01 durango leakiing coolant nea trans and inside of vehicle

Most likely cause would be a leaky coolant hose near the engine block. When the car is warmed up and you turn it off, open the hood and look and listen for a hissing or a stream of coolant coming from one of the coolant hoses. If you can't see the source from above, you might need to look from underneath. If you can see where it's leaking, it might be as easy to fix as a hose change. Or it might be something a little harder to fix. But you need to start by finding the source of the leak.

When bleeding the radiator i found coolant leaked into power steering reservoir how would this happen? =============================================
1. Not enough information and you have not identified the vehicle either.


2. Coolant cannot leak to the PS system. They are entirely separate systems and unconnected.

3. If you have an auto transmission then in some models there is a section of the radiator used for cooling the auto transmission hydraulic fluid . IF there is a breach in the radiator between the 2 sections then coolant can flow into the auto trans fluid and vice versa. If you find there is pink hydraulic fluid in the coolant when draining the radiator then it will be auto transmission fluid.

In that event you will need to replace the radiator and to have the auto trans serviced now or the transmission will fail if the hydraulic fluid has been contaminated.

The auto transmissions have lines to the radiator, the core might have cracked and leaks to the transmission line that flows to and from it.

How much "over full"?
(Realize that the fluid level will be slightly higher when the trans and fluid is hot, and lower after when the vehicle has not been running and cold).
If it is only 1/4" (~10mm) overfull, that could account for just normal fluid temperature expansion. Anything greater than that may indicate the following problem.

That said, if the fluid level is significantly higher than normal, there is only one place that can leak "fluid" into the transmission. That would be the rare case where there is a hole in the transmission cooling line which usually connects into the radiator for the engine coolant to cool the transmission fluid passing thru the trans cooling line.
If a hole/crack developed in the trans cooling line inside that location, antifreeze/coolant could leak into the trans line.

Is the trans fluid on the trans dipstick normal colored, or does it appear to be milky with water/coolant intrusion?

your transmission fluid lines run thru the radiator's transmission cooling cell. When the radiator springs an internal leak, it contaminates the trans fluid with coolant/water mix, giving it the milky pink appearance. Replace radiator and flush transmission.

that means trans fluid or engine oil is getting into cooant system. Not good. Either a leaky trans cooler in the radiator or a blown head gasket. Hope it's the trans cooler

Yes, in back of your engine block, there two freeze plugs, these plugs hold water or coolant in the block, to replace these freeze plugs, transmission will have to be remove, if your going to get this done, I would also have the rear main seal replace at the same time, should not cost you much labor to do this, due to if it starts to leak oil from there in the future, transmission will have to come out again, this will save you money and time down the road, hope this was very helpful.

You need to find where the leak is. You don't mention where the coolant is going. You just say everywhere...so...take a look at the water pump, lower end of the block, trans cooler if outside vehicle and heater core if insdie the vehicle.

What exactly is the "round plug type thing" near the firewall [passenger side]? Is it a sensor of some type? I, too, have a coolant leak here on my 2001 Durango; its tucked in rather tightly near the hood/firewall corner. My electric fan is not kicking on; vehicle overheated tonight. (4.7 liter)

coolant leak may be coming from intake manifold gaskets,4.3 is notorius for leaking coolant from behind the mainfold in those years