Voyager Spacecraft 8-track Drive and other instruments 40+ Years still operational

The functioning instruments aboard the Voyager spacecraft still going strong.
Although technology on Earth has advanced dramatically since the Voyagers were launched, the two spacecraft are frozen, technologically speaking: They were sent on their missions with the best equipment available at the time (including an 8-track tape recorder for data storage, believe it or not) and they have stood the test of time. While time moves forward here on Earth, aboard the Voyager spacecraft it is always 1977.

Source: Forty years and still going strong