I have a Riso GR 3750 and have a T 2 and T1 error and can not pull out the drum (we don't get a green light) we also tried shutting down while holding the reset button to no avail. when we accidentally pressed the start button there was a VERY LOUD stripping noise like the gears were smashing with each-other (like something that was supposed to turn wasn't turning and the gars made a crunching loud tripping noise)

The syncronicity of feeding mechanism and drum is lost. The sound was the jumping of the toothed belt.
Seems that the stripping finger or the blower is stuck in the clamp mechanism blocking the drum moving forward. This problem can be caused by a worn rubber reel. So the stripping finger is not lifted enough any more.
Remove the back cover. Locate and check the rubber reel running at the excenter of the print drum. Do not turn the machine in forward direction till this is solved. Else you may damage the clamp mechanism.
To restore synchronicity you have to remove tension of the toothed belt by loosening the 3 screws around the paper feed clutch. Turn the mechanism clockwise and fix a screw temporarily in this position. Now it should be easy to lift the toothed belt over a tooth, moving a bit, and so on. You have to move the drum driving mechanism till the sensor there meets the small hole. At this position the sensor at the paper feed mechanism should match the cutted semi-circle. Synchronicity restored. Restore tension at thoothed belt and test.