^ I second that. I've done dozens of transmission fluid exchanges on cars at several jobs and I've never once had a problem. The cooler lines typically drain back into the pan so they seldom see more than a few PSI and lines and cooler can be cheaper.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"