Ford 9 in. 4in. 40 Spline Spool HD Pro Third Member Assembly

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MPN: 1-215-014 UPC: 840136568483
Available Extended Warranty Eligible
US $1,800.00

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Available: 1


Speedmaster Ford 9 in. third member assemblies are designed to help you get that horsepower to the ground. They include aluminumn thru-bolt design center section, as well as our Speedmaster TDS lightweight spool, 1350 series yoke, daytona pinion support, and gear ratio. Whether you're assembling a daily driver, street rod, or race car, Speedamster's third member assemblies will provide the durability that your vehicle deserves.


Part Number:1-215-014
Part Type:Third Member Complete Assembly
Product Line:Long-Nose Case
Case Style:Ford 9"
Case Material:Aluminum
Main Cap Material:Aluminum
Main Cap Retention Style:Bolt
Carrier Bearing Diameter (in):4.000 in.
Pinion Support Bolt Quantity:10
Standard Pinion Location:Yes
Ring Gear Load Bolt:No
Ring and Pinion Included:Yes
Ring and Pinion Ratio:All Ratios Available
Yoke Included:Yes
Yoke Style:1350 Series
Bearings Included:Yes
Carrier Type:Full Spool
Quantity:Sold individually.
Notes:Select desired gear ratio.
CalculatorGear Ratio Calculator


HD vs HD Pro

CASE: Our aluminium cases are made from A356-T6 aluminium, our bearing caps are one-piece billet, with a through bolt design and extra material is added to the bearing caps. These cases are offered in 3.250" bearing diameter to accommodate 28, 31 and 35-spline carriers and spools. These extras truly make this Aluminium case the ultimate Ford 9" case, rated to 850 horsepower. All our aluminium third members come with 12 point through bolts and a billet pinion support, which gives us an advantage over our competition.


The lightweight SPOOL gives you the traction you need by locking the axle shafts together, forcing your rear tires to turn at the same speed. They"re CNC-machined from forged chromoly steel to provide a more rigid ring gear mounting. This eliminates gear failure caused by case deflection or differential side-gear failure.


The GEARSETS used are HI-PERFORMANCE 8620 Chrome-Nickel-Moly Steel. CNC machined from high-quality forgings to our exacting specifications and then heat-treated to obtain high impact and durability. Then lapped to allow for correct tooth contact and smoothness and for use in the performance market. The 8620 Gearset has proven itself in all forms of motorsport over the past 30 years.


YOKE: Speedmaster TDS Billet yokes are a long style unit fully CNC machined to our specifications.


ASSEMBLY: Assembly has been carried out by the Speedmasterª TDS differential team. Quality is assured with 40 years of experience in the Differential Industry and full involvement in all forms of motorsport from V8 SUPERCAR To Group 1 Drag Racing. Our Technicians are on hand to discuss your differential requirements, questions, and upgrades.


NOTE: These 3rd members are to be used with a mineral-based oil of a range of EP140 Extreme pressure at a minimum, NO split grades eg. 85/140 (These are not recommended), failure to use the correct oil can result in gear damage, noise and may void your warranty.

Prop 65 Warning

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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