Clemson, the TS you entered looks pretty close.
What Cody was trying to tell you is that the speedometer in the dash always reads about 2-3 mph higher than it should due to mechanical effects. But, if the Gryphon shows a correct speed (which you can verify by a GPS among other methods), you've set things up correctly and your odometer will be correct.
Now you can use the dash speedo and hold a speed 2 mph above the speed limit and be legal (at highway speeds)!

However, the error drops at lower speeds, so in a school zone, don't drive faster than what's posted.
- Jack
__________________

2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam