Meritor TP-9579 Technical Bulletin page 6

Driver Instructions
Locking the IAD
When encountering poor road or highway conditions where a
decrease in traction is anticipated, follow the recommended
procedures:
1. Let up momentarily on the accelerator to relieve torque on the
gearing and any spinning conditions.
2. Flip the IAD switch to the "LOCK" position. The differential lock
will engage.
3. Proceed to drive cautiously.
Meritor Heavy Vehicle Systems, LLC
2135 West Maple Road
Troy, MI 48084 U.S.A.
866-OnTrac1 (668-7221)
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Information contained in this publication was in effect at the time the publication was approved for printing and is subject to
change without notice or liability. Meritor Heavy Vehicle Systems, LLC, reserves the right to revise the information presented or
to discontinue the production of parts described at any time.
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Meritor, Inc.
All Rights Reserved
Unlocking the IAD
When poor road or highway conditions have passed, follow these
steps to UNLOCK the IAD:
1. Flip the switch to the "UNLOCK" position while maintaining
vehicle speed.
2. Let up momentarily on the accelerator. The differential lock will
promptly disengage.
3. Resume a safe vehicle speed.
Printed in the USA
TP-9647
Revised 11-18
(16579)