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Jim's Speedometer World

Clark Brothers (CBI) Speedometer Ratio Adapter - 44% Speed Up - AA 1.4400 Ratio

Clark Brothers (CBI) Speedometer Ratio Adapter - 44% Speed Up - AA 1.4400 Ratio

$167.99 USD
$187.99 USD $167.99 USD
Sale Sold out

  • Compatibility: DODGE - GM - CHEVROLET and more!
  • New Assembly, includes 4 piece key end kit
  • Made in USA

CUSTOM RATIO ADAPTER AVAILABLE HERE

CBI AA 1.4400 ratio adapter, 44 percent increase speedometer correction box.

✅ Compatible with 7/8 by 18 thread speedometer cables
✅ All ratio adapters include the 4 piece key-way kit
✅ For use on the transmission/transfer case side
❌ Not compatible with any FORD application
❌ These adapters will not to fit behind the speedometer cluster


As an authorized Clark Brothers Instrument Co. vendor, we provide the industry standard for mechanical speedometer correction.
Authentic CBI quality ensures long-term reliability!

Die-cast aluminum and zinc oxide metal construction.
Direct replacement for the plastic OEM adapter.


This speedometer ratio adapter will speed up your speedometer reading.

Needed if your speedometer displays a lower number than your GPS reading.

11% Speed up

AA11111

Ratio 1.1111

20% Speed up

AA12020

Ratio: 1.2020

28% Speed up

AA12844

Ratio: 1.2844

38% Speed up

AA13846

Ratio: 1.3846

44% Speed up

AA14400

Ratio: 1.4400

50% Speed up

AA15000

Ratio: 1.5000

61% Speed up

AA16154

Ratio: 1.6154

78% Speed up

AA17778

Ratio: 1.7778

100% Speed up

AA20000

Ratio: 2.0000


Use the +61% adapter to convert MPH to Kilometers per hour.

If you recently changed wheels and/or tires, and your speedometer is now reading incorrectly, a ratio adapter may be required.

Select the Speed Up Rate for your specific application.

If you need assistance calculating your percentage, send us a brief email with these clean speed readings to: jim@speedometer.world
(Straight cable, without any previous adapters in place)

The GPS displays:
 But your Speedometer displays:
40 mph
 ??
50 mph
 ??
60 mph
 ??

Be sure to give us these readings in this exact order, 40mph - 50mph - 60mph on the GPS versus what your Speedometer displays, to ensure the proper percentage.
NOTE: If your original 7713 keyway was bound up and twisted in half, it was overtightened during installation.

Make sure that you install the 7713 drive tip nice and snug, but be careful not to over-tighten because that will cause it to get in a bind and snap.

REPLACEMENT #7713 KEY AVAILABLE HERE!



☆ Made in USA ☆

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WE CAN HELP!

📧 Having trouble with your speedometer not agreeing with the GPS?

Send us a brief message with your current application specs and we can help you mastermind a solution!

EMAIL US!