Product Summary

Universal Fit, Straight Axle Front Suspension Type

  • 48" I-Beam Axle Model A 4-bar for Ford spindles
  • Plain steel
  • 31-1/4" eye-to-eye 6-leaf Super Glide cross spring
  • Urethane-bushed 21" long 4-bar assembly
  • All hardware for assembly

Comes as a Kit

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Key Specs

MFG. Part #91639531
Front Suspension TypeStraight Axle
Suspension Height Adjustment4 Inch Lowered
Control Arm Style4-Bar
Shock TypeNot Included
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Speedway Motors 91639531 Details

Save yourself the searching and confusion with these complete '28-'31 Ford Model A front suspension kits. Each kit includes a 48" wide, 4" drop I-beam axle, our famous urethane-bushed 21" long four bar assembly, perch bolts, lower shock mounts, spring shackles, Super Glide spring and the necessary brackets and hardware needed for assembly.

Requires '37-'48 Ford passenger car spindles.

Each kit includes:

  • 48" kingpin-to-kingpin I-beam axle, 4" drop
  • Urethane-bushed 21" long 4-bar assembly
  • 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 cross spring
  • All hardware for assembly

Charts

Speedway Motors 91639531 Specifications

KEY SPECS
MFG. Part #91639531
BrandSpeedway Motors
Front Suspension TypeStraight Axle
Suspension Height Adjustment4 Inch Lowered
Control Arm Style4-Bar
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
Welding RequiredYes
GENERAL
Straight Axle StyleSolid I-Beam

Ratings & Reviews

4.6

5 Reviews

Overall Assessment

Customers commend the product for its superior quality and robustness, further distinguishing it from competition due to its cost-effectiveness. As a trusted provider for 15+ years, our product's usability in building hot rods has been praised. Despite requiring aftermarket spindles for some setups, our comprehensive 4 bar Model A kit, complete with adjustable front spring perches and front panhard bar, is highly recommended for Model A suspension builds due to its exceptional value and completeness.

4.6

5 reviews

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Filter by Ratings

1931 Model A 5 window coupe

5.0

4 years ago

Fast John

Orlando Fl.

Verified

I like the kit if I could just get the back order. No axle

Would Recommend

Yes great product

5.0

5 years ago

Mike

Stoney Creek Ontario Canada

Verified

Fabulous looking and stong

Would Recommend

ive purchased more than one

5.0

9 years ago

grumpy

valley stream ny

Verified

Ive been buying from speedway for over 15 years and have never had and problems with products i will continue to purchase parts as long as i am building hot rods

Would Recommend

Needs aftermarket spindles

3.0

9 years ago

gregga

Cedar Rapids

Verified

Mounted this assembly and hung my 37 Ford spindles only to find they bind on the axle drop area. Bought aftermarket spindles and arms and found the tie rod ends put the rods into contact with the bars. Had to convert to Heim joints.

Would Recommend

every thing you need!

5.0

12 years ago

bigvinny51

Pittsburgh, PA, USA

Front 4 bar model a kit is a great value. No one comes close in price and it comes with every thing you need to build your Model a front suspension. kit quality was good and very complete. I upgraded mine with the adjustable front spring perches and front panhard bar kit.

Would Recommend

Showing 5 of 5 reviews

Questions & Answers

8 Questions • 9 Answers

What width frame would be ideal to use with this kit

by Rek

• 8 years ago

2 answers

Will my factory 40 ford spindals work on this axle

by Johnwayne

• 9 years ago

1 answer

could I substitute the 4 bars for stainless bars

by Nikk

• 9 years ago

1 answer

I am building my own frame. I am thinking of making it 28" wide inside width. Would this measurement be adequate for this kit? Should I make the frame wider than 28"?

by Luke

• 9 years ago

1 answer

can a drilled I beam be substituted?

by Pop

• 10 years ago

1 answer

What is the maximum frame width that will work with these wishbones. My frame is currently 35" wide. Do I need to narrow it? I'm also considering a 4 bar or hairpin setup. I will be using cross steering with a Vega Box. Thanks!

by Luke

• 10 years ago

1 answer

What is the difference between this kit and 91639501 ?

by Luke

• 10 years ago

1 answer

could a 46" axle be substituted?

by

• 15 years ago

1 answer

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