Sludge in coolant reservoir?

So what happens is the transmission cooler inside the radiator goes bad and pushed transmission fluid inside of the engines cooling system, please go over this guide to see what I am talking about:

https://www.2carpros.com/articles/transmission-fluid-in-radiator-coolant-reservoir

You will need to replace the radiator and flush the cooling system.

And the cooler?

Or did you mean replace cooler and flush cooling system?

Or replace radiator and cooler?

The cooler is inside the radiator, so just replace the radiator.

It isn’t inside on this one though. It has a radiator and a separate transmission cooler.

Here’s a pic. At least I’m assuming that’s what that is.

Hmm, does it have transmission cooling lines going into the radiator?

lol never mind it’s A/C condenser.

She said she just had the radiator replaced not too long ago so I’m thinking that maybe they didn’t change the reservoir and that’s why the radiator wasn’t that dirty but the reservoir is full of gunk.

Can I submerge the radiator and put my compressor on the transmission cooler line and check for bubbles to see if it’s leaking internally? Or would that not work or could that possibly mess up the trans cooler part?

That could be that is was left over from the pervious repair, you cannot submerge the radiator and look for leak, sorry.

How do I flush the system?

Dump and fill several times is your best bet, here is a guide to help you:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Once the system is empty, pour more hot water through it to help get the sludge out. Also, before you begin try to use a turkey baster to suck as much as you can off of the top. Let us know how it goes.

Do I need to flush the transmission also?

That would be a good idea as well, yes. good call

A trans flush won’t damage it since it has a lot mileage on it?

And the trans fluid isn’t pink, so does that mean there’s no coolant in it? Looks dirty but not pink.

It looks like it needs to be changed, it is tough to tell if there is coolant in there.

I tried to ask a question about an oil pump and It was there for like a day but now it’s gone. Should I redo it? Or is it just my browser or something

Best would be to log in and ask it again, there have been a few site issues lately.
https://www.2carpros.com/questions/new Thank you.