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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2004 Posts: 191 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 191 | Still fighting with Speedo in my 56 TF. Got another speedo head from a rebuilder and put it in. Won't get above 30 mph. I'm thinking it must be bad, so I put the old #2 unit back in after cleaning and oiling and it won't get above 30 either. Now I'm thinking that the cable must be the culprit, even though it is new and greased. Is it possible that the end might be loose and not staked properly, allowing it to slip at a certain rpm? Am planning on pulling the cable this afternoon. Have to go shopping first and will pick up a universal cable repair from my FLAPS. Any ideas or comments? This is driving me crazy! | | | | | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | Check the condition of the square hole in the drive gear in the transmission tailshaft. If the hole gets rounded-out, it won't turn the cable the right speed. It's also possible for the square shank on either end of the cable to wear to the point that it slips. I always replace both the inner cable and the housing as a unit, as internal roughness in an old housing can cause erratic cable speed, speedo needle shudder, etc.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The gears in the trans. may be worn down & barely makeing contact.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: May 2004 Posts: 191 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 191 | I hope not. They are new also with only 600 miles on them. | | | | | Joined: May 2004 Posts: 191 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 191 | Got the speedo working properly, but still have needle bounce. I noticed that my cable end that screws into the speedo head wobbles as it turns. Apparently it is not concentric or aligned with the cable axis. Think I should replace the whole cable assembly? | | |
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