P0600, Limp mode, ER HC, ER SS

2008 Outback 2.5i Limited w/ VDC. When I put the car into drive it moves forward but when I press the gas it just revs, it will accelerate under its own power and allow some throttle response once moving but if I give it too much gas it just revs higher. This is especially problematic when making a sharp turn, causing the car to be undrivable on public roads.

Background on the car: The guy I bought the car from said it needed a transmission. I found it had the WRONG transmission in it (one without VDC, code TZ1B8LFEBA) so I replaced it with the proper transmission (with VDC, code TV1B8MFEBA) and got 1,500 miles out of the replacement. I was driving, made a turn, the car revved without acceleration for a few seconds and slammed super hard into gear and threw all the dash lights. I limped back down the highway about 3 miles to my shop and that was that. Scanned and had a code for a pressure control solenoid (can't remember exact code) and decided to just replace the trans again.

I installed the next used replacement, and the first drive seemed like a big improvement until it got up to full temp and started doing the things mentioned in the first paragraph. Last time I scanned it I had codes C0045, C0022, C0052, no Pxxxx codes stored in the ECM or TCM. I figured there's no way this thing is just spitting out trannys so I replaced the TCM and it's still not fixed. Fluid level looks good and no noticeable faults in the wiring. Where else do I look or how do I go about about testing things? Any input is appreciated.