After the crash, I replaced both A-arms, the axle, the toe link, both front shocks, installed P3 rockers, and the rocker arms that are suggested for it. The crash ruined the Tekno swaybars, so I removed them. and I changed wheels and tires all around to Proline Road Hogs, I even replaced the hinge pins, because it had snapped the long one in two places. Also, the cross member that the servo saver connects to was broken in half, so I replaced it and the hinge pin retainer that bolts on in front of it. I also replaced the front bulkhead, because it blew into 6 or 7 pieces, rebuilt the tranny with hardened steel Robinson Racing gears, and put a whole new differential in the bulkhead, including 90 weight Losi silicon shock oil in the carrier. I'm not saying that the servo got damaged by the impact, I'm saying the servo may have been the reason why I hit the light pole, because it wasn't tracking accurately. I re-installed the Spectrum Racing Servo, and it tracks great again. As far as the servo hum and my experience with servos, a hum means that if you have two or more servos doing the same job, as in twin servos for your steering, they are fighting each other to stay centered. With one servo as the steering servo, it means that the servo does not have the power to center itself, and so it hums as it constantly tries to center itself. And, if you have any other explanation, I'd like to know where you got your knowledge from, it for sure wasn't from RC experience.