Torqshift - Automatic Transaxle/Transmission

Hydraulic System

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

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

High Efficiency Sump Filter (HESF)

High Efficiency Sump Filter (HESF):

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

The remote filter and the previous design sump filter are both replaced by a high efficiency sump filter (HESF). The HESF is designed to trap smaller contaminants to help prevent solenoid sticking issues. Because the HESF is wider and taller, a new design bottom pan must be used with it as a set. The HESF requires replacement less often (96,000 km [60,000 mi] intervals) than the remote filter element and only the transmission fluid lost when installing a new design sump filter must be replaced. Refer to Transmission Fluid Drain and Refill - Without Torque Converter Drain Plug and With Fluid Pan Drain Plug.

Power Take-Off (PTO)

CAUTION: Failure to install the wire from the PCM pin 322 to pin 294 will result in low line pressure leading to power take-off (PTO) failure.

Some vehicles may be equipped with a power take-off (PTO). During stationary operation in PARK or NEUTRAL, the torque converter is locked up when the PTO is ON and the engine is operating at 1,200 rpm. The following chart shows the expected rpm and line pressure while driving with the PTO in use.