Besides the classic G1 transformation sound. Blackout's turbines winding down, which suddenly slows then alters into a "wrong for a helicopter" sound. Prime when ever his diesel engine sound could be heard. The whirling gear sound of Prime's drivetrain just before he takes a step and touches turning tires to the ground with a "chirp". Frenzie's sound track straight from the movie Gremlins. The "Ka-ching" of Prime's sword being stored and the right hand making it's re-appearance. Anybody else?