37" BFG ATs

[KaiserM715]

- It is for sure off, my thoughts are that it is some how connected to the tire pressure sensors.

What would the TPMS have to do with it? It only senses tire pressure.

 

[Madcowranch]

OK I'm gonna watch my nav tomorrow to see if its off.

 

[Red]

Of course it will be off, you are riding higher now

 

[ALDABRAMAN]

Of course it will be off, you are riding higher now

- Can you please explain why taller tires would cause this issue and any remedy?

- Mine started the instant i drove off after getting 37's installed.

 

[Yukon Joe]

Larger circumference of the tire vs the 35" tire.

Yukon Joe
www.RUNRAPTORRUN.com

 

[zsommer79]

Larger circumference of the tire vs the 35" tire.

www.RUNRAPTORRUN.com

Your GPS position should not change because of tire size. Maybe you are an inch higher up but your location should be pretty much the same. Maybe the system is trying to estimate your position somehow based on speed instead of actually tracking your position?

 

[RaptorFlipper]

I love the ride. Hard to explain. Softer, smoother, higher. My display must be broken because I have gotten the exact same gas mileage before and after the supercharger, full exhaust, and now 37's. The thing cannot be working. I have an Aeroforce guage, guess I will set that to see. My tune is off, but JDM and SCT finally got me a remedy today. Will load tomorrow. Anyone on the fence about 37 BFG's-do it. Looks great, rides, better. Fantastic!

 

[t_j]

Your GPS position should not change because of tire size. Maybe you are an inch higher up but your location should be pretty much the same. Maybe the system is trying to estimate your position somehow based on speed instead of actually tracking your position?

The gps in the truck is assisted gps, meaning that it uses inertial, speed and other sensor data to improve accuracy. If you have a tuner set your tire size correctly and your gps will be accurate again.

 

[BAJASVT]

The gps in the truck is assisted gps, meaning that it uses inertial, speed and other sensor data to improve accuracy. If you have a tuner set your tire size correctly and your gps will be accurate again.

Definitely true. I disconnected the VSS (Vehicle Speed Sensor) wire from a friends 2009 F-150 to see if it would unlock the features on the touch screen that are disabled when the vehicle is moving. It worked for a few minutes after we started driving around, but then we started to notice the location accuracy and time to destination in the nav was way off... eventually resulting in a error message and the nav not working at all. We ended up just putting the VSS on a toggle so he could enter an address while driving and then flip it back on.

---------- Post added at 07:58 AM ---------- Previous post was at 07:55 AM ----------

* Interesting, when you do that can you advise if it corrects the GPS issues?

* Do you notice more tire vibration with 37's?

No, I didn't notice any increase in vibration.

 

[ALDABRAMAN]

No, I didn't notice any increase in vibration.

- I disconnected by Neg terminal today, I will report if that fixes the issue!

- One of my rear tires took 10oz + 6.25oz, they are replacing it tomorrow. Must have an out of round tire on the rear causing the shimmy