Forward Tandem Carrier
Differential Making Noise
TP-99125
16579/24240 Issued 12-99
Printed in the USA © Copyright Meritor Automotive, Inc., 1999 Page 4
Forward Tandem CarrierDifferential Making Noise
Disassemble
the inter-axle
differential case.
Damaged?
remanufactured
carrier.
Refer to MM 5L.
No
Check the ring gear
backlash and
record the reading.
Refer to MM 5L.
Yes
Yes
No
This flowchart continues
on the next page.
Repair the carrier
Damaged?
Bolted
Welded
Inter-axle
differential case
bolted or
welded
?
No
Damaged?
No
Check the input
shaft end play.
Refer to MM 5L.
Yes
End play
within spec?
Set the input
shaft end
play to spec.
Refer to MM 5L.
Inspect the
lubricant.
Refer to MM 1.
Contaminated?
No
No
Yes
Yes
Determine
the source of
contamination.
No
Noisy?
Return the
vehicle to
service.
Yes
No
Yes
Remove and
disassemble the input
shaft and inter-axle
differential assembly.
Refer to MM 5L.
Damaged?
No
Yes
Damaged or
contaminated?
No
Yes
Damaged?
Yes
Contaminated?
Inspect the input shaft
oil pump for damage
and the oil screen for
contamination. Refer to
TP-9955,
Failure
Analysis for Drive Axle
Components.
Inspect the inter-axle
differential assembly for
damage. Refer to TP-9955,
Failure Analysis for Drive
Axle Components
.
Inspect the main
differential bearings for
damage. Refer to TP-9955,
Failure Analysis for Drive
Axle Components
.
Visually inspect
the carrier in
the axle housing.
Remove the
carrier from the
axle housing.
Repair the carrier
or install a
remanufactured
carrier.
Drain and inspect
the lubricant.
Refer to MM 1.
Fill the carrier with
the correct amount
of the specified
lubricant. Refer to
MM 1. Test drive
the vehicle.
Remove the carrier
from the housing.
Refer to MM 5L.
Visually inspect the ring
gear and pinion for
damage. Refer to TP-9955,
Failure Analysis for
Drive Axle Components
.
Repair the carrier
or install a
remanufactured
carrier.
Refer to MM 5L.
Check for further carrier
damage. If none is found,
repair or replace the
oil pump, clean or replace
the oil screen and install
the carrier. Refer to MM 5L.
Check for further carrier
damage. If none is found,
replace the damaged
inter-axle differential
components and install the
carrier. Refer to MM 5L.
Inspect the
pinion gears
and spider.
Refer to
TP-9955,
Failure
Analysis for
Drive Axle
Components
.
Inspect the inter-axle
differential spider, side gears,
thrust washers and bearings.
Refer to TP-9955,
Failure Analysis for
Drive Axle Components
.
or install a
Check for further carrier
damage. If none is found,
replace the damaged
inter-axle differential
components and install the
carrier. Refer to MM 5L.
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