The first thing I did when I bought my LS Mustang was to buy a set of lighter wheels with a square setup (and lower it!), however, when I did this I went to a slightly smaller profile tire (275/35/18 all around). My speedo is off by about 5% and I was wondering if there is anyway to re-calibrate it without and aftermarket tune. Does anyone have any experience with this? Where is the speedo pickup, does it read off the ABS sensors or is there a mechanical tranny pickup somewheres?
Any help appreciated, attached is a picture of my ride.
Any help appreciated, attached is a picture of my ride.
