2010 JAGUAR XFR Rear Drive

each damper to the appropriate level to maintain a flat and level body.
Roll Rate Control – Uses CAN inputs. Predicts vehicle roll rate due to driver steering inputs 100 times a second and increases damping to reduce roll rate.
Pitch Rate Control – Uses CAN inputs. Predicts vehicle pitch rate due to driver throttle and braking inputs 100 times a second and increases damping to reduce pitch rate.
Bump Rebound Control – Uses suspension height sensor and CAN inputs. Monitors the position of the wheel 500 times a second and increases the damping rate as the damper approaches the end of its travel.
Wheel Hop Control – Uses suspension height sensor and CAN inputs. Monitors the position of the wheel 500 times a second and detects when the wheel is at its natural frequency and increases the dampingto reduce vertical wheel
motion.

Under normal road conditions when the vehicle is stationary with the engine running, the dampers are set to the firm condition
to reduce power consumption.

The adaptive damping module receives its power supply via a relay and fuse in the CJB. The relay remains energized for a period of time after the ignition is off. This allows the adaptive damping module to record and store any DTC (diagnostic
trouble code) relating to adaptive dynamics system faults.



DAMPERS Component Description



Item Description A Front spring and damper assembly B Rear spring and damper assembly The 'Adaptive Dynamics' dampers are monotube, nitrogen gas and oil filled units, manufactured by Bilstein. The dampers are
continuously variable, which allows the damping force to be electrically adjusted when the vehicle is being driven. The variable
dampers provide the optimum compromise between vehicle control and ride comfort.

The dampers have an electrical connector on the end of the piston rod, in the center of the top mount (the dampers look
identical to those on the Computer Active Technology Suspension (CATS) system of 4.2L supercharged vehicles, but have a
different part number).

In each damper, the continuous damping adjustment is achieved by a solenoid operated variable orifice, which opens up an
alternative path for oil flow within the damper. When de-energized the bypass is closed and all the oil flows through the main
(firm) piston. When energized, the solenoid moves an armature and control blade, which work against a spring. The control
blade incorporates an orifice which slides inside a sintered housing to open up the bypass as required. In compression, oil
flows from the lower portion of the damper through a hollow piston rod, a separate soft (comfort) valve, the slider housing and
orifice and into the upper portion of the damper, thereby bypassing the main (firm) valve. In rebound the oil flows in the www.JagDocs.com

Driveline System - General Information - Driveline System
Diagnosis and Testing

Principle of Operation Published: 11-May-2011

For a detailed description of driveline operation, refer to the relevant Description and Operation section in the workshop
manual. REFER to:

Driveshaft (205-01 Driveshaft, Description and Operation), Driveshaft (205-01 Driveshaft, Description and Operation), Driveshaft (205-01 Driveshaft, Description and Operation), Rear Drive Axle and Differential (205-02, Description and Operation),
Rear Drive Axle and Differential (205-02, Description and Operation),
Rear Drive Axle and Differential (205-02, Description and Operation),
Rear Drive Halfshafts (205-05 Rear Drive Halfshafts, Description and Operation), Rear Drive Halfshafts (205-05 Rear Drive Halfshafts, Description and Operation), Rear Drive Halfshafts (205-05 Rear Drive Halfshafts, Description and Operation).
Inspection and Verification


CAUTION: Only serviceable items can be renewed or adjusted. Failure to follow this instruction may result in the warranty
of the component being rejected.

Certain driveline trouble symptoms are also common to the engine, transmission, wheel bearings, tires, and other parts of the
vehicle. For this reason, make sure that the cause of the trouble is in the driveline before adjusting, repairing, or installing any
new components. For additional information, refer to Workshop Manual section 100-04 Noise, Vibration and Harshness.
1. Verify the customer concern by carrying out a road test of the vehicle.

2. Visually inspect for obvious signs of mechanical damage and system integrity.

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step.
4. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Identify the Condition

Gear Howl and Whine

Howling or whining of the ring gear and pinion is due to an incorrect gear pattern, gear damage or incorrect bearing preload.

Bearing Whine

Bearing whine is a high-pitched sound similar to a whistle. It is usually caused by worn/damaged pinion bearings, which are
operating at driveshaft speed. Bearing noise occurs at all driving speeds. This distinguishes it from gear whine which is speed
dependent.



As noted, pinion bearings make a high-pitched, whistling noise, usually at all speeds. If however there is only one pinion
bearing that is worn/damaged, the noise may vary in different driving phases.
A wheel bearing noise can be mistaken for a pinion bearing noise.

Chuckle

Chuckle that occurs on the coast driving phase is usually caused by excessive clearance between the differential gear hub and
the differential case bore. www.JagDocs.com

Clunk

Clunk is a metallic noise heard when the automatic transmission is engaged in REVERSE or DRIVE. The noise may also occur
when the throttle is applied or released. Clunk is caused by transmission calibration, backlash in the driveline or loose
suspension components and is felt or heard in the vicinity of the rear drive axle.

Bearing Rumble

Bearing rumble sounds like marbles being tumbled. This condition is usually caused by a worn/damaged wheel bearing. The
lower pitch is because the wheel bearing turns at only about one-third of the driveshaft speed. Wheel bearing noise also may
be high-pitched, similar to gear noise, but will be evident in all four driving modes.

