I have a Bosch SHU4302UC. It was very quiet the first few years. Now, at seven years old, it is making very loud vibrations. The vibrations come on strong at the start of each wash/circulate phase. After a minute or two, the vibrations fade into near silence. I cleaned out the water intake at the bottom of the tub. I've run a cup of vinegar through it a couple times. I've removed it and checked the water & power line routing. A reputable repairman said it sounded like the main pump.

If not the pump, what might it be?

To troubleshoot further and repair, I feel I need to get to/into the pump. How do I get to the pump? When I had the d/w out, I tried from both the plastic base and inside the tub. I have the part assembly images, but cannot see how to get into the bottom. How do I remove the base?

TIA

Hmmpf

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ya know I have seen a few of these..you might wanna check if that noise is comming from the water valve sometimes those diaphrams will make a noise when they get weak ...

Mine has just started making a stsrange vibrating noise about halfway into the wash cycle. If I turn the power off the noise continues. ANy ideas???