Even if the mass driver somehow survives the first salvo, the gunner has time for maybe one shot before the Thunderjaw fires again. It has no need to close the distance, so why would it? The AT-TE can’t even return fire because its remaining forward laser cannons are mounted so low on the hull. With the mass driver gone, the Thunderjaw is free to rain down missiles on the AT-TE as fast as it can reload its launchers. I’d say 9 times out of 10, the mass driver is knocked out either because a critical component is destroyed or the gunner is killed. Unfortunately, the open gunner’s seat of the mass driver works against the AT-TE, because it leaves the gunner exposed to fire. Upon reaching the AT-TE, all 16 disc missiles hover over it before hammering it from above. Once that happens, the Thunderjaw then fires its entire salvo of missiles at the AT-TE. And because it’s radar, it works at the speed of light, meaning that the Thunderjaw always sees the AT-TE first, and reacts accordingly. Ironically, the AT-TE’s height works against it here, because the radar would see it long before the AT-TE would see the Thunderjaw. Really, all the Thunderjaw has to do is wait for the AT-TE to lumber into range, and its radar would see it clear as day. The first thing the Thunderjaw would do is stop in place and scan the area with its radar.
The AT-TE only has the sights of the mass driver for vision, while the Thunderjaw has its back-mounted radar. At first glance, you might think that the AT-TE would have the spotting advantage because of its slightly taller height, right? Well, you’re going to be wrong.