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NOTE: Meritor recommends using magnetic
plugs with elements having a minimum pickup
capacity of 2 pounds (1 kg) of low-carbon steel,
in plate or bar form. Magnets will rapidly lose
effectiveness as collected material bridges the
gap between the two poles. Clean or change
the plugs before this occurs. It may be neces-
sary to clean or change the plugs one or more
times between lubrication change intervals.
4. After cleaning the drain plugs, install and tighten
them 35 lbf·ft (47 N·m).
Axle Filling
1. With the vehicle on a level surface, fill the axle
housings to the bottom of the oil fill hole (in the
carrier or housing) with lubricant. See Table 1 for
approved axle lubricants and see Table 2 or
Table 3 for axle capacities.
NOTE: Meritor axles have a small tapped and
plugged hole located near and below the hous-
ing oil fill hole. This smaller hole is for the lubri-
cant temperature sensor only, and must not be
used as a fill or level hole.
2. Install the fill hole plug, and tighten it 35 lbf·ft (47
N·m).
3. After filling the carrier and housing assembly with
lubricant, drive the vehicle, unloaded, for 1 or 2
miles (2 or 3 kilometers) at speeds not to exceed
25 mph (40 km/h), to thoroughly circulate the
lubricant throughout the assembly.
35–04 Two-Speed-Axle Shift
Unit Oil Level Checking
CAUTION
Failure to keep lubricant at the specified level
could cause damage to the axle shift unit.
1. Clean the oil fill hole plug in the shift unit housing
cover, and the area surrounding it. See Fig. 2.
Remove the fill hole plug.
2. The lubricant level should be maintained at the
bottom of the fill hole. If low, add the specified
lubricant.
CAUTION
Before adding additional lubricant, make sure of
the type currently in the shift unit. To prevent
component damage, do not mix engine oil with
automatic transmission fluid.
IMPORTANT: When the vehicle operating tem-
peratures are above 0°F (–18°C), use SAE 10
heavy-duty engine oil, API service classification
SD (sulfated ash content must not exceed
1.85%). When the vehicle operating tempera-
tures are below 0°F (–18°C), use one part of
kerosene to three parts of SAE 10 heavy-duty
engine oil, API service classification SD (sul-
fated ash content must not exceed 1.85%). This
cold-weather mixture can be safely used up to
32°F (0°C).
Commercially available automatic transmission
fluid may be used in place of SAE 10 engine oil.
Automatic transmission fluid can be used for all
temperatures. Do not mix kerosene with auto-
matic transmission fluid.
3. Apply a small amount of Loctite
®
242, or equiva-
lent sealant, to the threads of the fill hole plug.
Install the fill hole plug finger-tight; then, using a
wrench, tighten the plug 1-1/2 turns more.
f350021a
08/06/93
1
2
3
1. Housing Cover Gasket
2. Oil Fill Hole Plug
3. Shift Unit Housing Cover
Fig. 2, Two-Speed-Axle Shift Unit
Rear Axle 35
Acterra Maintenance Manual, March 2000 35/3