2001 Mountaineer Transmission Overheat

Last post on Dec 01, 2007 at 7:02 PM

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#1 of 1 2001 Mountaineer Transmission Overheat by rick93 Dec 01, 2007 (7:02 pm)
My 2001 Mountaineer's 4R70W transmission overheats. I replaced the filter and drained the fluid from the torque converter drain plug. I filled the transmission with 12 quarts of Mercon V. The capacity is 13.9 quarts. I'm sure there was at least 2 quarts that I couldn't drain. I ran compressed air through all the cooling lines and oil coolers. They are free of blockage. However, I ran the engine with both pressure and return lines fom the transmission and no fluid came out of the transmission. I don't think it has a bad pump since the torque converter refilled and the transmission shifts fine and does not slip. Is there a bypass valve, check valve, or a sensor that prevents the fluid from flowing? Any suggestion?

#1 of 1: 2001 Mountaineer Transmission Overheat by rick93; Dec 01, 2007 (7:02 pm)

My 2001 Mountaineer's 4R70W transmission overheats. I replaced the filter and drained the fluid from the torque converter drain plug. I filled the transmission with 12 quarts of Mercon V. The capacity is 13.9 quarts. I'm sure there was at least 2 quarts that I couldn't drain. I ran compressed air through all the cooling lines and oil coolers. They are free of blockage. However, I ran the engine with both pressure and return lines fom the transmission and no fluid came out of the transmission. I don't think it has a bad pump since the torque converter refilled and the transmission shifts fine and does not slip.

Is there a bypass valve, check valve, or a sensor that prevents the fluid from flowing? Any suggestion?