LG Motorsports LG Diff and Trans Cooler - Manual (Page 5)

Figure 4: Cover plate and pump mounted
This completes the install of the fabricators kit. You must now run your lines, coolers.
**IMPORTANT** The section closest to the diff cover plate is to be used for diff fluid,
and the rear most stage to be used for the transmission. THIS CAN NOT BE
SWAPPED. The pump flows from passenger side to driver side so, both pickups will
enter from the right side of the pump as you are looking at it from the back of the car, and
exit to the coolers on the left side.