That bump in the front of the drum is the operating thermostat. GE advertised that with the new Hi Speed design dryer, the thermostat was not in the exhaust air stream, but right in with the clothes. This dryer's timer that goes up to 130 minutes in the regular cycle means that it could be used on 120 also, probabaly even with the PP cycle, too. Most GE dryers had only a one temperature thermostat, but when you selected low heat, only one of the two heating elements was energized so the temperature did not rise very high before delicates were dry. It is interesting that for many years, their TOL dryers did not offer a low heat setting and the Delicate setting on the auto dry cycle was usually criticized by CU as reaching temps maybe a bit too high for temperature sensitive fabrics. GE made some sort of change though because in the early years of the auto dry cycle, they said that delicates were dry in 8 minutes, but they later changed the ads to say that delicates were dry in 15 minutes. I guess they felt they were safe with the Delicate setting being so close to the cooldown at the end of the auto dry cycle that things could not get damaged by the heat if they were wet when they went in.