Stop in for a cup of coffee

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If you mean vibration wise...its fine. This is definitely a driveline vibration...and a violent one at that....
 
Coffee time. Boy I didn't sleep well. Woke up about 3 and didn't fall back to sleep until after 5. It will be nap time this afternoon.
 
Wonder if the balance is off. Unless it is ready to fall out the back it should not cause a vibration. Think of it as a cocked yoke? Also if you let off the gas at speed the driveshaft is still moving also, Frank any ideas?.
Hey did you change the flex plate by chance?
 
It's

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Monday.
Good Morning. :D
 
Had the radiator rebuilt in the 59 Fury. Reinstalled it but need to start it up and check every thing out. Then the 66 Barracuda, replaced the water pump this winter, rebuilt carb, and had Ray rebuild distributor.Need to start and check things out
goldfish65 said:
Hi Pete, which one's first on the list, your Sweptside?
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halifaxhops said:
Wonder if the balance is off. Unless it is ready to fall out the back it should not cause a vibration. Think of it as a cocked yoke? Also if you let off the gas at speed the driveshaft is still moving also, Frank any ideas?.
Hey did you change the flex plate by chance?
Click to expand...
When I had this driveshaft done it was balanced, trans is fresh, new converter...it did this before I had driveshaft made, and before the new torque converter...
 
oK then its not the driveshaft if it did it before. I would check if the flex plate is the right one for the engine first (internal balanced or external) and also if it threw a weight. You sure it is not a suspension issue like a un balanced wheel? I had a weird one years ago a weight came out of the front rotor kind of acted that way. Just ideas
 
It's hard to capture but cool in person, 2 times a year when the sun is right, it shines in our east window, down the staircase and reflects off the chandelier in the dining room. No crystals there just bevel cut glass so no real good rainbows.

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halifaxhops said:
oK then its not the driveshaft if it did it before. I would check if the flex plate is the right one for the engine first (internal balanced or external) and also if it threw a weight. You sure it is not a suspension issue like a un balanced wheel? I had a weird one years ago a weight came out of the front rotor kind of acted that way. Just ideas
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I know it's not the flex plate, car has new tires freshly balanced. If the driveshaft that was in it was too short to begin with...then when I had this one made then I just repeated the problem...that's why I point towards the driveshaft
 
Seems like "too short" making it vibrate violently there would have to be just a small percentage of the yoke engaged on the output shaft allowing some misalignment. It would take a whole messa suspension movement to draw it out that far.
 
plymouth67 said:
When I had this driveshaft done it was balanced, trans is fresh, new converter...it did this before I had driveshaft made, and before the new torque converter...
Click to expand...
Pinion angle? I have a GOOD video if I can find it. BRB
 
Would just suck to get anther made and the same issue. I remember a speed shop that had a drive on dyno and they used a strobe light t find issues like that. Those days are over.
 
Pinion angle.
Tremec has an app to measure with the schmart phone...
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I don't know the magic number but a yoke the isn't far enough into a transmission tailshaft can cause vibration.
 
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