Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

ZF 6HP26 Automatic Transmission Component Location
PRND LCD display1
M/S LCD display2
Selector lever assembly3
Instrument cluster4
Automatic transmission5
Transmission fluid cooler6
Automatic TransmissionLesson 2 – Powertrain
245Technical Training (G421157) 

GENERAL
The ZF 6HP26 transmission is an electronically
controlled, six speed unit. The transmission is
manufactured by ZF Transmissions GmbH in
Saarbrücken, Germany. This transmission represents
the latest in automatic transmission technology and
incorporates new features to enhance the transmission
functionality:
•The hydraulic and electronic control elements of the
transmission are now incorporated in a single unit
located inside the transmission and is known as
Mechatronic
•Another new strategy is...

ZF 6HP26 Automatic Transmission – Exploded View
NOTE: The transmission shown is exploded to the extent of the serviceable items
Breather tube1Plug2
Automatic TransmissionLesson 2 – Powertrain
247Technical Training (G421157) 

Seal sleeves3
Seal - Selector shaft (2 off)4
Gasket5
Drain plug6
Fluid pan7
Torx screws8
Mechatronic valve block9
Element seal10
Electrical connector – guide sleeve11
O-ring12
O-ring13
Pump housing14
Input shaft seal15
Torque converter16
The gearbox comprises the main casing which houses
all of the transmission components. The main case also
incorporates an integral bell housing.
A fluid pan is bolted to the lower face of the main case
and is secured with bolts. The fluid pan is sealed to the
main case...

ZF 6HP26 Automatic Transmission – Sectional View
Torque converter lock-up clutch1
Torque converter2
Fluid pump3
Single planetary gearset4
Automatic TransmissionLesson 2 – Powertrain
249Technical Training (G421157) 

Clutch A5
Clutch B6
Clutch E7
Brake C8
Brake D9
Double planetary gearset10
Park lock gear11
Output shaft12
Park lock pawl13
Drain plug14
Magnet15
Pressure regulator16
Mechatronic valve block17
Fluid filter18
Fluid pan19
Input shaft20
Transmission casing21
TORQUE CONVERTER
Torque Converter Components - 4.0L V6 and 4.4L V8
Models
Impeller1
Turbine2
Stator3
Freewheel4
Torque converter hub5
Stator shaft6
Turbine shaft7
Drive plate8
Journal - Drive plate location9
Torque converter cover10
Lock-up clutch...

Torque Converter Components - TdV6 Models
Turbine1
Impeller2
Stator3
Freewheel4
Torque converter hub5
Stator shaft6
Turbine shaft7
Journal - Drive plate location8
Torque converter cover9
Lock-up clutch piston10
Drive plate11
Lock-up clutch plate12
Torsional vibration damper13
The torque converter is the coupling element between
the engine and the gearbox and is located in the
transmission housing, on the engine side of the
transmission. The driven power from the engine
crankshaft is transmitted...

Impeller
Fluid Flow
NOTE: Typical torque converter shown
Turbine1
Stator2
Impeller3
When the engine is running the rotating impeller acts
as a centrifugal pump, picking up fluid at its centre and
discharging it at high velocity through the blades on its
outer rim. The design and shape of the blades and the
curve of the impeller body cause the fluid to rotate in a
clockwise direction as it leaves the impeller. This
rotation improves the efficiency of the fluid as it contacts
the outer row of blades on the...

would have the effect of applying a brake to the
impeller, eliminating the torque multiplication effect.
To prevent this, the stator is located between the
impeller and the turbine.
Stator
The stator is located on the splined transmission input
shaft via a freewheel clutch. The stator comprises a
number of blades which are aligned in an opposite
direction to those of the impeller and turbine. The main
function of the stator is to redirect the returning fluid
from the turbine, changing its direction to...

and deflected by the stator blades from path B to path
C. This ensures that the fluid is directed back to the
pump in the optimum direction. In this condition the
sprag clutch is engaged and the force of the fluid on the
stator blades assists the engine in rotating the impeller
As the rotational speed of the engine and therefore the
turbine increases, the direction of the fluid leaving the
turbine changes to path D. The fluid is now directed
from the turbine to the opposite side of the stator blades,...