Hopefully it isn't the issue I had with my 2012 FFE (spider gears took a dump). I will do post on here pretty soon, but longy story short I bought a 2018 motor/tranny assembly from https://www.car-part.com
for $350 (came to $650 total when shipping is included. The 2017-2018 assembly has stronger internals than the 2012-2017 model years, it all bolts up/ sits in the same. I just searched for 2018 Ford Focus transmission, and chose the EV option. Most salvage yards ship the motor, tranny, DC junction box, water pumps, etc. all together since they all sit/are bolted on the blackframe. BUT even so, make sure to ask for a pic of what they are sending you if the pic isn't provided on car-part yet, as some salvage yards got smart and figured out that you can separate the motor, tranny , and inverter from each other
) and swapped it into my 2012 FFE. The only necessary pieces I kept from my 2012 was the black subframe piece(still using the DC junction box and other accessories that came with my car, not the salvage one. Now I have spare parts
), "extension" for the passenger CV axle (my motor assembly I bought did not come with that extension that goes through the motor to connect the CV axle to the differential. The driver and passenger FFE CV axles are roughly the same length, but their is literally an "extension", for the passenger CV axle that will be needed. Or just clean up your extension and use it in the new assembly) and the TCM/inverter, as your car keys, TCM/inverter, and BCM are linked together by a "key code". If you were keep the 2018 TCM/inverter on the 2018 assembly, it would still be linked to the salvage car it came from, and you wouldn't be able to drive the car. Anyway, I had a weird knocking noise when driving below 20 mph, and the slower I drove, the louder it would get. Along with that, regen activation was much harsher/jerky, especially in L. In stop and go traffic or cruising to a stop in a grocery store parking lot (once again low speed driving below 20 mph), regen in L would literally cause the entire motor assembly and car to start bucking until I came to a stop. Shifting from Park to drive, Park to reverse, and reverse to park was also really harsh, and sometimes would take longer than normal to shift into gear. Fast-forward a couple weeks of dealing with this, driving out to my Grandpa's house, I heard a Subaru style transmission explosion come from the front of my FFE and lost any ability to drive the car
. 3-4 weeks of saving cash and waiting for the assembly to come and 10 hours of work later and me and my Dad got the FFE back on the road. Shifting between the gears is smooth as butter and much more responsive, and no more harsh regen jerking.