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Daytona Dick
07-22-2014, 12:39 PM
Four weeks ago while driving about 55 mph, my speedometer jumped up to about 80 mph and then died. My mechanic pulled it later that week and told me it has sheared off just inside the cable near the trany. I got a NOS cable from Stude Intl and had it installed, It lasted for about 110 miles. This time it broke as I was starting to pull out of a parking lot, needle jumped and went dead. I am waiting for a new cable to have my mechanic pull this one and replace it. Have you ever heard of a similar instance. My mechanic suspects it might be something in the trany? Iíll find out when he pulls the broken cable. I was wondering if any of you had ever encountered this. Or words of advice.

Son O Lark
07-22-2014, 01:43 PM
I do believe you have to lube the cable, even if it's new. I'd see if there is a lube cup for the speedo also.

61Lark
07-22-2014, 01:45 PM
I'd check the speedometer also. I had a similar issue that was caused by a gummed up speedometer requiring too much torque to spin. A new speedometer and cable core fixed my problem.

blackhawk
07-22-2014, 02:26 PM
Yes, lub the cable core before inserting it in the outer sheath, even if the part you purchased is a complete cable (inner, removable core and outer protective sheath). If only purchasing the inner core and you have the outer sheath removed, try to wash the old gummy or caked lub out of the outer sheath. Then, lub the new core, and move it back and forth in the housing to work some new lub into the sheath. Check to make sure the outer sheath is not kinked or smashed somewhere along its length. Turn the speedometer by hand by turning the part where the cable attaches to make sure the speedometer and odometer are turning freely. ~ Dale

studegary
07-22-2014, 02:30 PM
Yes, lub the cable core before inserting it in the outer sheath, even if the part you purchased is a complete cable (inner, removable core and outer protective sheath). If only purchasing the inner core and you have the outer sheath removed, try to wash the old gummy or caked lub out of the outer sheath. Then, lub the new core, and move it back and forth in the housing to work some new lub into the sheath. Check to make sure the outer sheath is not kinked or smashed somewhere along its length. Turn the speedometer by hand by turning the part where the cable attaches to make sure the speedometer and odometer are turning freely. ~ Dale

The above is an answer that I agree with.
Welcome to the SDC Forum!
Your car is a Daytona Sports Sedan.

Daytona Dick
07-22-2014, 04:00 PM
Many Thanks to blackhawk and studegary. I mentioned this to my young mechanic when he put the first complete cable in but he said it was a "sealed" unit and put it in without any extra lube. If one of you would care to elaborate a little, how should he go about taking it apart to lube the new one I have. Service manual was no help to us with this particular item.

Daytona Dick
07-23-2014, 09:20 PM
Thanks for all the help and advice. I found a shop in Bloomington, MN that knew what was happening from my story. They specialize in vintage cards and instrument repair. I need to rebuild/replace my speedometer.

drrotor
07-24-2014, 02:08 AM
Dick-- If you climb under the dash and remove the speedo, take it over to your workbench and GENTLY pry back the tabs holding the case together. Remove the speedo mechanism from the case. There is, as I recall, a hole in the bushing that surrounds the cable input shaft. That is a lubrication hole. Try to get some penetrant in there. The best penetrant BY FAR is a mix of acetone and ATF, 50/50. Let it sit a bit, then try to free it up as follows: grab an old #2 Robertson screwdriver tip. You may have to carefully grind it a little, but you can make a speedo "driver" out of it. Chuck it into your electric drill, and use it to spin the speedo. After it frees up, then lube that hole with aerosol lithium grease (WD-40 brand makes some, so does Liquid Wrench brand). Make sure it's Lithium Grease, not penetrating oil. Work it in, using your home-made drill-driver. Reassemble and install. THIS is why you were breaking cables... Oh, and be sure to soak the wick inside that holds lubricant for an extended time.

rkapteyn
07-24-2014, 09:47 AM
http://www.oreillyauto.com/site/c/detail/CHI0/91812/N2440.oap?ck=Search_speedometer+cable_1031140_-1&keyword=speedometer+cable

Robert Kapteyn