A friend of mine is having problems with a freshly rebuilt 700R4. Around town it drives fine, but once it gets a few highway miles it loses overdrive and seems to be overheating. It puked some ATF out the dipstick tube last time. When we checked to B&M cooler, it felt hot (really hot) on one side, but cool on the other side. The lines were the same way, in was hot, out was cool. He was losing reverse after the highway drive as well. Could it be a partially blocked cooler? The cooler is a new plate-type unit.