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31-Spline S/S Custom Street Axles
InfoVehicle Info Needed
STRANGE ENGINEERINGPART NUMBER: 873-A3100

31-Spline S/S Custom Street Axles

$45522
ShippingShips on 09/09/2026
Lowest PriceLowest Price Guarantee

S/S Axles
    31-Spline S/S Custom Axles
  • Special Order Item
  • Please Use The Custom Axle Order Form, See Below

    Strange S/S axles are designed to meet the demanding bending loads of street use. Strange S/S axles are manufactured by Strange from modified 1550 steel. After extensive research and testing, Strange's R&D department determined that 1550 steel in conjunction with specified percentages of additional elements created the bases for the strongest induction hardened axles available. Each S/S street axle is induction hardened to its optimal hardness with Strange custom-designed tooling. S/S splines are hobbed to the proper involute spline form- before heat treatment. The S/S's giant 1.5635" axle bearing diameter and bearing shoulder radius are precisely machined to accept a special radius ring, which minimizes stress concentrations in the bearing area. Strange provides a billet aluminum brake register to properly locate the center of your disc/drum brake system. Strange Ford 9" 31-spline axles are 38% stronger than stock OEM 28-spline axles and are a perfect upgrade for street performance applications.

    >>Click here for Custom Axle Order Form<<
    The ordering process is simple. Just print out the custom axle order form and fill it out with your specs. Once the order form is completely filled out, email it to [email protected].

>>Click Here For Custom Axle Order Form<<

The ordering process is simple. Just print out the custom axle order form and fill it out with your specs. Once the order form is completely filled out, you can either mail, fax or email us with your information and then we'll take it from there. Our fax and phone numbers along with mailing information are on the order form.

Strange Engineering prides itself on supplying the best product for your application. Therefore, when manufacturing axles it is necessary to manufacture two types of axles; induction hardened S/S & S/T Series Axles and thru-hardened Pro Race Axles. Every Strange axle is manufactured by Strange Engineering from superior grade forgings. S/S & S/T axles are produced from 1550 steel that has been modified to Strange Engineering specifications. Pro Race Axles are made from Hy-Tuf, which is a high nickel Ultra-Strength steel. S/S, S/T and Pro Race axles are all NHRA & IHRA accepted.

S/S Axles

Strange S/S axles are designed to meet the demanding bending loads of street use. Strange S/S axles are manufactured by Strange from modified 1550 steel. After extensive research and testing, Strange's R&D department determined that 1550 steel in conjunction with specified percentages of additional elements created the bases for the strongest induction hardened axles available. Each S/S street axle is induction hardened to its optimal hardness with Strange designed tooling. S/S splines are hobbed to the proper involute spline form- before heat treatment. The S/S's giant 1.5635" axle bearing diameter and bearing shoulder radius is precisely machined to accept a special radius ring, which minimizes stress concentrations in the bearing area. Strange provides a billet aluminum brake register to properly locate the center of your disc/drum brake system. Strange does manufacture Ford 9" 28-spline axles (that are stronger than OEM) for low horsepower and lightweight street-rod applications. However, 28-spline S/S axle shafts are significantly (38%) torsionally weaker in comparison to 31-spline S/S axles. So we strongly recommend you upgrade to 31-spline axle shafts for street applications.

S/S Axles are available for 9" 31-spline, as well as limited applications for 9" 28-spline, 9" 33-spline, Mopar 8.75" 30-spline, GM 30 & 33-spline. 5/8" wheel studs available at an additional cost.

S/T Axles

Strange S/T Series 35-spline axles are designed to meet the rigorous loads of street and strip use. S/T Series axles are identical to S/S axles in everyway except for the massive 1.50" (35-spline) shaft diameter. S/T axles carry a Strange Engineering three year replacement guarantee against spline breakage.

S/T Axles are available for 9" 35-spline (must use 3.250" carrier) as well as limited applications for Dana 60 and Mopar 8.75". 5/8" wheel studs available at an additional cost.

Pro Race Axles

Designed for drag race applications

  • Involuted splines for increased strength
  • Forged from Hy-Tuf for optimal grain structure
  • Thru-hardened for superior torsional strength
  • NHRA & IHRA contingency programs available
  • Five year replacement guarantee for 33- & 35-spline axles
  • 5/8" wheel studs available at an additional cost

Strange Pro Race axles are forged from Hy-Tuf alloy steel that was originally developed for highly stressed landing gear in military aircraft. Hy-Tuf was originated in the class of Ultra-Strength alloys. The Hy-Tuf forging is a low carbon, high manganese, high-nickel and high molybdenum steel. Strange Pro racing axles are thru-hardened, which allows for a drag racing shaft with an exceptionally high tensile strength (240,000 PSI) while retaining ductility.

>>Click Here For Custom Axle Order Form<<

The ordering process is simple. Just print out the custom axle order form and fill it out with your specs. Once the order form is completely filled out, you can either mail, fax or email us with your information and then we'll take it from there. Our fax and phone numbers along with mailing information are on the order form.

Part TypeAxle Shaft
Product LineStrange Engineering Custom Axles
BrandSTRANGE ENGINEERING
Package Height10.0
Package Width12.0
Package Length37.5
Weight30.2 PG
Part CategoryPerformance Parts
Wheel Studs IncludedNo
Wheel Stud TypeThread-in
QuantitySold as a pair
Seals IncludedNo
Bearings IncludedNo
Part FitmentSemi Universal
Inner Axle Splines30 or 31
Spool IncludedNo
Axle Material1550 steel
Vendor Part NumberA3100
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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