I changed the speedometer out in my 62 a while back. The original read the proper speed(before it decided to retire). I ordered a new one and it reads 10 MPH slower. My question is this... inside the old unit there are two gear shafts that still look like new. I wonder if I could put those in the new spedometer to correct the problem or if I just have to live with it? Any help from the wise elders would be greatly appreciated.
