ok its a gasser, but it has an Allison, 2001 2500 HD with an 8.1L. trans seems fine, shifts fine, pulls fine, color of fluid looks fine. smell of fluid seems fine. runs about 190 deg unloaded on a warm day. Pull with is and it gets warm, most the time around 200/210. pulled yesterday about 10k lbs on a 90 deg day, climbing a big hill she got close to 250. pulled over let it cool down, finished drive home about 20 miles,, it did get just a bit over 200 but all seemed fine. fluid still looks smells good and shifts fine, no slippage. 140k miiles. Any thoughts on what to do?