Engine shakes under acceleration

has the rear trans mount turned to cheese, when they go soft the trans movs left or right under load. the diff doesn't. and you get vibration much like you would with an pinion angle issue.

the 4 pin joints when angled speed up and slow down. same angle at each end the speed up and slow down matches. and all is good. different angle at each end, makes the shaft vibrate as each joint PINGs through the tight bit.

Dave