Re: Fan is incredibly loud...
The SRT has a single speed fan motor. The speed is controlled by switching power supply that varies the applied voltage to control speed. I have monitored some of this and seen that the control gives about 4 volts to start and can go up from there. Near the 12volt range of operation, the fan makes more noise than than a Saturn rocket.
If your speed of the fan is too high under normal heat conditions, the fan controller may be too going around the bend and need replacement. The controller is the box with the fins on the drivers fender.
Woody