Cavi

So I have a 2005 RX8 Auto car. I bought it knowing it had a salvage title and needed an engine, but the body and interior were great and it seemed to drive good all things considered.
I replaced the engine and transmission. The mechanic dropped the whole sub frame and replaced everything (reman Mazda engine).
While we were under there we could see signs that the reason it had been a salvage title was probably an impact to the front driver's side. You could see the control arm and some other things were replaced. The subframe and enverything else looked straight, and when I bought it it seemed to drive straight and well.
When bought it also had a bad vibration in the rear, we discovered bad bushings in the diff mount and a very slightly bent wheel. We replaced the bushings and wheels (went to stock wheels and new tires)
Now the car runs great, no more vibration, however when doing low speed driving like around a parking lot, when I turn to the right, and only to the right and let go the wheel does not snap back like it should. It is sluggish and if I am going straight and I flick it to the right I feel a slight resistance spot. None when going to the left.
Since the sub frame came off for engine swap I took it to the alignment place that does all my autoX cars. keep in mind other than this oddity the car drives great on the road and on the freeway, only a slight pull to the right.
Upon doing the Alignment we found that the Caster on the Driver's side was way off, 18 degrees when it should be at most 6. Also the eccentrics were backwards, we swapped them and managed to get down to 8 degrees. End result I ordered a new knuckle upper and lower control arms and a new inner and outer tie rods, which will be installed in a couple of weeks.
Anyone have any ideas other than getting the caster corrected? Is there any play when reinstalling the sub frame, I ask as I do not remember this issue before the subframe was dropped to swap engines, however the vibration and the bad engine could have masked it as I was more worried about the engine itself.
I personally do not feel that it is rack as it is only to one side

NotAPreppie

Could be a worn u-joint in the steering column.

Cavi

Good point, I'll check that out also, although again one would think that would feel notchy going both ways not just to the right

Cavi

Big update, today the car went in to the shop, I had a replacement knuckle and control arms waiting. The mechanic just texted me a picture of the old control arm against the new one.

https://www.dropbox.com/s/b109y3jbo9...%20AM.jpg?dl=0
added link as the attachment did not want to go!!