I have a mazda mpv 2003 and I got stuck suddenly pressing gas and car wouldn't move just made neutral gear noise. After 20 minutes I turned it back on and it drove fine. Transmission is milkshake color likely the radiator broke. I took out the radiator and drained transmission it was very pink. I added like 4 or 5 quarts of new fluid and drained it a little more, reddish pink but still pink. Any hope of fixing this or is car ruined? Do I just keep adding fluid until it drains the correct color or do I also need to pump it out from the top? I drained it via the transmission hose that connects to radiator. Everything works fine and very low mileage, engine is great and starts up strong, would be a shame to scrap this car if it can still be saved. I know usually transmission is done when this happens but what other ways do I need to drain this and also how many quartz do I need to add to flush this out and what would be the best process(engine running, off, etc.) Thanks som much, I am willing to invest a bit of time and money for the slight chance that it will work.
Once you get water into the transmission, it ruins the gaskets and the clutches. As I'm sure you already suspect, it will go downhill from here.
You can try getting a transmission fluid flush done at a shop, and maybe it will last a little longer, but the only real "cure" is to rebuild the transmission.
I would look for another vehicle. Those Mazda vans...when they go, they usually GO which is what sounds like happened to yours.
It isn't worth the cost it would take to rebuild the transmission and you would definitely want a pro to do it as it is a lot harder than it looks. You also would want a mechanic to flush the trans if you plan to try that route, though honestly I'd give it a 5% or less chance of working and suggest you save your money.
@mountainmanjoe is absolutely correct in his assessment. Once you get water in the transmission, short of a rebuild, there is really nothing you can do.
What is the best process to flush it if doing it at home.
in your case I would pay the toll and have it professionally done.
AFAIK, flushing a transmission is typically professionally done since it requires a machine to push fluid through the system without recycling it. You can do a pseudo-flush very slowly on your own, but you won't be able to get all of the fluid out on your own. I wouldn't really recommend it, but here's the process.
Let's assume that you can drain your transmission, and that removes 1/3 of your fluid because some is still trapped in the transmission and torque converter (check the amount you drain and the manual to see the exact fraction). If you drain and refill once, you will replace 1/3 of the fluid. If you do it twice, you will have replaced 56% of the fluid. If you do it three times, you'll have replaced 70% of the fluid. You'll need to run the transmission a bit between each drain and refill to mix everything up.
The formula goes like this: FractionOfOriginalFluidLeft = (1 - FractionOfFluidRemovedInEachDrain) ^ NumberOfTimesDrained