Since installation, I have had intermittent grinding noises that I have now isolated to the gear connection between the TN-580 cartridge and the DR-520 drum unit.

It did not fit properly, and the printer made some grinding noises

When we put the brand new toner into the MFC device it made horrible grinding noises.

The result is the teeth skipping and hence the grinding noise.

I like the product, not the price although about 25 percent less expensive from the box stores

I like the product, not the price although about 25 percent less expensive from the box stores