Aux. electric trans coolers

[Broncobowsher]

One thing that is being overlooked...
That oil to water cooler does wonders for taking the temp spikes. A small oil to water can do what a huge oil to air can do. But the oil to water will work and take a spike even if airflow is poor.

The in radiator is on the cold side of the radiator. So there is no way the water cooling the trans loop will be that hot unless your radiator doesn't work at all. In that case trans temp isn't your worry at the moment.

So if you run an oil to air first. That should get rid of a good amount of the heat in the fluid. Then back that with the in radiator that can take the spikes that will get past oil to air.

If the oil to air is some magical super cooler, running it back through the raditor will help cool the engine and bring the trans fluid back up to correct operating temp. Contratery to many belief, transmission do should not run as cold as possible. They should run at operating temperture. Funny thing, that isn't defined real well. Somewhere between 150 and 200 is generally accepted.

I honestly can't think of a good reason not to run the trans fluid through the radiator before it returns to the transmission.

And if you are cooking your trans fluid to the point you need 2 or 3 coolers, you have other issues. 35's and stock 3.50 gears are probably one of them.

 

[jw0747]

One thing that is being overlooked...
That oil to water cooler does wonders for taking the temp spikes. A small oil to water can do what a huge oil to air can do. But the oil to water will work and take a spike even if airflow is poor.

The in radiator is on the cold side of the radiator. So there is no way the water cooling the trans loop will be that hot unless your radiator doesn't work at all. In that case trans temp isn't your worry at the moment.

So if you run an oil to air first. That should get rid of a good amount of the heat in the fluid. Then back that with the in radiator that can take the spikes that will get past oil to air.

If the oil to air is some magical super cooler, running it back through the raditor will help cool the engine and bring the trans fluid back up to correct operating temp. Contratery to many belief, transmission do should not run as cold as possible. They should run at operating temperture. Funny thing, that isn't defined real well. Somewhere between 150 and 200 is generally accepted.

I honestly can't think of a good reason not to run the trans fluid through the radiator before it returns to the transmission.

And if you are cooking your trans fluid to the point you need 2 or 3 coolers, you have other issues. 35's and stock 3.50 gears are probably one of them.

nope I'm running 35s w/ 4.56 gears. my transmission and engine had overheating problems so I installed my aux trans coolers and blocked the radiator. now both are running within normal operating temps all the time. my Bronco is not street driven. automatic transmissions can operate at temps over 200 but you're taking chances if you do it for extended periods. if you get up to 240-250 shut it down and let it rest. my experience is they cool down quickly.

 

[MarsChariot]

Agree with Broncobowsher that the radiator part is good, especially in the winter, but helpful at all times.
On the other hand, 35 s and 3.50s are close to normal equipment thee days. Certainly 33s and 3.50s. So if the C4s are having trouble with that combination, it sounds like the C4s are probably marginal with 30s and 3.50s. If that is the case, then we all have a much bigger problem.