Technical Running an automatic transmission with just an air cooler.

I take the floor cover off in winter and use the trans as a heater.
Only one it has

 

Better quality parts ,fluids, bigger engine compartments to dissipate heat,
Around 93 ish heating problem

 

In one of my 32s sedan thats what I do

 

They are simply wanting a minimum operating temp as well, trans will always be at least close to engine operating temp if using the in-rad cooler.

 

As has been mentioned, if you add a bypass thermostat to a fan cooled remote cooler you have both the warm up and cooling covered. Derale makes them to go with their coolers, as does Perma-Cool and others.

 

As did the Corvair and early Pontiac Tempest when equipped with the Powerglide transaxle. If I recall they just left the converter hanging hanging out in the breeze outside of the tranaxle case.

 

False. Target transmission fluid temperature was 275 degrees max during cooling system development validation at Davis dam thirty years ago. I recall they (Ford) bumped that in later years.

At the time, transmission fluid was stable at those temperatures, and I suspect modern synthetics have extended that upper end limit.

 

BowTie is adamant that they won't warrant any OD tranny running over 160F in the pan. Temp in the torque converter is a lot higher than that on occasion.

 

In 1983, I bought a new Chevy S-10 Blazer 4 x 4/w 700R4 transmission. Although I never took it off-road, and never towed with it, the transmission went out 3 times, the last of which occurred soon after the 5-yr, 50,000-mile warranty expired. After it went out the first time, I installed an aftermarket transmission cooler, the installation of which did not void my warranty; it also didn't prevent the transmission from failing twice more.

After the transmission went out the 3rd time, my brother's best friend, who was a mechanic at a Ford dealership, pulled the transmission, rebuilt it, and reinstalled it for $700. I soon thereafter sold the S-10/w 58.000 miles on the odometer.

Several years later, I saw the Blazer in a Carl Jr's parking lot. I went inside, found the owner, and asked if she had had any transmission trouble. Although it then had 170,000 miles, she said that the transmission had been trouble-free, but the engine was burning oil.

My point: build the transmission right; if you don't, no cooler is going to help.

 

Remember the old 4 speed hydramatics had no cooling. Of course most of them died by 50000 miles.

 

I daily drove a 3000lb Truck with a th350 with only a frame rail cooler for nearly twenty years.

 

Had to look up bow tie. Thought that was a member here

they rebuild transmissions, makes sense for them to want the trans cooled like the OEs did for warranty issues.

my bus doesn’t run a rad cooler. Never has. But I have zero warranty anyway.