Speedo correction for larger tires?
When is it necessary to get a speedo correction for larger tires? I went from a 265/75 to a 285/75 both 16 inch. Would the height even change?
Forum Discussion
The difference will probably be minor however you can do it. With an older PSD it is not a bad idea to invest in Laptop software from AutoEnginuity and the enhanced Ford option.
http://www.riffraffdiesel.com/autoenginuity-total-ford-enhanced-bundle/
It will give you some great diagnostic tools along with the ability to send commands to the ECM to test various systems. Changing your speedo calibration based on tire size is pretty easy. I've attached a link to some instructions.
https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3b29kbnRoaW5nczh8Z3g6ZmQ4YzhmNTYwODNiYTUx
If it is really bugging you, next time you are near North Alabama give a shout and I can hook up my laptop and adjust your speedo. PS. Hope you already have a good gauge setup to watch your EFT's and trans temps. A 6.0 trans cooler is a great upgrade for TC's and towing.
http://www.riffraffdiesel.com/autoenginuity-total-ford-enhanced-bundle/
It will give you some great diagnostic tools along with the ability to send commands to the ECM to test various systems. Changing your speedo calibration based on tire size is pretty easy. I've attached a link to some instructions.
https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3b29kbnRoaW5nczh8Z3g6ZmQ4YzhmNTYwODNiYTUx
If it is really bugging you, next time you are near North Alabama give a shout and I can hook up my laptop and adjust your speedo. PS. Hope you already have a good gauge setup to watch your EFT's and trans temps. A 6.0 trans cooler is a great upgrade for TC's and towing.
