Speedometer.

[Chevy 97]

The tune I have in my truck right now, the speedometer is not reading correct. I am going to be changing transmissions so I want to put the correct numbers in for the VSS Pulses. Also the TOS. (Trans Output Shaft Revs.) Right now the Pulses read 61368 and the TOS reads 1534.1795. I enter my tire size into the speedo calculator. (245 75 16) My TOS reads 1534.1640 and the Pulses read 61367. I change those numbers then press save. I go to check to see if the numbers change and they did not. My gear ratio is 3.73.
Here is a picture of the speedo Calculator.

This is a picture of what the numbers I changed.

Once I saved the change, I go to the tune to see if the numbers were the same or if they changed. The numbers come back the same. like I never made any changes.


Is there any other numbers that need to be changed. Not sure what to do here.

[joecar]

Post your tune file.

[joecar]

BTW: you can get a screenshot directly by doing SHIFT-PRTSCR and pasting into something that can save .png or .jpg files.

[joecar]

Should this be moved to Gen III Tuning...?

[Chevy 97]

Okay.
2002 Chevrolet Express Van Automatic L31 5_0005.ctz

[joecar]

Ok, I'll take a closer look at your tune's speedo stuff.

[Chevy 97]

Thanks.

[joecar]

I moved this thread to Gen III Tuning.