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Flathead V8 to Ford AOD Transmission Conversion Kit
Flathead V8 to Ford AOD Transmission Conversion Kit

Flathead V8 to Ford AOD Transmission Conversion Kit

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Flathead V8 to Ford AOD Transmission Conversion Kit
Flathead V8 to Ford AOD Transmission Conversion Kit
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Part # 91028907
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Adapt your 1949-1953 Ford Flathead V8 engine to a modern Ford AOD automatic overdrive transmission so you can keep those stump-pulling low rear end gears, while still maintaining engine life and gas mileage. Plus, the lightweight flexplate and torque converter do wonders for throttle response and stop-and-go driving!

This kit includes Speedways Street King AOD Ford transmission compltely remanufactured with heavy duty clutches, special shift kit, torque converter, engine adapter, special flexplate, modified 12-volt starter, hardware and instructions.

Transmission has a one year warranty.

NOTE: Must be used with open drive rearend (not included). Cooler, shifter, and chrome dress-up parts are sold separately. Fill tube, dipstick and kickdown cable are included. 

Item Details

for 1949-53 Ford Flathead V8


  • 1949-1953 Ford 8BA and 8CM Mercury Flathead V8 engines without integral bellhousing


Speedway Street King AOD transmission features:

  • Handles up to 450 HP
  • 2200-2400 rpm stall torque converter
  • Firm, crisp shifts from Kevlar bands & H.D. clutches
  • Extra wide overdrive band & extra 3-4 clutches to cushion downshifts
  • Street/Strip Valve Body - everyday street driving and weekend trips to the drag strip
  • Improved Lubrication Circuits - reduced heat/prolonged life
  • Chrome steel transmission pan
  • Includes TV pressure cable, dipstic, & fill tube


All warranty issues should be addressed to:

Performance Automatic, Inc.
Attn. Harvey Baker
8174 Beechcraft Ave.
Gaithersburg, MD 20879
P 301-963-8078
F 301-963-5076 

Some parts are not legal for use in California or other states with similar laws/regulations

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What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Speedway Street King Ford AOD Transmission
    Qty x 1
  • Flathead-C4, Adapt & Hardware
    Qty x 1
  • Flexplate, Flathead Ford to C-4 Ford Transmission 164 Tooth
    Qty x 1
  • 1949-1953 Ford Flathead C4/AOD Replacement Starter, 12V
    Qty x 1
  • Ford 289-351W C4-AOD Transmission Block Plate
    Qty x 1

More Like This


Q & A

Videos & Articles
  • Tech write-up and a video of a Lokar shifter install on an automatic transmission.
  • Races can be won or lost at the starting line. Choosing the right torque converter can put you ahead of the competition. Speedway has all the basics to show you how to choose the right stall for your application.
    Learn More
  • Want to extend the life of your transmission and the ATF inside? This article discusses the merits of transmission coolers, both factory and auxiliary.
    Learn More

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