I am currently replacing all the fluids on my 98 R33 that has been shipped Japan to Uk, then UK to Mexico. I have no problems doing the rear end, tranny, transfer case, front diff., brake fluid, oil, filter, backflush coolant, power steering... but I have found the rear reservior for the rear steering a mystery. I can't seem to keep the system pumping, except when car is first started, and it only runs for 2 or 3 seconds. I'm trying to power the fluid out by running the pump while the return line hose is pulled and I am adding new fluid to the reservior to introduce new fluid to the system. any ideas?? Is there a drain for the system?