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58 chevy truck speedometer problem

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58 chevy truck speedometer problem

lhs70 lhs70
New User | Posts: 12 | Joined: 03/13
Posted: 04/18/13
02:11 PM

I have a 58 chevy truck, 3speed manual trans, I put in a new speedometer cable, and took out old speedometer gear 18teeth,and put in new one
when i start truck with speedometer cable disconnected at dash, put truck in gear with jack under rear end, the cable does not turn.... maybe has wrong gear, (does anyone know what correct number of teeth it should be) why doesn't the cable turn?? any sugestions? or help


hotrodace hotrodace
User | Posts: 156 | Joined: 03/11
Posted: 04/20/13
12:18 AM

What shape was the drive gear on the trans output shaft? Did you spin the shaft and inspect the gear. How sure are you that it hasn't lost the retainer and spinning on the shaft. Did the cable spin before you changed parts? Can you spin the cable by hand at the speedo end when all connected? Lots of trans gear calculators online but if all your equipment is original then direct replacement is all you need.