my 92 had a Subaru add-on external filter mounted under the battery. I replaced it with a Perma-Cool spin-on mount. The Perma-Cool mount has a spot for a temp sensor sending unit. Since it is mounted about a foot from where the ATF exits the tranny it's a good temp reading. I use a Fram "X2" spin on filter, good for 7000 miles, I have no problems with line pressure, I have an ATF pressure guage mounted between the spin-on filter & the ATF cooler. The tranny shop that installed
synthetic ATF for me agreed that the X2 filter changed every 7000 miles is a good thing, "stay'n alive, stay'n alive"...
David