Hi all. New to the forum and soaking up the info around here. For a little bit of background, I've been running my '94 F350 4x4 SRW Auto IDI for a few years and love it, but am now moving on to a '97 F250 4x4 Auto PSD extended cab long bed. The new truck has 236k on it, and the previous owner said he did a new filter and fluid change on the tranny about 6k ago. The truck shifts well, but started throwing a transmission code P1728 (slipping). This only seems to happen once it is warmed up after a few miles. It also does not seem to set the code if I drive it with overdrive off. I am leaning toward a torque converter issue, but am wondering if it is worthwhile to pull the valvebody, replace the converter solenoid and put it back together to rule that out before yanking the whole tranny. Also, what is everyone's feelings on the Transgo tugger kit? They seem to get favorable reviews, but is it worth doing at the same time I do the solenoid? Thanks!