✅ 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 (additional mods/adapters needed)

❌ These adapters will not fit behind the speedometer cluster


This speedometer ratio adapter will speed up your speedometer reading.

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

Common increase ratios available from our store:

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% increase adapter to convert MPH to kilometers.

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 / Increase Rate for your specific application.


Decrease Adapters also Available! Check out our STORE!


We can build custom ratios! Send us a PM with your required numbers!



If you need assistance calculating your percentage, send us a brief PM including these specific readings:

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



This process goes easier with two people in the vehicle. 

One person in the passenger seat with a GPS device/cellphone displaying current speed, who will alert the driver at 40mph, 50mph and 60mph.
 Then the driver can more accurately relay what their speedometer displays at those 3 intervals.
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 key-way was bound up and twisted in half, it was overtightened during installation.

Ensure 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.


☆ Parts made in the USA, hand-assembled in Louisiana, USA ☆