Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Products

Differential

Shop Street Rod Drivetrain At Speedway Motors

Speedway Motors is the street rodder's source for street rod drivetrain components at everyday low prices! Select from a large assortment of slip yokes and ring & pinions to fit any need. Plus, you can find an assortment of gears to fit your application, all in one stop. Speedway also has a great selection of street rod rear end accessories, too – from gears, axles and slip yokes to bearings and brackets. We can even set you up with a complete Ford 9'' or a quick change rear end!

Featured Products
  • Motive Gear R7.5GR GM 7.5 In 10 Bolt Ring Pinion Install Kit-27 Spline
    Motive Gear R7.5GR GM 7.5 In 10 Bolt Ring Pinion Install Kit-27 Spline
    (Part #919831023)
    x
                Everything you need for a complete ring and pinion installation job. 

    Kit Includes:

    • cover gasket
    • crush sleeve
    • marking compound and brush
    • pinion and carrier bearings
    • pinion nut and washer
    • pinion seal
    • thread locking compound
    • sealer
    • side case and pinion bearings
    • pinion crush sleeve
    • seal and pinion nut
    • Also comes with lock tite and pattern marking compound and gasket.

    Note: Pinion-depth shims are not included. 

  • Halibrand V8 Quick Change Spacer Kit, 3 Pack
    Halibrand V8 Quick Change Spacer Kit, 3 Pack
    (Part #9196821)
    x
                We found a limited supply of these rare Halibrand V8 quick change parts. 

    Click to See Application Chart (Link)

  • NEW Ford 9 Inch Posi Traction Third Member
    NEW Ford 9 Inch Posi Traction Third Member
    (Part #91048445)
    x
                

    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)

  • 78-Up GM 10-Bolt w/7.5 Inch Ring Gear Rear End Differential Axle Cover
    78-Up GM 10-Bolt w/7.5 Inch Ring Gear Rear End Differential Axle Cover
    (Part #5503776)
    x
                

    Add some visual attitude to your rear axle with these chrome differential covers. They're stamped from heavy-gauge steel to ward off those pesky oil leaks, and chrome plated for long lasting good looks.

    GM 10-Bolt 7.5 Inch Rearend Differential Cover

    • Approximately 10-3/4" side to side
    • Approximately 10" up and down
    • It has a squared off oval shape
    • Mounts with 10 bolts

    Fits:

    • Many 1978-Up GM midsize cars
    • 1982-Up Camaro/Firebird
    • S-10/S-15 pickups

     

  • 9 Inch Ford Viton Pinion Seal
    9 Inch Ford Viton Pinion Seal
    (Part #912S18833V)
    x
                

    These Viton 9" Ford rear axle pinion seals are good to over 400° F. Stock rubber seal starts to deteriorate at about 250° F.

  • Motive Gear GT109028 Powertrax Grip Differential, 28 Spline, 9 In Ford
    New
    Motive Gear GT109028 Powertrax Grip Differential, 28 Spline, 9 In Ford
    (Part #910109028)
    x
                
    Powertrax Grip Pro Traction Systems are the latest design in traction using 3 x 2 spiral gear technology for smooth, dependable operation that combines a limited-slip differential with the strength of a fully machined, forged steel case.

    Features:

    • Latest Posi-Trac Design
    • Uses 3 x 2 Spiral Gear Technology
    • Comes Fully Assembled
    • Delivers Progressive & Variable Traction
    • Allows You to Control How Much Traction is Applied
    • Housed in a Fully Machined, Forged Steel Case
    • Fits 28 spline 9" Ford
  • Motive Gear GT109031 Powertrax Grip Differential, 31 Spline 9 In Ford
    Motive Gear GT109031 Powertrax Grip Differential, 31 Spline 9 In Ford
    (Part #910109031)
    x
                

    Powertrax Grip Pro Traction Systems are the latest design in traction using 3 x 2 spiral gear technology for smooth, dependable operation that combines a limited-slip differential with the strength of a fully machined, forged steel case.


    Features:

    • Latest Design
    • Uses 3 x 2 Spiral Gear Technology
    • Comes Fully Assembled
    • Delivers Progressive & Variable Traction
    • Allows You to Control How Much Traction is Applied
    • Housed in a Fully Machined, Forged Steel Case
    • Fits 31 spline 9" Ford
  • Halibrand V8 Quick Change Front Lower Shaft Bearing
    Halibrand V8 Quick Change Front Lower Shaft Bearing
    (Part #912B6206SZZ)
    x
                We found a limited supply of these rare Halibrand V8 quick change parts. 

    Click to See Application Chart (Link)

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  • New 9 Inch Ford Iron Carrier Housing w/3.062 Inch Caps
    New 9 Inch Ford Iron Carrier Housing w/3.062 Inch Caps
    (Part #91048390)
    x
                

    If you have built anything that has serious horsepower you know the weak link can be the stock Ford 9" carrier. The pinion area tends to be weak and if you throw enough power at it, it will break. That won't happen with this brand new housing. 

