Wobbly needle is sometimes caused by the speedo cable. If there is a kink in the inner member, or both the inner and outer members, the inner moving inside the outer acts kind of like a cam, as the inner and outer kinks align, the cable is relaxed. Then as the inner encounters interference with the outer (housing), it slows just a it and causes the needle to drop. This is exacerbated by the spiral wound inner and outer speedo members.
Try removing the inner member and wipe it down good. Inspect the inner member for any signs of wear or shiny spots. If wear looks significant, replace the inner member. Most auto stores have kits for under 20 bucks on the "Help" rack. If there is not significant wear, hold it by the tip, letting it hang. Look for any kinks along the length. Gently straighten any kinks until the inner hangs freely and fairly straight. Pay particular attention to the ends. You can roll the cable on a flat surface and see how straight the ends look. Visually inspect the outer member to ensure there are no sharp kinks or bends. Gently straighten any kinks. Try to keep all radii as broad as possible.
Lightly lubricate the inner member with white lube or another suitable grease, to about a foot from the top. Wipe the inside of the inner ferrule clean and gently slide the inner member back in. You may have to rotate the inner member slightly to align it so it mates with the speedometer pinion. Reassemble and test drive. If this doesn't solve your problem, you may have speedo head issues.
I have never used them myself and have no connection but have heard good things about Bob's Speedometer in Howell, MI. www.bobsspeedometer.com
Steve Charette
On Tuesday, February 6, 2018 at 1:04:41 AM UTC-5, MO wrote:
Attention Heartland bunch. Looking for someone in the Omaha area that can fix my 64 Dodge Speedometer head. There used to be a place up there many years ago. Can't find them. In the Car Council book, there was an ad from a guy at Grand Island , Ne. but phone call results in recording the phone has been dis-connected. No listing in the white pages for him. I would rather not send it to someplace a long ways away.. Any input?.........Thanks.......................MO
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