HELP: Resetting the speedo after re-gear!
So I just got my truck back from the shop yesterday after they finished putting 4.56's in it (cost me a pretty penny, too...) and the speedometer is way off which is to be expected. It's off by quite a bit, a little under 30mph difference (70 mph = 90 on the gauge).
I definitely want to get this corrected ASAP but I've heard a few different things about getting it done. My first thought was to use my EDGE Evolution Tuner which has an option to set the axle ratio, I used it to go from STOCK to 4.56 but as soon as I started the truck it threw the P2601, or put the truck into "engine failsafe mode". I uninstalled the tune and put it back to stock and the truck ran just fine, no CEL, no failsafe mode.
My second thought was to take it to a dealer and have them flash it, but someone told me most dealers won't change the settings to accommodate 4.56s and 37 inch tires so I'm at a loss.
Has anyone here done a gear swap and dealt with this issue? Or had it fixed?
Any help would be great!