Special Service Message
NOTE: A Special Service Message is a formal communication issued by Land Rover and carries
the same importance of a Technical Service Bulletin. An SSM is a quick method of
communicating "Need To Know" information to the technical service community. SSM's may
be issued in advance of a technical bulletin or may be the only communication on a given
topic. All information contained in Land Rover technical communications are intended for
use by trained, professional technicians with the knowledge, tools, and equipment required
to complete the procedure correctly and safely. It informs the Technicians of conditions that
may occur on some vehicles, or provides information that could assist in correct vehicle and
diagnostic service.

SSM 74642 - 18MY-21MY L405 sensitivity to wheel vibration and
secondary r i de s ha ke
Models : Range Rover / L405
Engineer Name : Skingle Paul
Last Modified : 15 DEC 2020 09:27:21
Category : Noise Vibration
Symptom : 703000 Vibration Concerns
Content : Issue: Customers report a vibration felt
through the base of the driver’s seat
and are visually able to see the upper section
of the passenger seat shaking.
1. Confirm the customer symptom
2 . Where is the shake felt and/or observed?
3 . On what road surface is the shake or
vehicle vibration most apparent?
4 . At what vehicles speeds is the vehicle
shake most apparent?

Cause: Vehicle sensitivity to road input in
shake frequency range
Action:
1 . Check for any obvious signs of damage
or other issues that may cause the fault
observed.
2 . Wheel & Tyre optimisation3 . Complete: Steering Wheel
Vibration/Shimmy While Driving (204-00
Suspension System - General
Information, General Procedures). This is
using the IDU2 diagnostic tool.
4 . Record photographic evidence
of the output from the dealer diagnostic
tool.
5 . If the amount of steering
vibration/shimmy is considered
unacceptable following the initial road

test completed in the diagnostic
procedure, balance the wheel and tyre(s)
as necessary: Wheel and Tire Assembly
Balancing (204-00 Suspension System General Information, General Procedures).
6 . Record and provide photographic
evidence of RFV, R1H and balance values
7 . When fitting the wheels back onto the
vehicle, take photographic evidence of
RFV high spot being at the top
8 . Complete: Steering Wheel
Vibration/Shimmy While Driving (204-00
Suspension System - General
Information, General Procedures). This is
to assess the impact of the wheel
balancing procedure above
9 . Record photographic evidence of output
from dealer diagnostic tool.
Assessment- After adjustments, is
the concern now resolved/acceptable?
If so, hand vehicle back to the customer If
not, proceed to next step.
Return to step 5 in wheel/tyre
optimisation section.
Assessment- After adjustments is the concern
now resolved/acceptable. If so, hand vehicle
back to the customer
If the concern is not resolved but the dealer
diagnostic tool confirms the vehicle is free of
1st wheel order vibration, proceed to next
steps.
1 . If after the above steps the issue persists
raise a TA referencing
2 . Clear customer concern.
3 . Wheel & Tyre (RFV) Radial Force Variation
and balance values measured.
4 . Confirmation that all of the above has
been completed, detailing the evidence at
each step – including detailed answers to
the customer symptom section
5 . SSM Ref in the TA.

Jaguar Land Rover Limited 2000 - 2020 (Rel. 2685)