camdawg

I have a lx 470 Iam a car dealer and know my car inside and out.I have taken it to my mechanic to get he rack pinion replaced. now the steering is hard at times. Thought to be defective rack, put another one in same issue. Does it need to be calibrated or anything special for it to work. Every dealer gives me a different answer.I don't have to buy a special rack do I? Any help with this would be great