    This new cast iron housing is built to take street/strip abuse without the fear of breaking. Case has forged caps and extra beef where it's needed. Most stock differentials use the 3.062" o.d. bearings # TLM603049 w/ 1.781" i/d. You should also add a new heavy duty cast iron pinion support while you're at it. 

    • Forged Steel Caps
    • 1/2" Allen head grade 8 bolts
    • Heavy Duty Housing - 36 lbs.
    • Good for 1100 plus horsepower 
  • Halibrand V8 Quick Change Spacer Kit, 3 Pack
    Halibrand V8 Quick Change Spacer Kit, 3 Pack
    (Part #9196821)
    x
                We found a limited supply of these rare Halibrand V8 quick change parts. 

    Click to See Application Chart (Link)

  • OTB Gear 6870 Finned Cover For Round Back 9 Inch Rearend, Polished
    OTB Gear 6870 Finned Cover For Round Back 9 Inch Rearend, Polished
    (Part #91068700)
    x
                The perfect cure for the boring pumpkin. The sturdy and popular Ford 9"  rearend needs a little work to look stylish... at least thats what we  thought. This new cover is cast in A356 aircraft grade alloy and  available in a highly polished finish. No hardware is  needed to attach - we provide a generous supply of high temperature  adhesive (600 degree).
    • Excellent compliment to the new & improved Speedway 9" housing (910-46100)
    • Will fit most factory 9" Ford rear axle housings that have a bulge on the back of the housing for the ring gear, such as our axle # 910-46100 and other similar rear housings
    • No hardware is needed to attach
    • Generous supply of high temperature adhesive (600 degree) included
    • Can be powder coated after assembly
    • Will not fit Currie except, CE2000N made prior to September 2009
    • Will not fit axle housing used in Speedway #s 910-45100 and 715-700
    • Catalog correction, # 338 p# 61 shows the incorrect style of housing that this cover fits

    Instructions (PDF)

     

  • 9 Inch Ford Viton Pinion Seal
    9 Inch Ford Viton Pinion Seal
    (Part #912S18833V)
    x
                

    These Viton 9" Ford rear axle pinion seals are good to over 400° F. Stock rubber seal starts to deteriorate at about 250° F.

  • GM 10 Bolt Ring and Pinion Instal Kit, 8.5 R&P, 30 Spline
    GM 10 Bolt Ring and Pinion Instal Kit, 8.5 R&P, 30 Spline
    (Part #919831021)
    x
                Everything you need for a complete ring and pinion installation job. 

    Kit Includes:

    • cover gasket
    • crush sleeve
    • marking compound and brush
    • pinion and carrier bearings
    • pinion nut and washer
    • pinion seal
    • thread locking compound
    • sealer

    Note: Pinion-depth shims are not included. 

  • Winters Performance POSTER-10 10-Spline Quick Change Gear Chart
    Winters Performance POSTER-10 10-Spline Quick Change Gear Chart
    (Part #8021000)
    x
                Perfect for trailers or the race shop!  19" x 25"  Laminated.
            
  • Motive Gear GT109028 Powertrax Grip Differential, 28 Spline, 9 In Ford
    New
    Motive Gear GT109028 Powertrax Grip Differential, 28 Spline, 9 In Ford
    (Part #910109028)
    x
                
    Powertrax Grip Pro Traction Systems are the latest design in traction using 3 x 2 spiral gear technology for smooth, dependable operation that combines a limited-slip differential with the strength of a fully machined, forged steel case.

    Features:

    • Latest Posi-Trac Design
    • Uses 3 x 2 Spiral Gear Technology
    • Comes Fully Assembled
    • Delivers Progressive & Variable Traction
    • Allows You to Control How Much Traction is Applied
    • Housed in a Fully Machined, Forged Steel Case
    • Fits 28 spline 9" Ford
  • Halibrand Ring and Pinion Gears, Loaded w/ Bearings, 3.78 Gear Ratio
    Halibrand Ring and Pinion Gears, Loaded w/ Bearings, 3.78 Gear Ratio
    (Part #91998378)
    x
                

    Highest quality replacement gear set made. Fits all 6-spline Halibrand V8 quick changes.

  • 9 Inch Ford Ring & Pinion, 4.56 Gear Ratio
    $164.99
    $169.99
    Product Rating: 4.00 Stars
    9 Inch Ford Ring & Pinion, 4.56 Gear Ratio
    (Part #91919457)
    x
                This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. 

    Other ratios from 4.78 thru 7.33 available in our Lightened Gear series. (Part numbers 91919-478, 91919-525, 91919-614, 91919-666, 91919-683, 91919-700, 91919-716, 91919-733).

    Note:  Circle track racing applications require a minimum of 4 qts. of rear end lube.  Using less than this amount will lead to immediate pinion bearing failure.

