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Original Cars and Details / Re: 1969 Z28 time capsule
« on: January 21, 2024, 10:51:44 PM »
If we can more pics of this car we will consider moving it to the Original Cars and Details section.
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I am not trying to figure out why they were offset or inline, I am only trying to find out what is the correct driveshaft for a 396 4 speed 69 Camaro. I emailed Jerry M but he is in Scottsdale for 2 more weeks. He said he would reach out to me when he returns.
The LEGENDS book on pg 59 says all BB cars came with inline driveshafts weather it is a 4 speed or Auto 400. The colors according to LEGENDS do not match the CRG driveshaft chart either. I feel that the CRG offers more detailed info than 1 sentance on pg 59 from the Legends book.
Does anyone have proof in regards to offset vs inline?? Or is the section in the CRG under driveshafts all there is to offer?
If so what would you do, follow the CRG or listen to the LEGENDS book? I am stumped.
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I agree - there could have been a vibration problem in the drive train. Offsetting the yokes to “fix” a drivetrain vibration problem would have been an inexpensive course of action.
If that was the case, then nothing was “fixed” - just band aided - with what was possibly a drivetrain vibration issue shifted to something else. The drivetrain only had to survive long enough to finish a Trans Am race or last past the warranty period.
It would be insightful to know - over the years how may transmissions (aluminum cases) and rear ends have failed due to the induced stresses and torsional vibrations originating from offset propeller shaft yokes operating under heavy acceleration, load, and higher rpm’s.
Just because Chevy did it doesn’t make it golden.If you guys have time, read the full report.
We researched this for over 10 years.
I have read the full report. It is a very good report for documenting what Chevy did. However, there is nothing in the report that states why, gives a reason, or an engineering explanation for why the SB driveshafts had the yokes clocked at 32 degrees.
And by the way, I have been researching mechanical engineering principles since 1971 (53 yrs) and have been a registered professional mechanical engineer since 1980. I have more than a basic understanding of how a propeller shaft operates.
Richard
I should of ststed that my driveshaft in my 04C car if OFFSET with original spot welded weights on the tube of the driveshaft.
Here is the D bumper pics. Best I can do with my old phone cam.
I have a believed original 67 SS hood that I will try and dig out in the next couple of days and get pictures, could you PM an email address to send them to or would you rather me just post them on the forum?
Here is my pic