I got a 850 94 NA with 254000km and had power steering fluid leak... I investigate and find it came from the rack. I put some degreaser to clean the rack and watch every 2 day to found from where it came on the rack. Finally, It came from the top of the rack, where the steering collumn attach. There a seal + dust cap that prevent oil to get out and dust/water to get in, this is a 15USD part and need to remove the universal joint inside the car (on the steering column) to detach the steering column from the rack. Then change the seal and no more leak. No need to remove the rack or subframe.

Bruno