My original speedometer broke with = about 70,000 miles on it.  I bought a used replacement and installed it but it = has nearly 140,000 mile on the odometer.  Is there a place where I can = have the original repaired?  The problem seems to be that the place where = the cable slips into the speedo should be square but has become rounded off thus = allowing the cable to spin without turning the speedo drive. Thanks for your help.