My analog speedo is showing about 5mph faster than my digital gauge. I've verified with GPS that the digital gauge is showing the correct speed. I am on the stock wheel and tire size. Is there any way to adjust only the analog speedo?

 

You said: "I am on the stock wheel and tire size." But, there are many different stock sizes for wheels and tires.

What size tires are you running?

 

225/45/18 on the front and 245/45/18 on the rear on the stock '07 base 18" wheels.

 

OK... You need the calibration tool. Do a Google search: "350z calibration tool"

 

Or you could just ignore the analog speedo since you know it's off. I don't think I've ever used my analog speedo, much easier to glance at pod #1 to see speed. Personally, I never use any of the other scroll features on that readout anyways.

There are shops that can calibrate your speedo for you if it bugs you though, just look 'em up on Google for your area. This used to be a big business back in the day of pure mechanical speedo/odos, not so much anymore but they're still around. (At least where I am there are a few places).