If this is TMI, let me know and I'll try to simplify.
I have a 2003 Cadillac CTS with about 205k miles
I recently had the master cylinder and brake booster replaced. When it was finished, the brakes were WAY too sensitive. At first I just thought I needed to become accustomed to it, but after I drove it for a while, it felt like the engine was fighting the brakes. I knew I needed front bearings, so I replaced those, in-case I was feeling that friction. Road noise was greatly reduced, but still not perfect so I replaced the front calipers. When the car gets hot, it still feels like something is dragging.
During one drive, the car gave me a transmission heat warning. I took it to the shop and they replaced my front brake lines. I also had them do a transmission service and replace the fluid filter.
I still get that dragging feeling when the car gets hot.
I haven't done anything to the rear wheels yet.
What is my next diagnostic step? Would you suspect the rear (and/or parking) brakes, the rear bearings, the transmission...?