05 annual production Honda Accord 3.0 sedan (CM6), equipped with BAYA 5-speed automatic transmission. The car in the process of running the transmission has been slipping phenomenon, but the failure time is uncertain, so there has been no thorough inspection. During the last high-speed running, a large number of transmission oil was ejected from the upper vent of the transmission case, causing the vehicle to continue to travel and being towed into the repair shop.
    Troubleshooting: According to the maintenance staff for many years to repair the experience of automatic transmission, because the lack of transmission oil caused by the fault is relatively easy to repair, generally only need to check out the cause of the transmission oil temperature is too high and replace the ablation of friction plates and other components, And then the internal cleaning of the transmission can solve the problem. First check the transmission oil, from the transmission oil contained in the impurities can be seen inside the transmission has been severely ablated, so the maintenance staff decided to disassemble the transmission. After disassembling the transmission, check the status of the components and find that the drive gears and driven gears of the transmission pumps are severely burned and that there are multiple degrees of ablation of the clutch friction plates. Replace the transmission oil pump, the main valve body and burn the friction plate, and clean the transmission inside.
    In this need to remind the maintenance staff to note that the transmission oil from the main valve body, through the transmission housing on the oil path to reach the clutch, the middle of the oil on the road there are many seals, these seals are allowed to have a slight leak, But can not exceed the limit. Many maintenance personnel in the inspection of the clutch is generally only the use of compressed air on the clutch piston for a simple compression test, by observing the clutch piston action to determine the clutch is good or bad, in fact, this is not appropriate, due to excessive oil pressure caused by clutch filling Oil time is too long, can cause the transmission shift process slightly slippery or running in a serious slip and other failures. Maintenance personnel will be 800kPa of compressed air applied to a separate transmission oil storage tank, from the tank to the transmission oil can be adjusted to 600kPa pressure, the use of this pressure drive the clutch, and then use the dial gauge to measure the clutch piston The trip. In accordance with the above method, the use of the United States Senaikesi transmission oil flow meter to test the amount of leakage of the clutch and the use of thousands of points to measure the clutch piston stroke, the data are in line with the requirements.
    Maintenance personnel believe that although many models of the transmission valve body a higher probability of problems, but the Honda cars in the BAYA type transmission solenoid valve a lot of mechanical slide valve is very small, and has been carefully checked and replaced in front of the main Valve body, so the transmission should be no problem after the installation. Assembling the transmission after loading, filling the right amount of transmission oil after the road test, but soon there is a problem, although there is no obvious sense of slippery transmission, but the block shift process is not soft, and still some poor acceleration. Engine speed at 2000r / min, 5 block speed is 100km / h, and the normal speed difference of about 20km / h, what is the reason?