I think my trans fluid leak into my radiator and my radiator fluid leak into my trans. I have already replaced tha rad to and it did it again.Does anyone have any tips about this??

 

Does your car have a KC4 engine oil cooler? if so, that might be the problem and your rad is contaminated with engien oil and worse, your engine oil with coolant

 

Have you had this problem before??? And I don't think it is in tha engine oil because I jus got a oil change and I keep lookin at it ...and its not foamy or nothin ... but tha trans fluid looks jus like tha radiator fluid that's why I think they mixed together

 

Did you flush the tranny after replacing teh rad? the friction material is held on with a water based glue, this will give problems.

Only way for the 2 to mix again is if the new rad is bad too.

 

Yeaa I flushed both of them ... and I replaced tha trans fliter

 

but did you flush the converter or just drain the pan????

 

Jus tha pan..

 

That converter holds A LOT of fluid. It could be leftover fluid from the last radiator (the trans/antifreeze mix) making its way into the new radiator.

 

there's your problem, most of the fluid is in the converter. The easiest way to flush it is to buy fresh fluid in large quantities and then tkae the pan off and the filter, hook a hose to the tube and let it suck in clean fluid and let the oild drip down in a large collection bin, then start the mtoor and run it through the gears so all hydraulic circuits get fresh oil, do this until only clear red oil comes out.....or take it to a tranny shop to have them do this.

 

But now its starting to over heat ... I should keep flushin it until there is no more left of tha mix huh ... but I wanna kno wat was tha cause of tha mix in tha first place

 

My guess would be the radiator had a hole in the transmission cooling circuit. Normally they are kept seperate, but if a hole develops the engine/trans fluid mix. Tranmission clutches do not like coolant. You want it as clean as possible. No you don't want to overheat it. Too much heat will tarnish the clutches and you're in bad shape at that point too.

Check your local service shops. The one Goodyear Tire Shop here did a complete flush, new fluid, and a filter for $95 on my Wife's car last year.

 

Yeaa that is wat I think happen to ...so I should keep flushin??

 

Yes or trailer it to a trans shop, they have the equipment to flush it

 

Okay thanks

 

I'm sorry I made this post before I really understood what all was going on.
X2 on taking it to a shop for trans flush. They have a machine which will do a much better job at flushing out all the old coolant than you ever could in your own driveway.

I saw the topic and kinda just started on my post. But I'll leave the rest here just because it might help someone to know this stuff:

Let me give you some basic diagnostic principles to help you locate this problem.

Pull the dipstick of the engine oil AND the Trans fluid. One of those 2 dip sticks will look similar to the mixture you have in your radiator. Its unlikely both will. If you have that mixture in the trans fluid, its the radaitor/trans cooler assembly, and needs to be replaced. If its in the engine oil, then it could still be the radiator assembly(but only if your car has an engine oil cooler built into that same assembly), or its a head gasket or cracked head(unlikely).


Now here is the how and why:

When the engine is running, the transmission line pressure running through the radiator is around 200psi. Any breaches that lead to engine coolant lines going through that radiator run at approx. 15 psi. That trans fluid will easily overpower that psi and bleed all into the coolant. However, when you turn the car off, the trans fluid pressure immedatly drops to 0. What happens to the coolant PSI? It goes up, over 15psi, because the coolant actually gets hotter once the engine is shut off for the next 20 min or so as the metals disapate the heat into the coolant. Now that breach between the trans and coolant lines sends that mixture of fluids the other way, into the transmission. If you have an engine oil cooler, and its oil thats breached into the coolant instead of trans fluid, then this same scenerio plays out. Engine oil PSI goes up to around 80psi, depending on how hard you drive, while coolant is pretty consistent 15psi. At idle the coolant psi may actually overpower the oil psi and send coolant into the oil systemm but you get the point.

If it is oil, and you do not have an oil cooler, then you need a coolant pressure tester in order to verify that it is not a head gasket or cracked head. If this problem turns out to just be a radiator assembly, replace it. Then perform a trans or oil, and coolant flush. It will be good as new once you are done. Let us know how it goes.

 

Thanks dark ember that helped a lot its starting to come along great now that I flushed it ... ima jus keep flushin it and it would come out better .. but I think I had a crack where tha trans hose is connected to tha rad. That's why it mixed

 

The cooler lines aren't at line pressure, but otherwise that's about it.

I'd consider that transmission already dead and in need of a rebuild if it had that much coolant in it.

 

Exactly, those are internal pressures, the oil cooler line is a low pressure line. I fear it's toast too with the water deteriorating the bonding agent of the friction material. Even if it does still shift it probably will go bad quickly.

 

Oh, I did not realize that about the trans line pressure. Anyone know what the pressure is in the cooling lines?

 

Most of the time maybe 50 PSI. Sometimes higher in a high-perf build.