Rmr32990

I go the car from my grandpa and he bought it used in the 70's, It has always been in california. when he owned it didn't do this, but it did sit for 10 years before i started restoring it.

Ok ill check that out

thanks, but the differential is the original, so not sure why anything would have changed with the gears.

It has the original differential and i'm fairly sure i'm running regular tires on it, they're 195/70R14.

I tried reseting the needle like you said, but my gauge starts at 0 not at 20. The car has the original gearbox. Also the reading is not off by a constant number. The faster the car goes the more inaccurate the speedometer becomes. thanks -Ryan

I'll try reseting the needle. and let you know if it works. The car is a '72 240Z. Thanks -Ryan

When driving the speed shown on the speedometer is very different then actual road speed. When i go about 40 it says 60. when im going 70 it says about 100 or 105. I,ve checked the cable and it doesn't seem to be damaged. I checked the gears in the speedometer and the are slightly damaged, but i don't know if that would cause it to read high. Can anyone help?