Many years ago I removed four metal cylinders from each inner fender on my 400 vert. They did not have any attachments (electrical or hydraulic) to indicate their function. They are heavy as he**. What are they for? Yes, I saved them... I took them out to reduce weight as I street raced it in the early days... Shirl Dickey
They are harmonic dampeners to help limit vibration induced by the convertible design. They are filled with automatic transmission fluid. Commonly known as salt shakers. They can be very expensive to replace since thy are not reproduced that I know of.
The dampener has a steel ball between springs and filled with an ATF fluid. Wish I had saved the dampener "cut open" picture I saw many years ago. 1st Gen Camaros and Firebird converts used them but the Corvair converts had them in the mid-sixties.
Jim 68 400HO Conv. '69'73'81'10 The '73 and '10 are the same spot and the same car 37 years apart.
I had the car in an all Pontiac show 20 years ago and a Pontiac expert (friend Mike Brammer) asked me where they were. I said I was not sure, I think I threw them away. He said 'I hope you didn't they're worth $1000' (in 1996). I went looking for them when I got home and found them in an old milk crate. Then I remembered I threw them in the trash and then went back and dug them out and and saved them in the milk crate...Lucky or perceptive? Not perceptive enough, I didn't save the exhaust manifolds and PMD spoked hub caps... I'm betting they are also hard to find. Shirl Dickey