littleblazer said:
But since it's a 2004 all it needs is to be set up with the tech 2, now my question is, why won't they? But if there is no associated problems once it's calibrated by the tech 2, why shouldn't I? Guess you can just call me curious.
I want the bigger tires.
It can not be done with a Tech 2. If you read that here, let us know so we can remove the wrongful post please.
Purefection said:
Laziness. You can buy a programmer and do this yourself.
Really... How come no one has been able to do this all the years of people adding bigger tires to this platform in the pre-06 variety? What programmer can do this, please enlighten us?
Sparky said:
A... Actually you can't change tire size in the computer on the 2002-2005 trucks anyway. It just isn't possible. They're actually right, if you do attempt to change anything related to it people have had all kinds of problems until it was set back. Even the aftermarket can't get it to tune right.
B... I have 32s on my 2002 and just live with the speedometer being about 10% slow (actually slightly less than that but 10% is an easy number to adjust for on the fly). Yeah, the odometer is also now 10% off, but at 203k miles I really don't care.
A... Bingo. Can't be done correctly.
B... You know it is not a straight 10 percent across the board right? It will be a curve not a straight line. Not enough to worry about and with other vehicles I just found my common mph needs on GPS(40, 55, 70) and mentally noted what the vehicle read at those so I knew my speeds. I am sure you got it handled though, knowing you.
littleblazer said:
Got it. So basically the truck can only be programmed for the two factory tires, and anything outside of that set parameter causes issues. Okay. No other issues besides speed and mileage though? I think I can live with things being a little off for an improved stance.
Increased rolling resistance can cause extra wear on bearings. Extra tire weight can cause extra wear on suspension. Neither are a real concern, but they are basic facts. Many go much larger on tires with little to no issues so you will likely be fine. Do keep in mind that any deferred maintenance of those items may appear with your tire change, but are not necessarily attributable to the size change directly.