Help! Internal radiator failure.

I returned home after a lengthy trip moving my son from Michigan to NYC, hauling a U-Haul trailer. Upon returning the trailer, I noticed some strange transmission issues, but it got me home, which was only a few miles away.

looking under the hood, it appears my coolant reservoir is overflowing, leading me to believe an internal radiator leak allowed transmission fluid and coolant to co-mingle. I figure I’m in for a radiator change, and a transmission and engine flush, at a minimum.

It’ll be about a month before I can get around to doing the work. I have a hoist, and feel confident I can do the work. My question is: is it OK to leave the vehicle for a month as is until I can get around to it, or should I drain it all right now before further issues arise? I don’t plan to drive it anywhere before doing the work. But I don’t want to tie up my hoist with this vehicle for a month in case I need it for my other cars.
Thoughts? Suggestions?

Thanks all!

Colin

 

What color is the fluid in the rad and overflow?

 

It’s all red. The tranny fluid and coolant were both red/pink to begin with.

 

A month. I would drain it.

 

Here's an update, and a question for the forum:

I've flushed the transmission numerous times by pumping in 4 quarts of T-IV, then starting the engine and pumping out the fluid. It is now looking like just like fresh tranny fluid. Once the vehicle is driveable again (I have to finish replacing all the steering components and flushing the engine of the pink milkshake), I'll drive it around for a while and then do another fluid change. So far, none of the old tranny fluid has shown any pink milkshake, just the coolant has.

My question: From what I gather, to properly check the transmission level, the procedure is to use TechStream to monitor the temperature of the transmission, and when the proper temperature is reached, to open the drain plug and allow the excess fluid to drain out until a pencil-lead stream is achieved.

Does anyone know where to find the procedure? I have a "cracked" version of Toyota TechStream, and have used it with success on my 2014 Camry SE. However, I can't seem to find the procedure -including the proper temp range- for the 2005 Sequoia Limited that I own.