An annual output of 2000 Honda Accord 2.3L sedan, equipped with automatic transmission model MPXA, the owner feels automatic transmission oil temperature is high (when the dipstick from the oil feet, the heat machine when the white smoke from the oil feet ), While reflecting the automatic transmission internal abnormal sound.
    Will frame up, hear the automatic transmission internal sound abnormal sound, similar to the bearing burned sound, abnormal with the engine speed increases and larger. Because of this fault phenomenon is more obvious, I think that after the automatic transmission will be able to quickly find the cause of failure, so the automatic transmission was disassembled. However, after the disintegration of the thrust bearing, gear mechanism and one-way clutch, etc. are normal, repeated the internal parts of the transmission to check many times, did not find the cause of the malfunction.
    What is the noise caused by what? High oil temperature should be the focus of diagnosis! Transmission has been checked inside no problem, is the fault out of the external? What is it on the outside? Will automatically re-installed after the test and found that when the automatic transmission no abnormal sound, hot car abnormal sound appears, the test found that abnormal sound when the automatic transmission oil temperature above 120 ℃, obviously the temperature is too high. ATF oil surface normal, oil is not missing.
    Why is the temperature rise too fast too high? After thinking about it, only the automatic transmission radiator heat dissipation, try to open the tubing that pipe, the oil flow is too small, can be determined to be automatic transmission heat sink blockage. ℃ or so, abnormal sound also disappeared. This vehicle is blocked by the automatic transmission radiator, the flow rate and the flow rate of the inlet and outlet are not the same, which causes the oil temperature in the automatic transmission to be too high, and the lubricating condition of the internal parts of the transmission is deteriorated. After the maintenance of the author that: If the normal demolition of the transmission within the absence of trouble, it is necessary to focus on other parts of the focus, do not be tough.