- Transmission/Drivetrain Sponsor
by sportredtruck [OP] » Jun 23 2011, 7:55pm
by DRK4X4 » Jun 23 2011, 8:19pm
by AzDragonLord » Jun 23 2011, 11:38pm
by LeveledGMC » Jun 24 2011, 12:28am
by Z15 » Jun 25 2011, 1:35pm
The filter is not changed but is flushed backwards.
Some people believe that all transmission filters are backflushed clean every time the vehicle is turned off. This is a major misconception. Three-quarters of all transmission filters today are not a simple screen, they are made of felt. A felt filter CANNOT be backflushed. Felt holds dirt particles within tiny pores in the felt. It will not wash out or flush out. If a felt filter becomes clogged it must be replaced. Clogged filters restrict fluid flow, which lowers pressure to clutches and bands. This can cause slippage and eventual burnout of the transmission.
There have been an increasing number of instances surfacing recently regarding transmission failures shortly after an evacuation service, without filter removal. At the time of a fluid evacuation service, there is no way to know the condition of the filter and how clogged it may be. The filters job is to collect and hold contaminants, (dirt, metal filings, friction particles, etc.), and prevent these particles from causing malfunction in such components as electronic force motors and solenoids. Today's transmissions are far more susceptible to malfunctions caused by fine dirt contamination. Without servicing the filter, there is no way to know if the filter is clean of debris or nearing capacity. If the filter is nearing capacity, transmission failure may not be far off. This is also a sign that there may be other internal problems in the transmission. Recognizing these warning signs could eliminate major service later.
Even if the fluid evacuation method is desired to remove the used transmission fluid, the pan should be removed also, and an inspection should be made of the pan contents, fluid, and filter to determine the condition of the transmission. Aluminum filings in the pan or iron filings on the pan magnet are signs of internal wear and may give light to potential problems in the transmission. Transmission service is performed for preventative maintenance. Evaluating the overall condition of the transmission by removing the pan should be part of this preventative maintenance also.
by gOt BoOsT » Jun 28 2011, 2:42am
by uneasyrider » Jun 28 2011, 2:47am
by jocko463 » Jul 02 2011, 3:40am
uneasyrider wrote:Well you guys convinced me to stay with the old drop the pan and change the filter even if I leave a little fluid in the tranny.
by HammerDown » Jul 16 2011, 12:06am
by 6Sixathome » Jul 17 2011, 9:03pm
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