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Distibutor Tach Drive

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Old Apr 19, 2004 | 04:16 PM
  #1  
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From: Austin Tx
Default Distibutor Tach Drive

My tach cable is not broken, but I bought a new one anyway and the damn dist is not turning it! It will turn the cable when I spin the distributor counterclockwise with my hand, but won't turn the tach drive when going the correct direction. Do I just need to replace the small gear and/or could the gear on the dist shaft be bad too...I have heard that these things go out, really don't feel like spending $300+ on a new distributor.
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Old Apr 19, 2004 | 04:19 PM
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Default Re: Distibutor Tach Drive (Gage)

Gage, chances are it`s BOTH gears the one on the shaft usually goes bad when the side goes.. If your interested I have a bunch of them ALL restored in the $225 range..e-mail DOIRECT if interested..redvetracr@msn.com
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Old Apr 21, 2004 | 10:46 AM
  #3  
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From: Austin Tx
Default Re: Distibutor Tach Drive (Gage)

Thanks for the reply Revetracer. Tonight I'm going to pull the dist and take out the coupler and shine a flashlight in there to see it the gear on the mainshaft is bad. If it is, I'll be taking one of those distributors off your hands. Otherwise, I'll just order a new side gear...
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Old Apr 21, 2004 | 11:33 AM
  #4  
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Default Re: Distibutor Tach Drive (Gage)

1971 350/270 There is a dealy at the end of the tach cable where it goes in the distributor that can be put on backwards.
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Old Apr 21, 2004 | 11:54 AM
  #5  
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Default Re: Distibutor Tach Drive (Gage)

Gage, if it is the mainshaft gear that is bad, new mainshafts can be had for $40 -$60 depending on the corvette vendor.

MIke
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Old Apr 21, 2004 | 02:22 PM
  #6  
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Default Re: Distibutor Tach Drive (SLine78)

Get one of these and dump you points. :thumbs:
MSD8572

Great unit and you can recurve it yourself!!!!!


[Modified by theandies, 1:24 PM 4/21/2004]
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Old Apr 21, 2004 | 05:16 PM
  #7  
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Default Re: Distibutor Tach Drive (theandies)

points were dumped already...previous owner switched to petronix unit
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Old Apr 21, 2004 | 09:03 PM
  #8  
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Default Re: Distibutor Tach Drive (Gage)

98% chance that your distibutor drive shaft tach drive gear is bad. You will need to replce the distributor shaft plus the small drive gear at the end of the cable. If you pull the distributor it will be obvious :nopity
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Old Apr 21, 2004 | 09:20 PM
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Default Re: Distibutor Tach Drive (MEAN72)

I HATE! MSD disributors on Vettes. The money is better spent on other peformance parts. My 12.28 sec LT-1 has had it's Delco in for 12K miles and gets the job done! I guess it depends on how much money you have to spend, I use my wisely and kick butt looking stock.
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