Sure its the rack? Usually hard to track symptoms are worn joints, steering shaft, tie rods etc. Pulsing is usually pump related. Racks usually just leak when they go bad.
Howe performance racks if you got the coin.
Yeah, I've got play in the shaft too. Trying to eliminate that first and see whats up. Noticed that the wheel is crooked now too. Alignment and tie rods seem to be fine.
On top of all this, the wheel seems to surge or push back a little when i push it off center when I'm parked. Its weird. It has a dead spot where the play is, and then it meets resistance when it starts to steer, then it gets easy. Makes it very hard to not look drunk on the road. I had a sticky/corroded steering shaft u joint 2 years ago that ive kept lubricated, but I guess i need a second person to turn the wheel while i look for play in the shaft.