Still not seeing the logic in turning a snap in/bolt in factory setup into a hack job when aftermarket kits are readily available.
If you believe a 6' x 11' cooler is enough to handle transmission cooling by itself... I'm willing to try bypassing the radiator cooler in a way that I can easily reverse if it doesn't work out.
And good points Turbo. I do run Dexron 6... should be more resistant to both heat and cold than older fluids.
Now, if your radiator cooler is blocked up with crud, I could see there being an improvement by bypassing it.