Description
78% Speed up Ratio Adapter for Dodge / GM applications, AA17778
If your truck tires have been switched to larger tires or you just need to speed up your speedometer this ratio adapter will correct your problem.
This speedometer ratio adapter will increase your speedometer reading by 78%.
Use +61% to convert MPH to Kilometers.
These adapters go to the transmission or transfer case only. Not behind the speedometer cluster itself.
Includes the 4 piece Small Parts Kit.
Speed Up Percentage indicator number:
| 11% Speed up | AA 1.1111 |
| 20% Speed up | AA 1.2020 |
| 28% Speed up | AA 1.2844 |
| 38% Speed up | AA 1.3846 |
| 44% Speed up | AA 1.4400 |
| 50% Speed up | AA 1.5000 |
| 61% Speed up | AA 1.6154 |
| 78% Speed up Ratio Adapter | AA 1.7778 |
| 100% Speed up | AA 2.0000 |
If you need assistance with figuring out which percentage you need, feel free to call us with these speed readings:
| When your GPS shows: | What your Speedometer displays: |
| 40 mph | ?? |
| 50 mph | ?? |
| 60 mph | ?? |
Please be sure to give us these readings in this EXACT order (40,50,60) to prevent receiving the incorrect percentage.
For information, call 888.201.2066 or send an email to jim@transmissioncenter.net
For more Speed up Ratio Adapters, click HERE!
Click HERE for the Main Speedometer Gear page!
