I’m now expert, but there are some things that I’m scared to skimp on. Things involving brakes fall into this category. I’ve been burned a few times.

 

Usually, the only time the solenoids go bad is when they get contaminated with "sludge" due to the engine coolant/ATF cross-contamination that occurs because of the "infamous" radiator integral trans cooler failure. When AT solenoid codes trigger that are not due to the cross-contamination issue, many time it's not the solenoid but the pin track for the circuit that cracks and breaks. The YouTube vid I linked below gives a lot of good information regarding the RE5R05A valve body. At around 15:00, it will show a picture of a broken pin track and discuss it. These pin tracks can be repaired with some competent soldering:

BTW, I believe your Pathfinder has the 20-40 Ohm (a.k.a. "High Ohm") Low coast solenoid. The "Low Ohm" solenoid was used in Infinitis, only, if I'm not mistaken. Cobra Transmissions should have that part, if you need it:

https://cobratransmission.com/solenoid-nissan-re5r05a-epc-1107013-1