    Instructions (PDF)

  • 9 Inch Ford Ring & Pinion, 6.33 Gear Ratio
    $159.99
    $169.99
    9 Inch Ford Ring & Pinion, 6.33 Gear Ratio
    (Part #91919633)
    x
                This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. 

    Other ratios from 4.78 thru 7.33 available in our Lightened Gear series. (Part numbers 91919-478, 91919-525, 91919-614, 91919-666, 91919-683, 91919-700, 91919-716, 91919-733).

    Note:  Circle track racing applications require a minimum of 4 qts. of rear end lube.  Using less than this amount will lead to immediate pinion bearing failure.

    Instructions (PDF)

  • Ford 8 Inch Ring and Pinion Gears
    Ford 8 Inch Ring and Pinion Gears
    (Part #91908)
    x
                "Pro" brand gears offer excellent quality at a great price!  We offer a terrific selection of ratios for your 8" Ford rear axle.
            
  • Long Rear Axle Bracket
    $12.99
    Product Rating: 5.00 Stars
    Long Rear Axle Bracket
    (Part #91645011)
    x
                

    "Long" rear axle bracket for use with custom radius rod rear suspensions. 

    • Fits 3" diameter rear axle tube
    • 3/8" thick steel
    • 3/8" diameter holes
  • Halibrand V8 Quick Change Rear Cover Plate Bearing
    Halibrand V8 Quick Change Rear Cover Plate Bearing
    (Part #912B6304)
    x
                We found a limited supply of these rare Halibrand V8 quick change parts. 

    Click to See Application Chart (Link)

  • 9 Inch Ford Ring & Pinion, 5.14 Gear Ratio
    $159.99
    $169.99
    9 Inch Ford Ring & Pinion, 5.14 Gear Ratio
    (Part #91919514)
    x
                This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. 

    Other ratios from 4.78 thru 7.33 available in our Lightened Gear series. (Part numbers 91919-478, 91919-525, 91919-614, 91919-666, 91919-683, 91919-700, 91919-716, 91919-733).

    Note:  Circle track racing applications require a minimum of 4 qts. of rear end lube.  Using less than this amount will lead to immediate pinion bearing failure.

    Instructions (PDF)

  • 9 Inch Ford Ring & Pinion, 4.86 Gear Ratio
    $159.99
    $169.99
    9 Inch Ford Ring & Pinion, 4.86 Gear Ratio
    (Part #91919486)
    x
                This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. 

    Other ratios from 4.78 thru 7.33 available in our Lightened Gear series. (Part numbers 91919-478, 91919-525, 91919-614, 91919-666, 91919-683, 91919-700, 91919-716, 91919-733).

    Note:  Circle track racing applications require a minimum of 4 qts. of rear end lube.  Using less than this amount will lead to immediate pinion bearing failure.

    Instructions (PDF)

  • Housing Studs, 9 Inch Carrier
    Housing Studs, 9 Inch Carrier
    (Part #9190915)
    x
                Housing studs and ring gear bolts complete the package for your racing or street use 9" Ford axle. 

    Side bell thru bolts torque to 40-45 lbs.

  • 9 Inch Ford Ring & Pinion, 3.50 Gear Ratio
    9 Inch Ford Ring & Pinion, 3.50 Gear Ratio
    (Part #91919350)
    x
                This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. 

    Other ratios from 4.78 thru 7.33 available in our Lightened Gear series. (Part numbers 91919-478, 91919-525, 91919-614, 91919-666, 91919-683, 91919-700, 91919-716, 91919-733).

    Note:  Circle track racing applications require a minimum of 4 qts. of rear end lube.  Using less than this amount will lead to immediate pinion bearing failure.

    Instructions (PDF)

  • New Ford 9 Inch Aluminum Carrier Housing w/3.062 Inch Caps
    New Ford 9 Inch Aluminum Carrier Housing w/3.062 Inch Caps
    (Part #91048393)
    x
                

    This brand new carrier housing is built to take street/strip abuse without the fear of breaking. Our aluminum housing has forged caps and extra beef where it's needed. Most stock differentials use the 3.062" o.d. bearings # TLM603049 w/ 1.781" i/d.

    The aluminum case will save you 20 lbs. over the cast iron version. You should also add a new heavy duty aluminum pinion support while you're at it. 

    Carrier caps torque to 95 ft lbs.

  • 1928-48 Ford Quick Change Look Rear End Cover, Polished
    1928-48 Ford Quick Change Look Rear End Cover, Polished
    (Part #91647902)
    x
                

    The great look of a quick change rearend at a fraction of the price! Contoured to fit an early Ford "banjo" axle housing.

    916-47902 Instructions (PDF)

  • 9 Inch Ford Teflon Low-Drag Pinion Seal
    9 Inch Ford Teflon Low-Drag Pinion Seal
    (Part #912S18833T)
    x
                

    These Teflon 9" Ford rear axle pinion seals are good to over 400° F. Stock rubber seal starts to deteriorate at about 250° F.

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