Transmission Page F-1
Page F-1
Section F
Transmission
ATTENTION
HSV vehicles are equipped with a Supplemental Restraint System (SRS). An SRS consists of seat belt pre-
tensioners (fitted to all front seats), a driver’s-side air bag, a passenger’s-side air bag, and left and right hand
side air bags. Refer to CAUTIONS, Section 12M, of the Holden WK Service Information before performing any
service operation on or around SRS components, the steering mechanism or wiring. Failure to follow the
CAUTIONS could result in personal injury or unnecessary SRS system repairs.
1 Purpose................................................................................................................................................... 2
1.1 General Information...............................................................................................................................................2
2 Automatic Transmission....................................................................................................................... 3
2.1 General Description...............................................................................................................................................3
HSV WK Grange 285 Sedan...................................................................................................................................3
Powertrain Control Module (PCM)........................................................................................................................3
Transmission Page F-2
Page F-2
1 Purpose
The purpose of this bulletin is to provide information on the transmission assemblies fitted to the HSV WK models. This
information is designed to supplement the information contained in the Holden WK series Service Information, and
details are given where differences occur between the HSV models and standard Holden models. A series of instruction
drawings describe the design changes and indicate specific part numbers, fitting instructions and relevant notes for
vehicle servicing.
NOTE
If specific technical data on a HSV model is not
contained in this supplement, obtain data for that
model from the relevant Holden WK Service
Information Supplement. References are made
throughout this section to Holden Service
Information, to assist in providing information for
specific service operations.
When hoisting (or jacking) HSV models,
ensure that the lifting head of the hoist lifts
on the chassis before the arm of the hoist
contacts the side-skirt
1.1 General Information
The WK Grange is equipped with a four-speed automatic transmission only. HSV models fitted with Holden
transmissions are to be serviced in accordance with the relevant Holden Service Information.
Transmission Page F-3
Page F-3
2 Automatic Transmission
2.1 General Description
The automatic transmission fitted to the HSV WK model is a variant of the Hydra-matic 4L65E transmission. Depending
on application, this transmission may include calibration or hardware changes over the standard transmission.
These transmissions are all developments of the standard Holden Hydra-matic 4L65-E transmission. As in all HSV
developments, reliability and efficiency have been improved as a result of engineering research, development and
extensive testing. In most cases, development of the standard transmissions has been necessitated by - and carried out
in parallel with - the development of HSV’s enhanced range of engines. The result is that all HSV WK models have an
engine-transmission combination designed to satisfy (and to exceed) the operating specification of the vehicle.
HSV WK Grange 285 Sedan
The Automatic Transmission available for the Grange 285 Model, is the model HZD. The HZD transmission has a higher
torque capability than the standard “HAD” transmission found in the Holden VY2 series.
Powertrain Control Module ( PCM)
HSV transmissions fitted to 285 kW vehicles incorporates a specific PCM. This HSV PCM is calibrated to recognise the
higher torque of the engine, and to provide a specific shift pattern for optimum control of the vehicle. Section E of this
Supplement provides the identification and service numbers of the PCM required for these transmissions.
For WK HSV have taken the opportunity to include two very different transmission modes using the Power/Economy
switch. The economy mode shift pattern has been optimised for smooth driving while the Power mode gives firmer shifts
and takes advantage of the LS1 engines characteristics.