I have a 2005 f250 supercab short bed lariat truck. I have it lifted 8 inches on 38 inch tall tires. I have the sct chip and have adjusted the revolutions per mile to my tire but my speedometer is still way off. Can the sct chip actually fix my speedometer or do I have to but he super chips flashpaq. Here is the superchips website.
Superchips / Tirepaq for Ford Diesel & Gas Trucks/SUVs - 99-07 6.0L & 7.3L Ford Diesels and 04-07 V6, V8 & V10 Ford Gas Trucks/SUVs / www.superchips.com
Will this interfer with my sct programs? Would I ahve to return my sct chip by to the stock revolutions per minute and use the flashpaq to adjust my shoft points? This uses the same diagnostic port that the sct chip uses so why cant my sct chip do this.
Does this flashpaq thing work or is there another better way to adjust my speedometer? Thanks