Chevy 97
January 8th, 2017, 02:54 PM
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.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164105_zps0yi6o2r0.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164105_zps0yi6o2r0.jpg.html)
This is a picture of what the numbers I changed.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164508_zpsbyb6xf1m.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164508_zpsbyb6xf1m.jpg.html)
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.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164651_zpsefqzr8nb.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164651_zpsefqzr8nb.jpg.html)
Is there any other numbers that need to be changed. Not sure what to do here.
Here is a picture of the speedo Calculator.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164105_zps0yi6o2r0.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164105_zps0yi6o2r0.jpg.html)
This is a picture of what the numbers I changed.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164508_zpsbyb6xf1m.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164508_zpsbyb6xf1m.jpg.html)
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.
http://i1266.photobucket.com/albums/jj539/Chevy971/Truck%20Repair/20170108_164651_zpsefqzr8nb.jpg (http://s1266.photobucket.com/user/Chevy971/media/Truck%20Repair/20170108_164651_zpsefqzr8nb.jpg.html)
Is there any other numbers that need to be changed. Not sure what to do here.