Product Summary

Universal Fit, Straight Axle Front Suspension Type

  • Will fit '28-'31 Model A and '32-'34 Ford frames
  • All hardware included
  • 48" kingpin-to-kingpin tube axle
  • Forged steel perch bolts and lower shock mounts
  • Spring shackles with nylon bushings

Comes as a Kit

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Key Specs

MFG. Part #91639505
Front Suspension TypeStraight Axle
Suspension Height Adjustment3 Inch Lowered
Control Arm StyleRadius Rod
Shock TypeNot Included
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Speedway Motors 91639505 Details

Speedways Radius Rod Tube axle kits are designed to fit '28-'31 Model A and '32-'34 Ford frames. These tube axles require '37-'48 Ford passenger car spindles

Each kit includes:

  • 48" kingpin-to-kingpin tube axle, 3" dropped
  • 27" hairpin radius rods
  • Forged steel perch bolts
  • Forged steel lower shock mounts (key-slotted design)
  • Spring shackles w/ nylon bushings
  • 31-1/4" eye-to-eye 6-leaf Super Glide spring, 1-3/4" wide
  • All hardware for assembly

Leaf Springs-

Achieve a smoother, more comfortable ride with Speedway Super Glide™ springs for your 1928-1934 Ford front end! The ends of the spring leaves of a Super Glide™ spring have a unique nylon button which works as a dry lubricant to significantly reduce leaf-to-leaf friction. This allows the spring to move more easily, thereby giving a softer, quieter ride.

  • Quality tempered steel
  • Reverse eyes for a 1" drop compared to standard eye spring
  • Bare steel finish
  • Spring Width: 1-3/4"
  • Spring Mount Centerline: 36-3/8"
  • Free Arch: 4-3/4"
  • Drop: 1"

Radius Rod Mounting Bracket-

 

Weld these brackets to the underside of your low-ridin' 'T' thru 1934 Ford frame rails for a simple, strong place to attach 4-bars or radius rods. Plain steel.

NOTE: For use with spherical rod ends.

Spring Perches-

Works with 1928-34 Ford front ends with 1-3/4" wide cross spring. Extra-long for lower shock mounts. Includes nylock nut.

  • Built to strict tolerances, to ensure a tight fit
  • Forged 4140 steel construction
  • 2-1/2" from top of threads to mid-shoulder
  • 2-7/8" from top of threads to top of shoulder
  • Thread length is 1-7/8"
  • 5/8" fine thread
  • Distance from the top of the shoulder to the bottom of the threads is 4-3/4"
  • These are cut with a 1/8th inch keyway slot, but the key stock is not included.  This can be purchased at almost any hardware/home improvement stores.

Radius Rods-

These front radius rods are ideal for smaller or full-fendered cars. Rugged, 7/8" O.D. steel tubing is threaded 5/8"-18 NF right hand at each end.

 

Designed to be used with batwings or axle brackets with a 5" center to center bolt hole spacing on front tube or I-beam axles only. Not to be used for rear suspensions. Before installing the heim joints or clevis ends, the actual measurement will be center to center 4-1/2". The angle of the tube will increase the measurement to 5" after installing the end hardware.

Axle Brackets-

Steel bracket attaches to axle with perch bolt. Plain steel finish.

  • Bracket plate width is 3/8"
  • Accepts a clevis with a 3/8" slot and a 3/8" hole
  • Fits 2-1/4" boss or 2" with spacer kit
  • 5" from center-to-center for the radius rods

Clevis-

A beautiful clevis ideal for your Hot Rods' suspension or build into your suspension system on your dirt track race car! Strong, zinc-plated steel construction to resist corrosion for years of use. 5/8-18" RH threaded with a 3/8" slot and 3/8" hole.

Perfect for any of your customs suspension building needs!

  • Zinc-plated steel construction to prevent corrosion
  • Use to build custom street rod suspension
  • IMCA approved for use in the racing world as well
  • Features a 5/8-18" RH thread w/ a 3/8" slot and 3/8" hole
  • Sold each

Rod Ends-

These right hand standard rod ends are a general purpose, two-piece design. They have a carbon steel body and a hardened steel ball without a race (metal to metal contact).

Applications: Clutch, brake, steering linkage, & suspension components on moderate horsepower applications.

Assembly: To ease assembly, be sure to run a tap or die through the threads on chrome plated fasteners and apply an anti-seize compound to prevent galling of the threads.

IMCA Approved.

Jam Nuts-

If you've got spherical rod ends on your vehicle, you'll probably need jam nuts. You might also need them for tie-rod ends or other types of fittings and connectors. Our jam nuts are made from premium steel (zinc-coated for corrosion prevention), and they're available with either right hand or left hand threads.

These steel fine thread jam nuts are for use with rod ends, heim joints, and clevis.

  • 5/8 Inch-18 NF Fine Thread
  • Sold in bags of six nuts.
  • Choose left or right thread.

Shackles-

  • Fits front or rear springs. All measurements are width of spring. All nylon bushed shackles are 1-1/2" shackle bolt center to shackle bolt center.
  • Bushings are included. Bushing O.D. is 3/4".
  • Update those worn out shackles and bushings on your hot rod and add some style with this chrome version
  • Chrome plated steel shackles fit a 1-3/4" wide spring and have standard nylon bushings included
  • Measures 1-1/2" center to center on the shackle bolts and bushings are 3/4" O.D.

Shock Mounts-

New, FORGED steel lower shock mount design is stronger than the competition and incorporates a key slot to stop the rotation other brands suffer from. Machining of matching key slot into perch bolts may be required. Stud for the shock eye mount is 5/8".

  • These are cut with a 1/8th inch keyway slot, but the key stock is not included.  This can be purchased at almost any hardware/home improvement stores.

 

Charts

Speedway Motors 91639505 Specifications

KEY SPECS
MFG. Part #91639505
BrandSpeedway Motors
Front Suspension TypeStraight Axle
Suspension Height Adjustment3 Inch Lowered
Control Arm StyleRadius Rod
Shock TypeNot Included
Spring TypeLeaf Spring
FinishNatural
Rotor DiameterNot Included
Spindle StyleFord Custom
Dropped SpindlesNo
Dropped AxleYes
Dropped Control ArmsNo
Front Leaf Spring StyleSpring-Over Axle
Spindles IncludedNo
Brakes IncludedNo
Steering IncludedNo
Hardware IncludedYes
Welding RequiredYes
GENERAL
Straight Axle StyleTube

Ratings & Reviews

5

2 Reviews

Overall Assessment

Customers highly appreciate the product for its excellent quality and practical application. Highlighted features include its perfect fit, ease of installation, and usability particularly in upgrading older models. The inclusion of cone spacers in the kit is a suggested improvement. Users' experience indicates a superior performance compared to competitor offerings.

5

2 reviews

5

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excellent front end kit

5.0

11 years ago

Ray Ellis

CT.

Verified

I bought this kit for my 1932 Ford frame and it was perfect, everything fit first time, easy install done in couple hours !!!

Would Recommend

Great way to up grade old stock

5.0

12 years ago

Ricks29

Bakersfield, CA, USA

Verified

this is a kit its the only way to go the only thing that had to be order was the cone spacers witch is recommended in the instruction's might put them in the kit other than that its all ++++++

Would Recommend

Showing 2 of 2 reviews

Questions & Answers

1 Question • 1 Answer

Spring included 4 leaf or 6 The picture shows a 6 leaf spring, but the text says 4. Which is it ?. I'm building a rod with a vintage hemi, and need more than 4 leaves, I'm sure !

by 68mopar

• 13 years ago

1 answer

1 of 1 questions shown

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