That sucks. I am sorry to hear that the trans flush did not go as planned. I am really close to doing the same thing. Is there anything else that causes pink milkshake besides the transmission fluid mixing with the radiator fluid? Maybe to be on the safe side, replace the radiator. Keep us posted, and I hope your transmission is safe.
I have been thinking about the same thing since yesterday. The fluid was strange. It flowed dirty reddish brown at first and then the milkshake appeared. I am wondering now if I introduced to much air from the new lines, and the fact that I drained off quote a bit in the cooler install.
As well I would think that any number of things internally wrong with the trans could cause a similar reveal to the milkshake.
All I can do at this point is drive it a little and see. I did not want to drop the pan, but I will in a few weeks and inspect everything and then re-flush the system. Its a 100 bucks of fluid, but the diagnostics of viewing the fluid could answer a lot of questions. When I do it this time I will make sure the system is hot, the cooling lines full, and the beer cold, just in case.
There is no telling at this point if it is terminal or not. I will look for a re-buildable trans in the wrecking yards and start that as soon as I can, regardless of the outcome.
In the mean time I am going to get a radiator.
In regards to the radiator, I am thinking that most of what I read about milkshake failures is over 150,000 miles, so I would recommend changing it if you are over that and then at about 125,000 mile interval afterwards, maybe even 100,000 miles. Remember, milkshake failure is not the only damage that occur from a bad radiator.
My first and second gen trucks all went through radiators, but most of them never saw the pavement more than 20% of the time, and lived the hard farm life.
