Quote:
Originally Posted by MT1972cheyenne
...Transmission fluid would go into radiator, but no coolant would go into transmission.
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Until you turn it off and then the pressure in the radiator is higher. You need to address this immediately! If you get water in the transmission it is already too late. The water attacks the glue on the clutches and they come apart. Found this out first hand on a '71 Eldorado. The TH425 FWD transmission is basically a TH400 with a chain drive from the torque converter to the pump. This problem requires a new transmission cooler. A radiator shop can take the tank off and replace it, but if the radiator has any age you may be better off just replacing it, or having it recored at the same time.