No change is needed on a gear swap. Going from 3.55 to 4.30 has no effect on the speedo.
Correct!
Yes it will change the speedo.
Incorrect!
Easiest way would be to do your gear swap, then use a gps to see how far off it is. Then it will take some playing around with tire sizes in your mini maxx, but you should already have everything you need to fix it.
Everything needed to make the speedo right is already there. If you understood where the speed is measured you'd understand that nothing needs to change.
The vehicle speed sensor is on the rear axle. It measures the rotational speed of the axles. If th axles are spinning at 500 RPM at a given speed, when you change the axle ratio, what speed will the axle shafts be spinning at the same speed as before? The answer is 500 RPM.
The driveshaft speed will change, but that doesn't matter. That isn't used for vehicle speed.
If the speedo reads off of vss then a gear change and tire size change shouldn't offset
Tire size DOES affect the speedo. That WILL change the RPM of the axle shafts at any given speed. That's why there is a correction in the software for tire size, but not axle ratio.
Well that's an interesting start to this thread lol. 1 person says you don't have to do anything and the next describes how to fix it
It's now 2-1 for nothing needs to be done.
Why don't you verify how accurate your speedo is before the change, and then check it after the change. That will prove that nothing needs to be done.