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Standard V8 Rear Wheel Drive Applications (1999 to Current)

  1. Insert your new tire and gear in the columns on the right. If your tire height has not changed, enter the same value. If your gear has not changed enter the same gear value.
  2. When you have entered the correct values for your vehicle click the "Calculate for New Values" button. This will use the values you entered to determine the new VSS Pulses/Mile, Trans Revs/Mile, Final Drive ratio, Tire revs/dist values found below.
  3. When you are satisfied with your changes, click the Save Changes button on the top right of the form.


V8 Rear Wheel Drive Applications With Transaxle (Corvettes) and V6 Front Wheel Drive Applications (W Body)

  1. Insert your new tire and gear in the columns on the right. If your tire height has not changed, enter the same value. If your gear has not changed enter the same gear value.
  2. When you have entered the correct values for your vehicle click the "Calculate for New Values" button. This will use the values you entered to determine the new VSS Pulses/Mile and Trans Revs/Mile found below.
  3. When you are satisfied with your changes, click the Save Changes button on the top right of the form.


V6 Rear Wheel Drive Applications (All)

  1. To make changes enter in your new tire height (in inches) divided by your new gear ratio.
  2. When you have entered the correct values for your vehicle click the "Calculate for New Values" button. This will use the values you entered to determine the new VSS Pulses/Mile and Trans Revs/Mile found below.
  3. When you are satisfied with your changes, click the Save Changes button on the top right of the form.


Transaxle or Front Wheel Drive:
If your vehicle has a transaxle like the corvettes, or is front wheel drive like W Bodies, select yes. In most cases this will be auto-selected for you but in some cases you may need to select it manually.


Axle Settings


Speedometer Scalars (We do not recommend that you manually adjust these values)


Auto Scale Transmission tables

This option will automatically scale the transmission tables to adjust for a new gear or tire to maintain similar shift RPM's. There is also a manual scaling option where you can enter you own scaling factor to scale the trans tables up and down.