Take a GPS and check your speed on the dash against it and you will know how far you are off .... not only does the larger tires effect the speedo it also effects the ABS so if you plan on keeping the 35" tires on I would suggest getting the Dealership to reprogram your PCM for the ABS and Pinion Factor ... the only thing you will need is the Revs Per Mile of the tire for them to correctly calibrate it. Just my .02 ... I had this done on my 1500 for 35" and have tald many to do this cause it is well worth it
I hope you are wrong about DC not adjusting 06s for greater than P285s (about 33") because if my dealer won't reset my power wagon for the 35s that are going as soon as I get it, I'll be pretty upset with them!
It could be that your dealership doesnt have the right updated software in there DRB for the 06 to change it so the easiest thing to tell you is that DC said they cant ... which is probably a line of Bull
Cant this size difference be calibrated with the SC programer? or would i still have to go to the dealer?
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