69 Barracuda Clutch Shake Help Needed.

TimS said
I'm sure the transmission is original. I texted the guy I bought it form on Saturday and he said when he put the car on stands 15 years ago I did not shake like it does now. I did add some aftermarket shackles to the car to raise the rear an inch before I put the new clutch in. It did still shake with the stock shackles but it still had the old clutch in it. I guess that is something to ponder.

Angle should be somewhere between 5 and 7 degrees negative. The angle finder I ordered should be here today so I'm anxious to see what that ends up being.

The previous owner in his pics showed the car on stands. It had been that way for years and the rear stands were supporting the rear axle housing at each end it appears. Just a thought, but sitting that way straightening the springs out maybe changed the angle a bit.

The issue you are describing is actually called clutch chatter. Can you post a picture or two of your clutch linkage? Also, curious how you verified the motor and trans mounts were good, especially the driver's side. They can look perfect, but be completely broken.

Longer shakles are not the proper way to raise the rear of the car. Fresh leaf springs are relaticely cheap. It's important to lubricate the rubber pivot points ie shakle bushings, shock mout bushings etc with synthetic disc brake grease. It allows the suspension to move much more freely b reducing sticktion at those mounting point. It noticibley enhances how smooth the suspension works.