Thanks again Sam!
Unfortunately for a noise localized in the area where the gearbox goes in to the tub,you either have a problem with the tub bearing or something stuck between the spinshaft on the gearbox and the basket drive hub or bottom of the tub INSIDE the tub. If the noise is unbearable, prepare youself for some real work here. For checking UNDER the spin basket for something stuck there, remove the top panel by removing the screws located at index 385 on the digram which is an L-shaped clip holding the top on to the front cabinet, then pull out and up on the top panel and remove it.
Now you have access to the top of the tub assembly. You will need to remove the tub ring, which is index 329 on the second diagram by unsnapping it all the around the tub. Remove 327 and the 300 agitator as well. to remove the agitator, grab it at its base and pul FIRMLY upwards to unsnap it from the agitate coupler at #310. Now remove the bolt from the coupler and pull it off. At this point , it helps to have the special GE tub spanner nut tool so you dont damage it taking it off and putting it back on but you need to remove the spanner nut at #325 so you can then pull the basket off. Once off, you will be able to inspect the area where long debris FREQUENTLY gets trapped and causes noises and leaks, either one or both.
If nothing there, you need to remove the tub assembly from the machine completely to gain access to the gearbox, which must be removed to inspect and/or replace the tub bearing. It is bolted on the bottom of the tub. now you will need to remove the gearbox from the tub. It can ALSO be from the machine. To do this, remove all electrical connections from the motor and pump and the air hose from the pressure switch where it connects to the tub , isolating the tub assembly completely from the chasis and console, then lifting up on each corner of the tub near the bottom to unhook each one of the four the suspension rods , which will then free the tub assembly so you can remove it completely from the machine. Flip the whole assembly over and you can unbolt the tub from the mounting pedestal and remove the entire drive assembly from the tub, and the tub becomes free so you can replace the bearing. All of this sounds alot harder than it really is , and i would be more inclined to believe there is something stuck inside the tub before I would believe the bearing failed, but both are common and will produce similar symptoms, although something inside the tub will MANY times also produce a leak because the tub seal is in that area as well. Please let me know if you need further information on any of this .