Are we talking 300,000 miles or 120,000 miles? If this is the original tranny I would think it is about time for a complete rebuild? Getting 21 years out of a automatic transmission is a great accomplishment. she deserves a nice rebuild tranny if you plan on getting another 20 years out of her.
Not to be dick ... but their are a ton of guys on this site with DCT Focus ... that are 12 years newer than yours.... probably cost 4X as much ... and are lucky to get 2 years before the tranny goes tits up.
You sir have had a great car ... that has lasted over 20 years.
Yes, mileage will determine where to go if you change solenoid to no result. Maybe mechanical damage, not many show that set of events, most do not lose low gear. Have you checked to see if you have MANUAL low gear, 1 on the shifter?
Drive 1 and Manual 1..............drive 1 is low gear with shifter in D, Manual 1 is shifter in 1. That trans can get low mechanically in more than one way. 2 can only go one way but M2 does not shift to 3 like D2 does.
So, here is what I have done since last communication. I've put Lucas transmission oil in, bought forscan and bought a lower valve body pack. I have not I stalled the pack as because I ran some forscan tests and I was unsure if I should change the pack. The diagnostics say the solenoids are opening and closing but the actuators aren't matching what I have as reference for the transmission. Does this mean that the pcm is sending the wrong data as to when to open and close the solenoids? How the heck do you test a pcm. I'm not getting any code or anything. Or could this still be solenoids going out and I should install the solenoids?
I just want to say that after months of trouble, changing out solenoids, using sea foam and Lucas oil (twice), getting stuck in places at inconvenient times, buying the wrong adapter for forscan then buying the correct one, spending countless hours trying to track down grounds in my wiring harness, that I solved the problem by changing out the pcm from a junk yard focus and reprogramming the keys using forscan. What a frigan headache.... Hope this helps someone out there. Good luck!