and apparently as you STATED you dont know what youre doing or looking for I worked for a Sellick dealer for ten years and worked on many of the brake systems on these units and ULTIMATELY there is brake lines and fluid that goes to the brakes that are internal on this unit. So have fun figuring it out but I will tell you what the problem probably is and was fairly common in those. The end clip on one of the clutch pack shaft rings breaks off cutting a gouge in the housing and you get pressure bypassing acting like the brakes are dragging the only way we found it after we found no problems with the brakes was to break the tranny down. So have fun ***.