Where are the oil channels located in the oil pump housing?

On the oil pump housing side (SAT242) they carry forward clutch (rear) pressure, high-reverse clutch (front) pressure, and front lubrication pressure; on the oil pump plate side (SAT243) channels also include low and reverse brake pressure, oil pump suction side, and oil pump drain side.

What pressures pass through the converter housing attaching side?

Line pressure, oil pump suction side, oil pump discharge side, governor pressure, and torque converter in pressure (illustration SAT245).

Which oil channels are in the transmission case lower face side?

Torque converter in pressure, line pressure, governor pressure, forward clutch (rear) pressure, band servo apply pressure, band servo release pressure, oil pump suction side, low and reverse brake pressure, oil pump discharge side, high-reverse clutch (front) pressure, and torque converter lock-up pressure (SAT477).

What oil channels are in the front cover?

The front cover (SAT478) contains torque converter out pressure, torque converter in pressure, and rear lubrication pressure channels.

Where does the torque converter out pressure go in the converter housing?

The converter housing diagram (SAT246) labels torque converter out pressure as going to the oil cooler, along with torque converter in pressure and rear lubrication pressure (front oil cooler).

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Nissan Automatic Transmission Oil Channel Locations Diagram (AT-4)

Automatic transaxle oil channel diagrams for pump housing, converter housing, case and front cover

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AT-4 oil channel routing diagrams showing line, forward/high-reverse clutch, governor, lubrication and torque converter pressure passages across pump housing, converter housing, case and front cover.

AI caption October 2005 · Photo 183 of 412

This is page AT-4 from a Nissan automatic transmission service manual section titled 'General Service Notes – Oil Channel.' The page explains that oil channels connecting transmission components are located in the areas shown in six labeled line drawings. Illustrations cover: oil channels in the oil pump housing (oil pump housing side, SAT242, and oil pump plate side, SAT243), showing passages for forward clutch (rear) pressure, high-reverse clutch (front) pressure, front lubrication pressure, low and reverse brake pressure, and oil pump suction/drain sides; oil channels on the converter housing attaching side (SAT245), identifying line pressure, oil pump suction and discharge sides, governor pressure, and torque converter in pressure; oil channels in the converter housing (SAT246), locating torque converter out pressure (to oil cooler), torque converter in pressure, and rear lubrication pressure (front oil cooler); oil channels in the transmission case lower face side (SAT477), including band servo apply and release pressures and torque converter lock-up pressure; and oil channels in the front cover (SAT478). A reader can use this page to identify which hydraulic circuit each casting passage carries when diagnosing or overhauling the automatic transmission.

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Frequently asked questions

Where are the oil channels located in the oil pump housing?: On the oil pump housing side (SAT242) they carry forward clutch (rear) pressure, high-reverse clutch (front) pressure, and front lubrication pressure; on the oil pump plate side (SAT243) channels also include low and reverse brake pressure, oil pump suction side, and oil pump drain side.
What pressures pass through the converter housing attaching side?: Line pressure, oil pump suction side, oil pump discharge side, governor pressure, and torque converter in pressure (illustration SAT245).
Which oil channels are in the transmission case lower face side?: Torque converter in pressure, line pressure, governor pressure, forward clutch (rear) pressure, band servo apply pressure, band servo release pressure, oil pump suction side, low and reverse brake pressure, oil pump discharge side, high-reverse clutch (front) pressure, and torque converter lock-up pressure (SAT477).
What oil channels are in the front cover?: The front cover (SAT478) contains torque converter out pressure, torque converter in pressure, and rear lubrication pressure channels.
Where does the torque converter out pressure go in the converter housing?: The converter housing diagram (SAT246) labels torque converter out pressure as going to the oil cooler, along with torque converter in pressure and rear lubrication pressure (front oil cooler).