Product Summary

Ford Stock Spindle Style, 47" King Pin Centers, Drilled

  • Beautiful chrome plated, drilled 4" drop I-Beam axle will enhance the look of your street rod
  • Measures 47" kingpin center to center, spring perch center to center is 39" and accepts a 29" wide cross spring
  • Accepts stock '37-'48 Ford spindles or our early Ford spindles, pt# 91032105 in chrome finish to match
  • 2-1/4" tall wishbone boss fits stock Model A and '37-later Ford wishbones, modification to wishbone boss needed to fit 2" '32-'36 Ford wishbones
  • 1-piece forged steel design adds strength and axle forging is ground smooth and bead blasted before chrome plating for a superior finish

Key Specs

MFG. Part #91035143
BrandSpeedway Motors
Straight Axle StyleDrilled I-Beam
Dropped AxleYes

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Garage Sale Product

This is Garage Sale priced because they are not drilled perfectly centered. The left to right dimensions between the king pin and perch holes are within specification. The misalignment occurs in relationship between the king pin holes and perch holes front to back, the misalignment is ~ .200" max. It is also has possible burr in the king pin bore which may need to be reamed (950-8012) and possilbe rough polished.


These forged steel drop axles are perfect for your next street rod project! Our dropped front axle sizes keep the wheels inside the fenders. Keeping the wheels tucked in the fenders allows for a lower ride height with adequate tire clearance. All of our I-beam axles feature a 4 inch drop and are designed as a replacement Ford front axle. With a versatile design, these dropped axles also allow you to use your stock 1937-48 Ford spindles or our Ford I-beam reproduction spindles. 47" wide from king pin centers, our street rod axles are sized according to original mounting specs, making a stress free conversion for your classic Ford styled front end.

  • 1-piece forged steel design
  • Drilled style with chrome finish
  • Axle forging is ground smooth and bead blasted for a superior finish
  • 4" drop
  • 47" wide (king pin centers)
  • Accepts stock '37-'48 Ford spindles or Speedway Ford-style reproduction spindles
  • 34" spring perch centers
  • Use with 29" cross spring
  • 2-1/4" tall wishbone boss

Note: In order to use this axle with 2 inch wishbones, you will need to machine the inside of your wishbones and/or the axle for them to work together. The spring perch bosses on stock Model A wishbones are 2-1/4 inches, as are '37-and-later Fords, but '32-36 Ford wishbones come in at 2 inches.


MFG. Part #91035143
BrandSpeedway Motors
Straight Axle StyleDrilled I-Beam
Dropped AxleYes
Spindle StyleFord Stock
King Pin Centers47"
Suspension Height Adjustment4 Inch Lowered
Material TypeSteel
Perch Centers34.00"
Sold in QuantityEach