Symptom Chart

Symptom Possible Cause Action Noise is at constant tone over
a narrow vehicle speed range.
Usually heard on light drive
and coast conditions
Rear drive axle
For additional information, GO to Pinpoint
Test A. Noise is the same on drive or
coast
Road
Worn or damaged driveshaft joint
Driveshaft center bearing
Wheel bearing
No action required for road noise
Install new components as required Noise is produced with the
vehicle standing and driving
Engine
Transmission
For additional information, REFER to:
Engine - 3.0L/4.2L (303-00 Engine System - General Information, Diagnosis and Testing),
Engine - 2.7L Diesel (303-00 Engine System - General Information, Diagnosis and Testing),
Diagnostic Strategy (307-01A Automatic Transmission/Transaxle - V6 3.0L Petrol,
Diagnosis and Testing). Loud clunk in the driveline
when shifting from reverse to
forward
Transmission calibration
Transmission Mount
Transmission
Suspension components
Backlash in the driveline
Engine idle speed set too high
Engine mount
Using the Manufacturer approved diagnostic
system, re-configure the Transmission
Control Module (TCM) with the latest
available calibration
Inspect and install new transmission mounts
as required
For additional transmission information,
REFER to: Diagnostic Strategy (307-01A Automatic Transmission/Transaxle - V6 3.0L
Petrol, Diagnosis and Testing).
Inspect and install new suspension
components as required
Inspect and install new driveline components
as required
Check and adjust the idle speed as required
Inspect and install new engine mounts as
required Clicking, popping, or grinding
noises
Inadequate or contaminated
lubrication in the rear drive
halfshaft constant velocity (CV)
joint
Another component contacting the
Inspect, clean and lubricate with new grease
as required
Inspect and repair as required
Inspect and install new components as
required

Symptom Possible Cause Action rear drive halfshaft
Wheel bearings, brakes or
suspension components Vibration at highway speeds
Out-of-balance wheel(s) or tire(s)
Driveline out of
balance/misalignment
Driveshaft center bearing touching
body mounting point
Balance and install new wheel(s) and tire(s)
as required
REFER to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).
For additional information,
REFER to: Driveline Angle Inspection (205-00 Driveline System - General Information,
General Procedures).
Refer to the Manufacturer approved
diagnostic system for driveshaft balancing
application
Check for correct spacer washer thickness.
Inspect and install new washers as required Shudder, Vibration During
Acceleration
Powertrain/driveline misalignment
High constant velocity (CV) joint
operating angles caused by
incorrect ride height
Check for misalignment. Install new
components as required. For driveshaft
alignment,
REFER to: Driveline Angle Inspection (205-00 Driveline System - General Information,
General Procedures).
Check the ride height and verify the correct
spring rate. Install new components as
required Lubricant Leak
Rear drive axle breather
Damaged seal
Rear drive axle filler plug
Rear drive axle rear cover joint
Check oil level and correct as required
Install new components as required Pinpoint Tests

PINPOINT TEST A : EXCESSIVE DRIVELINE NOISE TEST
CONDITIONS DETAILS/RESULTS/ACTIONS A1: CHECK NOISE FROM VEHICLE ON ROAD TEST 1 Road test vehicle to determine load and speed conditions when noise occurs. 2 Assess the noise with different gears selected. Does the noise occur in different gears at the same vehicle speed? Yes
Install a new rear drive axle/differential assembly.
REFER to: Axle Assembly - V6 3.0L Petrol (205-02 Rear Drive Axle/Differential, Removal and Installation).
Re-test the system for normal operation.
No
Suspect the engine or transmission. For additional information, REFER to:
Engine - 3.0L/4.2L (303-00 Engine System - General Information, Diagnosis and Testing), Engine - 2.7L Diesel (303-00 Engine System - General Information, Diagnosis and Testing), Diagnostic Strategy (307-01A Automatic Transmission/Transaxle - V6 3.0L Petrol, Diagnosis and Testing).

Centre bearing retaining bolts 48 36 - Transmission flexible joint retaining bolts 127 94 - Rear drive axle CV joint retaining bolts 73 54 - Driveshaft heat shield retaining bolts 7 - 62

1 Transmission flexible joint 2 Collapsible front driveshaft tube 3 Splined slip joint 4 Center bearing 5 Universal joint 6 Rear driveshaft tube 7 Differential flexible joint

1 Transmission flexible joint 2 Collapsible front driveshaft tube 3 Splined slip joint 4 Center bearing 5 Universal joint 6 Rear driveshaft tube 7 Differential flexible joint

Differential fluid - vehicles without supercharger Castrol SAF XO (75W 90) Differential fluid - vehicles with supercharger Castrol BOT 720 (75W 90) Initial Specifications
Item Specification Differential fluid capacity - vehicles without supercharger 0.9 Liters Differential fluid capacity - vehicles with supercharger 1.3 Liters Service Specifications
Item Specification Differential fluid capacity - vehicles without supercharger 0.85 Liters Differential fluid capacity - vehicles with supercharger 1.25 Liters Torque Specifications
Description Nm lb-ft lb-in Differential case front retaining bolt 90 66 - Differential case rear retaining bolts 192 142 - Differential filler plug 27 20 - Differential drain plug 27 20 - Halfshaft constant velocity joint nut 300 221 - Driveshaft retaining bolts 73 54 - www.JagDocs.com