You can have the pinion factor change to get the speedometer close to the correct reading. But will need a scanner to going into the ABS module and change the settings. But first i would pull the wires at the output sensor connector. You could have a wire that starting to break inside the connector.

Would think work to calibrate?
http://www.autoanything.com/performa...A3757A0A0.aspx

second, where is the output sensor connector? and where do I buy a new one?

So what are you trying to say?

Why would the door say one thing but the vehicle have another? That doesn't make any sense. and what do you mean your "build sheet"? you fixed the vehicle? so you put those size tires on?

and either way. Would you say I have oversize tires? I don't see why they wouldn't be. Pretty much the only thing I can find that would make my odomoter go way off and my spedometer be off slightly.

The build sheet is a list of everything that the truck came with from chrysler. You can request one from them online. My truck came from the factory with 31x10.5r15 tires and the sticker on the door still says 235/75r15. 31x10.5r15 tires are not oversize, they were a factory option.

Here's the line from my build sheet:
TUT 31X10.5R15 OWL All Season Tires