Auto Trans Radiator in a Manual trans jeepster

[GoldToyBox]

Your not missing anything you just need decide what's best for you.
Remember that radiator temps can be actually higher than 180 due to the pressure cap..... the PS reservoir isn't presureized. Doubt that the PS fluids get up near the 180 mark under normal conditions .... not sure what the boiling temp is for PS fluids.
More lines/fittings to leak but the cooler & lines add to the amount of fluid in your system.
If you do this, let us know how it works
[img]/ubbthreads/images/graemlins/RockOn.gif[/img]

[NudeJeep]

The pressure cap has nothing to do with the radiator temp in this respect. What the pressure cap does is maintain pressure in the cooling system so that 1) the boiling point of the coolant is raised due to pressure, and 2) maintains pressure so that the water pump circulates the coolant. An un-pressurized cooling system (i.e., bad pressure cap) will overheat because the water will 'cavitate' around the impeller, causing it not to circulate.

The cooler in the radiator is separated from the pressure maintained by the cap. It's an integrated 'tank' that is isolated from the coolant, and designed for heat transfer from the transmission fluid to the engine coolant.

As for temperatures for power steering fluid, they probably run near the 250 degree mark (possibly higher), so it should be an advantage. Look at the older Fords, and you'll see a finned cooler in the return line to help keep the fluid cool.

[img]/ubbthreads/images/graemlins/codger.gif[/img]I'll repeat what I said earlier. Check the temp of your power steering fluid after driving for a few miles. Just get a cheap meat thermometer, and stick the probe into the P/S reservoir. If it's above ~180F, you'll provide extra cooling [img]/ubbthreads/images/graemlins/beach.gif[/img] by routing the fluid through the transmission cooler. If it's around 180, you'll gain more cooling just because of the extra fluid. If it's below 180, you're probably better off not using the cooler.

My bet is, though, that 180 is going to be quite cool compared to the fluid temp.

[jeepstrmanAL]

[img]/ubbthreads/images/graemlins/thumbsup.gif[/img]If the trans fluid is running cooler than the 180 your eng is running it will heat the trans fluid up to the eng temp [img]/ubbthreads/images/graemlins/warning.gif[/img]. If your trans is running hotter than 180 it will heat up your eng over the 180. [img]/ubbthreads/images/graemlins/warning.gif[/img] I am having trouble with this right now [img]/ubbthreads/images/graemlins/spank.gif[/img]. My eng runs at 180 till the trans catches up with it and then when the trans temp catches up with the eng the motor temp goes up to 210 [img]/ubbthreads/images/graemlins/cussing.gif[/img]or more along with the trans. I have gages on the trans and the eng that show this. [img]/ubbthreads/images/graemlins/thumbsup.gif[/img] So I am putting a trans cooler separate from the eng cooling. The 700r runs hotter than the 400 trans. [img]/ubbthreads/images/graemlins/goodpost.gif[/img] That's why I have a lockup on the cluch in the 700r converter, This also gives you stick transmisson compression in the gears except in low gear going down hill in the rough stuff.or pulling a load up hill. [img]/ubbthreads/images/graemlins/thud.gif[/img] Most 4 speed overdrive tranmissions suggest when pulling a load or going up a grade to use third gear or it may burn out your 4 gear cluches shifting back and forth. [img]/ubbthreads/images/graemlins/wall.gif[/img] The torq converter creates all the heat in the trans because of the slipage it gives. It almost always is better not to run it through the radiator and a separate cooler in series as one defeats the other.You don't need the motor to help heat the trans. [img]/ubbthreads/images/graemlins/codger.gif[/img]

[Caver Dave]

Ditto AL!...

And for the record, the tube is 99% of the OEM & aftermaket replacement radiators is just that. For some reason folks think it's a loop(or 2) or some type inside the lower tank... NADA! It's a single tube with with 2 90* bends... one at each end where it goes into the tank, one where it comes out...