TRANSMISSION FILTER SYMPTOMS HOW TO

Sometimes, just disconnecting a battery so that the PCM has to start over learning how to hide these problems can reveal just how bad off some people’s transmissions really are. The PCM will do things like raise line pressure and change a clutch’s engagement timing to compensate for worn parts until it can no longer compensate for them. In this day of electronic transmissions, worn parts in the transmission can stay hidden until the day they completely give up all together. However, it didn’t become “like that” because you “worked on it.” It became “like that” because whatever it was that was wearing out got worse. On all accounts, that may be true it wasn’t like that … they could still drive it before. Naturally, when the vehicle becomes not drivable, they are screaming that it wasn’t like that before you worked on it.

Of course, like all things that begin to fail and cause a few symptoms here and there, the symptoms will become more exaggerated as the failing parts inside get worse. Normally, any other symptom is a sign that something is failing inside the transmission.

Just about the only transmission operating concern that stands a chance of being corrected with fluid replacement is a brief light shudder during TCC and/or certain speed engagements. It is all too often that a customer will notice a shifting or engagement problem, then take their car in to have the transmission serviced thinking that will fix it. It is important for the fluid to be in good condition because it serves to lubricate the components. The gears also heat the fluid and grind at the fluid’s molecules, as well as contaminate it with metal.Įventually, the fluid is so ground up, cooked and contaminated that it should be replaced with fresh fluid. It is during that slipping period that heat is generated that cooks the fluid, friction material wears off and enters the fluid, and the fluid’s molecules are being sheared. As the friction material of a clutch or band begins to apply, there is a brief slipping period.

Transmission filter symptoms