Hello, I am new here. I am looking for help with my 02 4runner (Automatic transmission). I got a P0755 code (shift solenoid B) and an issue with the reverse gear. The reverse issue is random (sometimes, reverse work sometimes it doesnt engage). There are (3?) solenoids. I am planning to change the solenoid but unsure if I should replace just 1 solenoid or all of them. I am also thinking of what solenoids to buy - like the brand (aftermarket) or does it need to be a Toyota OEM brand? Also, after searching, people said replace the filter since I'm working in that area (any recommendation?).

Thanks