5 l40 - E common pneumatic valve fault and its solution 2)

L- 'E' is for gm's speed gearbox, were used in the BMW I, I, I/I, I, series, X, X and Z, Z, is also used on the part of the Cadillac models. This paper introduces some common faults caused by aerodynamic body wear phenomenon, such as TCC locking skid, transmission ratio fault codes, gearbox and torque converter is overheating, reverse delay or reverse, reverse locking pneumatic valve card, etc. , can you imagine the phenomenon of so many pneumatic valve body is likely to come from the same point of failure - — TCC locking pressure regulating pneumatic valve? 。 In L - E pneumatic valve body, the OEM original TCC regulating pneumatic valve is not, as shown in the figure, it does not take pneumatic valve sets, sliding pneumatic valve in the pneumatic valve hole directly. It is used in TCC solenoid pneumatic valve will be driven by the main hydraulic import torque converter locking and adjust the size of the locking hydraulic oil. The oil pressure signal is generated in the TCC solenoid pneumatic valve high frequency pulse signal, TCC surge driven by pneumatic valve in its continuous oscillation, and therefore prone to wear and tear. It is worth noting that the pneumatic valve at both ends of the form of wear and tear, the failure phenomenon is also different. It close to the end of the pneumatic valve with large diameter cylinder will be excessive wear, pneumatic valve electromagnetic signals can't push TCC regulating pneumatic valve movement to its normal position, lead to the locking hydraulic pressure regulating is insufficient, no lock, lock skid or locking problems such as weak. In this TCC to regulating the other end of the pneumatic valve ( The spring end of the pneumatic valve) Corresponding pneumatic valve, pneumatic valve will wear hole area, if the pneumatic valve hole here has an excessive wear and tear, will reduce the locking the adjustment of the oil pressure, higher locking hydraulic forming ( Because the locking hydraulic comes from the main oil pressure) And a locking impact. We'll analyze the influence of the pneumatic valve to reverse. OEM of the TCC regulating pneumatic valve often impact on adjacent electromagnetic pneumatic valve will stop, the passage of time is easy to TCC solenoid pneumatic valve on the mesh to hit, fall off a screen debris will be stranded on the reverse atresia pneumatic valve, causing the appearance of the no reverse. You might be in L - E in the reverse atresia pneumatic valve is unknown. Its role is to prevent the car suddenly when move in reverse and not let the oil into the reverse gear oil, in order to protect the transmission. Under normal circumstances, if the vehicle in MPH over the speed of moving forward, and suddenly you hang into the reverse, the reverse atresia pneumatic valve will work, gearbox will automatically enter the neutral state. If now the reverse locking pneumatic valve was stuck, even should make reverse, also have no a reverse. So TCC regulating pneumatic valve in actually produce reverse delay or reverse. To avoid this failure, this package (SONNAX SONNAX part number - K） Contains a protective spacer ( As shown) , thus effectively avoid the TCC regulating pneumatic valve will be crashed TCC solenoid pneumatic valve filter. Mentioned above not only the pneumatic valve will be wear and tear, and pneumatic valve hole will be wear and tear, in order to completely solve this problem, need to repair the pneumatic valve hole, and to eliminate the original cause slippery biased wear pneumatic valve and partial load rizhao-heze factors. SONNAX will, therefore, the TCC regulating pneumatic valve, outside of the pneumatic valve to join a highly wear-resisting aluminium alloy cover, this slide between the pneumatic valve and pneumatic valve hole relative motion becomes a slip between the pneumatic valve and pneumatic valve set of sport, and between the pneumatic valve and pneumatic valve set of lubrication and overcome the effect of partial load after the redesign can get very good control, greatly reduces the probability of wear and tear. In order to join the pneumatic valve set, and repair the original to be worn pneumatic valve hole, need to the pneumatic valve hole reaming operation. So how accurate positioning in the process of reaming reamer? This is a key issue. This design to use pneumatic valve body universal fixture, the future and this will be used more and more pneumatic valve repair universal fixture, it with reamer with locating sleeve can be easily and accurately locate the reamer. Once the reaming after accurately position the reamer, some needs a few minutes to complete. Finally, notice that the installation of the pneumatic valve repair package, be sure to use package with TCC of spring. Because the replacement of TCC pneumatic valve is smaller than the diameter of the OEM, so you need to work together and it matches the spring to return to to the correct TCC locking pressure specifications.