Trans oil in the coolant. Is it possible? Need help please

[borispeed]

It has been a while driving with dirty coolant (brown color, and a mixed smelling of coolant with something else). I've flushed the radiator several times. I Switched orange to green color sometime ago, because of the same issue. When the used coolant it's in a bottle for about an hour, the brown stuff stays at the top, and the coolant looks clean at the bottom. (I'll put some pics later) The engine oil looks always clean, doesn't not increase or decrease. Transmission oil looks clean too, I dont' remeber the level (it's not low for sure). I've been researching here and there. A mechanic explained me pretty quick something like sometimes a band found in the lines that run from the radiator to around the transmission fluid breaks, causing leak to the lines. He suggested to install a sort of a small radiator to cool the transmission instead of using coolant. Have any of you have done this before? I need help please, cause I don't want to keep spending money in more coolant bottles.

[ssms5411]

Re: Trans oil in the coolant. Is it possible? Need help please

You can use a tranny cooler instead of using the radiator, pretty easy to do. I have mine using a 45,000 BTU tranny cooler and it works great.

[Rob Bell]

Re: Trans oil in the coolant. Is it possible? Need help please

You need a new radiator. There are transmission coolant lines that run in to the radiator. There are then tubes inside the radiator that have the transmission fluid circulating through them. Once the radiator is replaced, you should flush the coolant to get any transmission fluid out, and also change or flush the transmission fluid to get any engine coolant out of the transmission fluid.

You should use the radiator to cool the transmission because the transmission needs to be warm (same temp as coolant and engine) yet not too hot. An external transmission cooler, not running inline with the radiator's transmission cooler, will not allow the transmission to maintain the proper temperature.

Any external transmission cooler would be hooked up BEFORE the radiator's transmission coolant lines. This way the extra heat gets taken out of the transmission fluid, yet the radiator's transmission cooler lines will allow the transmission to run at the proper temperature. If you hook up the external cooler after the radiator, the fluid will be too cold, or will take too long to warm up.

[borispeed]

Re: Trans oil in the coolant. Is it possible? Need help please

You need a new radiator. There are transmission coolant lines that run in to the radiator. There are then tubes inside the radiator that have the transmission fluid circulating through them. Once the radiator is replaced, you should flush the coolant to get any transmission fluid out, and also change or flush the transmission fluid to get any engine coolant out of the transmission fluid.

You should use the radiator to cool the transmission because the transmission needs to be warm (same temp as coolant and engine) yet not too hot. An external transmission cooler, not running inline with the radiator's transmission cooler, will not allow the transmission to maintain the proper temperature.

Any external transmission cooler would be hooked up BEFORE the radiator's transmission coolant lines. This way the extra heat gets taken out of the transmission fluid, yet the radiator's transmission cooler lines will allow the transmission to run at the proper temperature. If you hook up the external cooler after the radiator, the fluid will be too cold, or will take too long to warm up.

I have a new radiator installed about one year ago, before that the coolant was already dirty. After installed the cooler was running clean but later it started getting dirt.