This internal bypass valve in the housing is set at 25 psi to allow some fluid to bypass the filter should the filter become restricted. The unit has a bypass valve in the housing as an added safety feature. After installation of the external kit the filter in the pan now acts simply as a pickup for the pump and virtually never needs changed. Keeping the fluid clean, keeps your valve body clean which keeps your transmission shift quality at its highest. With this kit you can catch dirty fluid BEFORE it makes it back to the pan. ![]() This dirty fluid would be recirculated back to the pan. This fluid will have clutch dust and other impurities which are all normal in any automatic transmission. After running through the transmission, it leaves as "dirty" fluid. Normally, dirty fluid is in the pan, and we assume the OEM filter catches the really big particles before it enters the valves and pump. This location allows for a filter with increased efficiency - or smaller micron rating. The filter is on the "push" side of the pump. With the optional pressure gauge to monitor when you should change your filter, you can avoid unnecessary filter changes. The OEM filter location requires that you pull the pan to change or check the filter. With this kit you can simply spin on a new filter element. ![]() This is not a new idea in transmission maintenance and protection. The Allison in the Chevy and many medium Duty and heavy Duty trucks come equipped from the factory with an external transmission filter. The only way to get fine filtration for a transmission is with an external transmission filter kit on the push side of the pump. The 4R100/E4OD and many other transmissions were never equipped with this type of external filter. Fine filtration in the pan is not an option for the transmission manufacturers due to the fact that transmission pumps should not be restricted. There is no cutting or modifying needed of the OEM lines or connections when installing the unit.Īutomatic transmissions have internal filters designed to capture only large particles. These filters are designed as a pickup to keep large particles from flowing through the transmission. These filters are on the suction side of the pump. This allows for easier installation and quick removal should the need arise. Product Name: DieselSite External Transmission Filter KitĪpplication:2003-2007 Dodge 47RE/48RE TransmissionsĭieselSite kits are made with stainless braided high pressure hose and fittings that match the OEM connections.
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