i have a question about the speedo in my 57 chevy truck im using the original one an i bought a new cable to hook up to my transmission i'm running 350 chevy with 350 automatic on the column the speedo seems to work good but the needle is jumpy an bounces between speeds its not like solid like an normal speedo any reason for this ? way to fix it ? thanks much


1957 Chevy Service Station Wrecker