"It would typically be the rear, but these days I can't say for 100% certain. I'm not sure you will be able to run a 32" tire though. It's just a pretty big jump in diameter. The safe range for a non-modified vehicle is around 3%, this change is over 10%. Obviously adjustable springs will allow you to modify the ride height so that will give you a chance. "
Also he thinks the speedo is connected to the rear axle. I'm waiting to hear form my Dodge service advisor.
"Safe as in, the generally accepted diameter tolerance by manufacturers for alternate tire sizes. If you're using an alternate size on your vehicle for no particular reason and not modifying its capability of using a different tire size, then staying within 3% gives you the best chance of it working out. With modern vehicles there can be systems in place such as all-wheel-drive, traction control, anti-lock brake systems etc. that may not function properly when there is too big of a difference between the tire diameters. For instance, anti-lock brakes can use the difference in tire rotation to determine if a tire is sliding. If the rear tires are rotating slower than the front tires, the system could think that the rear tires are sliding a little bit and activate the anti-lock braking system every time you push the brakes.
We don't have specific instances to go off of with every vehicle to be able to inform everyone on what is going to work and what isn't. We have to use general rules and parameters that apply for most situations and then try to help inform those who are going outside those parameters of things to look out for. You're clearly an enthusiast that's modifying your vehicle in a number of ways to make it how you want. With that comes the possibility of issues arising that you might need to address.
I can't say for certain there will be any issue at all with your vehicle in particular, but going to a 32" is a big difference. If you had said your car is stock and you had no intention to modify the suspension for that tire size, I would say I don't think it's going to work out. If you have the capability to raise it up enough, then you can probably get it to fit. I don't know how much room there is specifically though, even around the tire sides not just straight up.
You going to have to test fit it and see what happens."