Hydraulic System

Hydraulic System

Fluid Pump
This transmission has a gear type pump that supplies fluid under pressure to the hydraulic system.

The torque converter impeller hub rotates the drive gear of the pump.

Filter
Fluid is drawn from the transmission pan by the pump through the filter. The filter and its accompanying seal are part of the fluid path from the sump (pan) to the pump

Remote Fluid Filter

Remote Fluid Filter (Part 1):

This transmission is equipped with a remote filter transmission fluid filter. Most of the transmission fluid which leaves the front fluid cooler tube connector passes through the remote filter and is directed into the cooling circuit. The remote filter manifold, by-passes the filter element and takes 10% of the incoming hot fluid and directs it through a small orifice and into a serviceable filter element. The filtered transmission fluid is then directed back into the rear lubrication circuit through the larger opening in the remote filter manifold. Refer to Transmission Fluid Cooler - Backflushing and Cleaning.

Power Take-Off (PTO)

NOTE: Failure to install the wire from the powertrain control module (PCM) pin 322 to pin 294 will result in low line pressure leading to power take-off (PTO) and transmission failure.

Some of these vehicle may be equipped with a PTO. During stationary operation in PARK or NEUTRAL, the torque converter is locked up when the PTO is ON and the engine operates at 1200 rpm. This schedule shows expected rpm and line pressure while driving with the PTO in use.