No, you can’t use a TN660 to replace a TN760 as both toners aren’t compatible with the same set of printers. The Brother TN760 is a new upgrade for the TN660, a new release of the v4ink. The TN660 black toner cartridge delivers consistent professional-quality prints with a 3,000-page yield. The BrotherTN760 black toner cartridge works with your Brother printer to create crisp mono laser prints that last over time. TN760 is for use with HL-L2350DW, HL-L2390DW, HL-L2395DW, HL-L2370DW, DCP-L2550DW, MFC-L2710DW, MFC-L2750DW, HL-L2370DW XL, and MFC-L2750DW XL.