Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 50
Published: 11-May-2011
Driveline System - General Information - Driveline System
Diagnosis and Testing
Inspection and Verification
Certain driveline conditions are also common to the engine, transaxle, transfer case, wheel bearings, wheels and tires and other parts of
the vehicle. For this reason, make sure the cause of the trouble is in the driveline before adjusting, repairing or installing any new
components. For additional information, refer to Section
100-04 Noise, Vibration and Harshness
.
1. Verify the customer concern by carrying out a road test of the vehicle.
1.
2. Visually inspect for obvious signs of mechanical damage.
2.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next
step.
3.
4. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.
4.
Transfer Case, Front Transaxle and Axle Noise
Gear Howl and Whine
Howling or whining of the ring gear and drive pinion are 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. 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.
Knock
Knock, which can occur on all driving phases, has several causes including damaged teeth or gearset.
A gear tooth damaged on the drive side is a common cause of the knock.
Clunk
Clunk is a metallic noise heard when the automatic transaxle is engaged in REVERSE or DRIVE. The noise may also occur when the throttle
is applied or released. Clunk is caused by backlash in the driveline or loose suspension components.
Bearing Rumble
Bearing rumble 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 may also be high-pitched, similar to gear noise, but will be evident in all four driving
modes.
Symptom Chart
Symptom
Possible Sources
Action
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1
2
Noise is at constant tone
over a narrow vehicle speed
range. Usually heard on
light driving and coasting
conditions
Rear drive differential.
Transfercase.
Transaxle.
For additional information, refer to Pinpoint Test A
Noise is the same on
driving or coasting.
Road.
W heel bearing.
Normal conditions.
CHECK and INSTALL a new wheel bearing as necessary. For
additional information, refer to Section
204-02 Rear
Suspension
.
W orn or damaged driveshaft joint.
INSTALL new components as necessary.
Driveshaft center bearing.
INSTALL new components as necessary.
Noise is produced with the
vehicle standing and driving
Engine
For additional information, refer to Section
303-00 Engine
System - General Information
.
Transmission
For additional information, refer to Section
307-01A
Automatic Transmission/Transaxle
Section
307-01B
Automatic Transmission/Transaxle
. For additional
information, refer to Section
308-03 Manual
Transmission/Transaxle
.
Noise is more pronounced
while turning
Front or rear differential side gears and pinion
gears.
For additional information, refer to Section
205-02 Rear
Drive Axle/Differential
and Section
308-07 Transfer Case
.
Loud clunk in the driveline
when Shifting from Reverse
to Drive.
Engine idle speed set too high.
Engine mount.
CHECK and adjust as necessary.
INSPECT and INSTALL new engine mounts as necessary.
Transaxle Mount.
INSPECT and INSTALL new transaxle mounts as necessary.
Transaxle.
For additional information, refer to Section
307-01A
Automatic Transmission/Transaxle
Section
307-01B
Automatic Transmission/Transaxle
andSection
308-03
Manual Transmission/Transaxle
.
Suspension.
INSPECT and INSTALL new suspension components as
necessary.
Backlash in the driveline.
INSTALL new components as necessary.
Clicking, popping or
grinding noises
Inadequate or contaminated lubrication in the
constant velocity (CV) joints.
Another component contacting the axle shaft.
W heel bearings, brakes or suspension
components.
INSPECT, CLEAN and LUBRICATE with new grease as
necessary.
INSPECT and REPAIR as necessary.
INSPECT and INSTALL new components as necessary.
Vibration at high speeds.
Out-of-balance wheels and tires.
INSTALL new wheels and tires as necessary. For additional
information, refer toSection
204-04 Wheels and Tires
.
Driveline out of balance/misalignment.
For additional information, refer to the approved Jaguar
diagnostic system.
Shudder or vibration during
acceleration.
Powertrain/driveline misalignment.
CHECK for misalignment. INSTALL new components as
necessary.
High CV joint operating angles caused by
incorrect ride height.
CHECK the ride height and VERIFY the correct spring rate.
INSTALL new components as necessary.
Lubricant leak.
Transaxle, transfer case or rear drive
differential vent.
INSTALL new components as necessary.
Transaxle halfshaft seal, transfer case
halfshaft seal, transaxle to transfer case
O/ring seal, transfer case drive pinion seal,
rear drive differential pinion seal or rear drive
halfshaft seal.
INSTALL new components as necessary.
Filler plug.
INSTALL new components as necessary.
Axle rear cover joint.
INSTALL new components as necessary.
PINPOINT TEST A : EXCESSIVE DRIVELINE NOISE
TEST
CONDITIONS
DETAILS/RESULTS/ACTIONS
A1: CHECK NOISE FROM VEHICLE ON ROAD TEST
Road test vehicle to determine load and speed conditions when noise occurs.
Assess the noise with different gears selected.
Does the noise occur at the same vehicle speed?
Yes
INSTALL a new final drive. TEST the system for normal operation
No
REFER to Section
204-04 W heels and Tires
, Section
205-01 Driveshaft
,Section
205-04 Front Drive Halfshafts
, Section
205-05 Rear Drive Halfshafts
, Section
303-00 Engine System - General Information
, Section
307-01A Automatic
Transmission/Transaxle
Section
307-01B Automatic Transmission/Transaxle
, Section
308-03 Manual
Transmission/Transaxle
andSection
308-07 Transfer Case
.
Published: 11-May-2011
Driveshaft -
Torque Specifications
Description
Nm
lb-ft
lb-in
Driveshaft center bearing retaining bolts
25
18
-
Driveshaft front universal joint retaining bolts
44
32
-
Driveshaft rear universal joint retaining bolts
44
32
-
Published: 11-May-2011
Driveshaft - Driveshaft
Description and Operation
Item
Part Number
Description
1
—
Link washer
2
—
Driveshaft universal joint retaining bolt
3
—
Driveshaft front collapsible tube
4
—
Driveshaft center bearing
5
—
Driveshaft universal joint retaining bolt
6
—
Link washer
7
—
Paper gasket
8
—
Driveshaft rear universal joint
9
—
Driveshaft rear tube
10
—
Driveshaft front universal joint
11
—
Paper gasket
WARNING: Under no circumstances must a 2004.25 MY or earlier driveshaft assembly be fitted to a later vehicle. Failure to follow this
instruction may result in personal injury.
CAUTION: To preserve 'drive line' refinement, individual parts, other than fixings, MUST NOT be renewed. In the event of any balance
or driveshaft component related concern, the complete assembly must be renewed. Under no circumstances may the universal joint be
removed from the driveshaft (or its fixings be loosened). Do not drop or subject the driveshaft to damage.
• NOTE: 2004.25 MY driveshaft assemblies may be fitted to earlier model year vehicles. For modification details refer to
Driveshaft
in this
section.
• NOTE: All driveshaft assemblies are balanced. If undercoating the vehicle, protect the driveshaft, universal joints and the drive half shafts
to prevent over-spray of the undercoating material.
The driveshaft consists of the following:
A two piece welded steel tube.
A center bearing.
Two universal joints.
Universal Joint
The universal joints are:
A lubed-for-life design and require no lubrication in service.
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