Transmission starts overheat after coolant change due coolant temperature unnormal


Asked by Aug 09, 2014 at 09:38 AM about the 1995 Ford Crown Victoria 4 Dr STD Sedan

Question type: Maintenance & Repair

Firstly, I've change filter and gasket, add proper amount of Mercon V in transmission. 

Everything, was perfect. Car rides smooth and fast. Then I decide to change coolant. I 

drain and flush all system. Cleaned it with distilled water. Add new coolant (I'm in 

Europe so found only european ethylene-glycol Motorcraft coolant) After this car 

getting worse. On speed over 65 mph when I let go pedal transmission heavily pulls on

upshifting. Speedometer arrow stucks on 20 mph after long riding when car stops.
Temperature arrow on dashboard always upper than "normal" when riding (outboard
temperature 95-100 F), but when I turn off headligths arrow immediately goes to
"normal", but not for long time. After all of this I've change coolant (I've tried different
type of coolants) (with cleaning) about two times. This problem still appears. Please

2 Answers


Do you suspect your trans fluid is mixing with the coolant? Does the coolant look red? Transmission fluid look foamy?


No, coolant is green, tranny fluid is good, smells as need to, no bubbles, nothing suspicious. Thats the first unknown problem with my Crown Vic.

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