larger tires toasting onboard computer

[Big Bear Bob]

Please excuse the newbie questions, I haven't had a four wheel drive in 15 years, and believe me things have changed.
I was reading that increasing tire size can cause all sorts of problems on the newer Explorers, from simple speedo calibration to the transmition not shifting the way it should, and the ABS sys to go out of whack all because these systems interact with an onboard computer thats basically set for the stock tire size?

I hope I haven't opened a can of worms by putting 31x10,5 15's on my 98 XLT?

Thanks ahead of time for the info

 

[Jason_25]

Did a Ford dealer feed you that BS?

You may have some speedo problems with the 98, but you can find someone knowledgeable to repogram your speedo.

But the big questions is this:
Does everything still work fine? I'm willing to bet it does. So if the speedo is off a couple of points who cares. Just slow down. With larger tires you won't be able to stop as well anyway.