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故障现象:有一款福特水星子弹头车,装备了电脑控制自动变速器,型号为4F20-E,此车有4个前进档和一个倒档。据车主叙述,此车几天前开始发闷,没有高速,以往汽车车速达到100km/h时的发动机转速在2600r/min就可以了,而现在却必须要达到3200r/min以上才行。 故障检测:试车,从静止开始起步,保持节气门开度30％不变,直到100km/h的车速,发现只有一个明显的换档过程,而这个换档点接近于车速达到45km/h时才发生,因此认为此车行驶时只有两个正常档位,1档和3档,没有2档和超速档。拔下油尺发现,变速器油过多。车主说上星期在其他修理厂更换过变速器油。拆下变速器,分解各部
Symptom: There is a Ford Mercury bullet car, equipped with a computer-controlled automatic transmission, model 4F20-E, the car has four forward gears and one reverse gear. According to the owner described this car began to send stuffy boring a few days ago, there is no high-speed, in the past when the car speed reached 100km / h when the engine speed at 2600r / min on it, but now it must reach 3200r / min Caixing. Fault detection: test run, start from rest, keep the throttle opening 30% unchanged, until the speed of 100km / h, found that there is only one obvious shift process, and the shift point is close to the speed of 45km / h Occurred, so that this car when driving only two normal gear, 1 gear and 3 gear, no 2 gear and overdrive. Unplug the dipstick and found that there is too much transmission oil. The owner said that the transmission oil was replaced at other repair shops last week. Remove the transmission and disassemble the units