I have a 1989 chev 4x4 700r4 tranny is overheating. I believe there is a breather on top of the tranny and it's getting hot and blowing fluid out the breather. Short trips is fine its just long trips when it gets hot do not have a gauge but it gets so hot you cant even touch it. Just flushed it and changed fluid and filter( thought maybe something was plugged in the system so it wasnt cooling). Drove couple hundred miles and fresh fluid was burnt badly again. Took off return line started engine and fluid ran through radiator and trans cooler and back out so nothing is plugged in lines radiator or trans cooler its all circulating. Fluid was pumping out plenty fast too so pump must be pumping fine. As far as transmission it dont slip shift funny or anything, works great. Any ideas? Thank You