The speedometer on my 1948 chev panel never worked. So I found that the cable was broke and replaced it. That one broke also and was told the my speedometer needed bearing but tore it apart and found the it was just tight. So oil and wd15 and now it spins just fine but when I put it all back togeather it reads 10mph and not 0. What did I mess up and how can I fix it. Thanks