Trinity Chrysler 300 3.5 Tire Size won't change

[darkstarsinner]

So I hooked up my Trinity to my 08 Chrysler 300 3.5L Limited. Everything seems to work okay. However when I go to change my tire size (Trinity automatically shows it as being on 20" wheels) it will fail to flash every time. I am currently running the 89 tune flash file= dcx_gas v.1r09e Bus: CAN SCIA SCIB VPW and my saved calid: 05187030AH. Any help would be greatly appreciated.

[darkstarsinner]

Anybody?

[mikel]

we'll have to look into this...

[darkstarsinner]

Thank you. Is there any update as of yet? In the process of purchasing much larger wheels and would like to be able to calibrate the speedo.

[mikel]

does it let you enter the tire size, and ask you to cycle the key?

[darkstarsinner]

It does. But after I cycle the key it says the change failed.

[mikel]

it should be working then, despite the error, confirm with a GPS

[darkstarsinner]

it should be working then, despite the error, confirm with a GPS

I don't have a GPS. Is there anyway updates will fix this?

[mikel]

change it to a small value and see if the speedo goes out of whack, if so, its working

[darkstarsinner]

I figured it out. I had to change the tire size BEFORE I flashed the tune. Then it stayed. Anything after would fail.

[typan]

Mikel, would it make any sense to do a wheel size change if the new wheel size is only 1.4% difference over the original size?

[mikel]

1.4%?

No....