Detroit® DT12® Adapter The 8-bolt adapter allows you to mount one of Bezares’ popular 8-bolt PTOs, including the 2000 (standard duty), 4100 (medium duty) and 8500 (heavy duty) series, to the bottom location of a DT12 transmission. These PTOs are typically used for heavier-duty applications including large blower or vacuum systems. This adapter is only designed for two or four positions and will mate with PTOs with the input gear #01 installed on the Detroit DT12 C and D box transmissions.