Is there a place in the tech 2 to see the speed the PCM is sending to the speedometer? Mine is off quite a bit. I’ve verified the tire size is correct; couldn’t find where I could verify the gear ratio though. Thanks
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The tag on driver's door jam edge or body side has OE installed size/ rating tires. Also the glove box door RPO tag has three digit code for installed tire size. Same tag has gear codes, and all options your truck was built with.Is there a place in the tech 2 to see the speed the PCM is sending to the speedometer? Mine is off quite a bit. I’ve verified the tire size is correct; couldn’t find where I could verify the gear ratio though. Thanks
Had some time to play with this today and was able to find it. Below are the screens to cycle through:
F0 Diagnostics
Select year
Select vehicle type
F0 Powertrain
Select engine
Select product line
Select transmission
F1 Data Display
F1 Transmission Data Display
F0 Transmission Data
Vehicle speed is on line 8
From the PCM my speed is spot on, so just need to figure out the deal with the speedometer.