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'71 Tach Went Inop

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Old May 18, 2009 | 08:08 AM
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Default '71 Tach Went Inop

Back from the big Car Show week with pix to follow in another thread later.

Tach went inop at some point.

Haven't even started looking into the cause yet.

What have the rest of you guys found to be the problem when your Tach stopped working?

Cable? Head unit? Gear on distributor?

Mark
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Old May 18, 2009 | 08:57 AM
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Either the cable drive gear, or the distributor shaft gear, or both. In my case is was both, so I replaced them.
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Old May 18, 2009 | 08:58 AM
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This was years ago, but the gear was stripped in the distributor. The gear on the distributor shaft was also stripped so I needed to buy both parts. On my 71 there was a button inside the body of the distributor that was also worn and needed to be replaced. I understand this button provides the proper lash between the gears and when the button failed the gears went next. Hope this helps. Good luck.
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Old May 18, 2009 | 12:33 PM
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Just remember to look at the simple solutions first, is it unplugged, did the cable come loose, is something in a bind, etc. Think KISS, (Keep It Simple Stupid), no offense intended.
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Old May 18, 2009 | 12:37 PM
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Cable...
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Old May 18, 2009 | 01:00 PM
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Mine stopped last summer (suddenly) Was loose at the distributer
Hope yours is that easy!
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Old May 18, 2009 | 01:38 PM
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IMO cable driven tachs are a POS from the git go, with NO way to ever fix reliably, just like speedos tend to over indicate so will a cable tach...there basically is nothing to do about that fact....

IMO, replace with a HEI dizzy and a '75-77 tach, it's about all you can do....

unless you buy decent aftermarket instruments...that's a solution...

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