Automatic Transmission Fluid (ATF) Pump

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.

ITEM	DESCRIPTION
1	ATF filter
2	Intermediate plate
3	Drive pinion
4	Stator shaft
5	Drive chain
6	ATF pump

The ATF pump is located in an intermediate plate within the transmission main casing. The intermediate plate is attached to the inside of the transmission main casing with studs and nuts, behind the torque converter. The intermediate plate contains the splined stator shaft, to which the torque converter stator is connected. The torque converter shell extends into and drives a drive pinion with an integral sprocket, which operates a roller drive chain to drive the ATF pump. The drive pinion is therefore rotated at engine speed.

The pump is located at the bottom of the transmission main casing and is attached to the housing with screws. An ATF filter ensures that any particulate matter is collected by the filter before the ATF enters the ATF pump.

The ATF pump is a vane cell pump which can produce a pressure of between 3.5 and 44.0 bar (50 and 638 lbf/in² ) and a flow of 14.7 cm³ (0.9 in³ ). The pump can operate at speeds from 700 to 7800 Revolutions Per Minute (RPM) with a maximum speed of 8600 RPM.