avalanche runs cool all the time, but it has a BM cooler and is an 80e with a bigger pan.
the farmtruc has two BM coolers, even with no lockup and being a glide, it's at 110 on the hiway and less than 200degs at the end of the track.

get a bigger cooler, that should help, or like they said, another one.

if your transmission temps are getting that hot with only one wot run, it could be slipping, seriously. it takes more than 5 or so to get my transmission heated up like that.

i don't like to see them higher than 190deg.