gear ratio

[DacotahLeather]

U7135, v.9r17, 2005 300C

I could use some info on gear ratio selection. I have 305/45/18 DR's. Should I be changing gear ratio, I have been just leaving it stock. Could this have anything to do with code PO700 (tranny control system MIL request) coming up?
Thanks.

[Mike_Levy]

Leave the gear ratio setting alone unless you changed the rear end gears. You could change Tire Size for the Drag Radials.

Either way it has nothing to do with the code. Thats just an early 05 code that shows up sometimes.

[DacotahLeather]

Great! One less thing to factor in since I have stock gears. Thanks!