and, therefore, the driveline windup. Installation is simple because no ring and pinion setup is required. In addition, no special tools or oils are needed. Step-by-step, model-specific instructions are provided with every kit.

     

    This is garage sale priced because it has been installed. 

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

  • Garage Sale - Powertrax GM 7.5 Inch 10 Bolt Locking Differential
    Garage Sale
    Garage Sale - Powertrax GM 7.5 Inch 10 Bolt Locking Differential
    x
                Please view the product's page for more information
            
  • Garage Sale - Ford 9 Inch Posi Traction Third Member Assembly, 28 Spline, 389 Gears
    Garage Sale
    Garage Sale - Ford 9 Inch Posi Traction Third Member Assembly, 28 Spline, 389 Gears
    x
                Please view the product's page for more information
            
  • Garage Sale - Powertrax Ford 9 Inch Locking Differential, 31-Tooth, 1957-Up Open Drive
    Garage Sale
    Garage Sale - Powertrax Ford 9 Inch Locking Differential, 31-Tooth, 1957-Up Open Drive
    x
                Please view the product's page for more information
            
  • Garage Sale - Powertrax No-Slip GM 8.2" Traction System
    Garage Sale
    Garage Sale - Powertrax No-Slip GM 8.2" Traction System
    x
                

    These Powertrax no-slip traction systems are the latest design in traction-adding differential technology. They combine the smooth operation of a limited-slip differential with the traction performance of a locking differential. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. Special gear and spring designs reduce the backlash and, therefore, the driveline windup. Installation is simple because no ring and pinion setup is required. In addition, no special tools or oils are needed. Step-by-step, model-specific instructions are provided with every kit.

     

    Clearance!

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

  • Garage Sale - Phantom Grip Limited Slip Differential Race Springs
    Garage Sale
    Garage Sale - Phantom Grip Limited Slip Differential Race Springs
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    Upgrade your Phantom Grip basic gold series kit to handle more power. The spring upgrade kit will take the base kit from 350ftlbs torque- 350 hp- to 650 ftlbs torque, 650 hp. The X-treme series kit/heavy duty springs, does not come with an upgrade option.  It should hold you on up to just over 1000 ft lbs torque, 1000 hp.

     

    This is garage sale priced because it has been discontinued.

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS   

  • Garage Sale - Ford 9 Inch Posi Traction Third Member Assembly
    Garage Sale
    Garage Sale - Ford 9 Inch Posi Traction Third Member Assembly
    x
                Please view the product's page for more information