Well, the Chevelle is D.O.A.....

[Lynn]

You say thank you and move on. No need for any awkwardness.

I had some very close friends (H&W) back in the 70's who were in the ministry. I would offer to buy their lunch from time to time. They always declined. One day I told them: "you know, I think the only thing that would keep you from accepting a gift from me is your pride" Wife said: "After further thought, we graciously accept. Thank you."

We all need help from time to time, in many different ways.

[SuperNovaSS]

I'm very sorry to see this Eric. I'm still a bit confused what caused this. Was the driveshaft simply out if balance? It seems like the driveshaft had very little load on it other than the high rpm since it was off the ground. Thank goodness the driveshaft didn't pop the car off the stands.

Jason

[Charley Lillard]

OMG...I sent a donation. You all have to watch the video. It spits the driveshaft and Eric simply says "Found it". That sucks but I got a good chuckle out of that. I guess you found the vibration.

[Charley Lillard]

Just watched it again and I am still laughing at your comment..... sorry for your plight but you did make it funny.

[VintageMusclecar]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Charley Lillard</div><div class="ubbcode-body">Just watched it again and I am still laughing at your comment..... sorry for your plight but you did make it funny. </div></div>

A form of gallows humor, as it were.

[VintageMusclecar]

The diameter of the shaft was the issue. The 3&quot; shaft went past it's &quot;critical speed&quot; which is the point where the shaft begins to &quot;jump rope&quot; in the middle. What threw me off was I was experiencing vibration several hundred rpm lower than the critical speed chart says it should've been.

Since there isn't room for a 3 1/2&quot;+ steel or aluminum shaft, I guess I'll have to bite the bullet and go carbon fiber.

It's that or put everything back to stock, sell the car and go from there.

[Charley Lillard]

So you are saying another 1/4&quot; won't fit ?

[VintageMusclecar]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Charley Lillard</div><div class="ubbcode-body">So you are saying another 1/4&quot; won't fit ? </div></div>

Nope. Due to the big oil pan I had to raise the engine up on the mounts which screwed up the driveline angles (which I had resolved to within 1/2° of perfect) which required jacking up the back of the trans to compensate--goodbye tunnel clearance. I could barely get my fingers between the pinion yoke and the trans tunnel.

3 1/2&quot; <span style="font-style: italic">maybe</span> if I dropped the trans down some again, larger, no way.

[Kurt S]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: VintageMusclecar</div><div class="ubbcode-body">Nope. Due to the big oil pan I had to raise the engine up on the mounts ... </div></div>
Why run that pan? Seems like there should be some other pan options that keep the driveline angles correct. Cheaper than the fancy driveshaft!
Then again, what do I know about Chevelle engine space - nothing... [img]<<GRAEMLIN_URL>>/smile.gif[/img]

[VintageMusclecar]

And thank you.