Ok guys, I recently bought a 1997, 2wd, 1500 Clubcab, 5.2, auto, with a 3.55 posi. I plan to use this truck to pull a 3000 pound pontoon boat about 30 miles each week in the summer and one or two 300 mile, or so, road trips each summer. The truck has 168000 miles on it, with the tranny being an Aamco rebuild with 100K on it. I plan to change the filter and replace all the fluid with ATF+4, and add a second trans cooler. I will also add a temp gauge to monitor trans temps and try to keep them under 210*, and I will tow with the OD off. Can any of you suggest anything else to do, or anything I should do differently, to try to preserve this old trans? Also, how can I tell what trans I have and are some better than others?