er’s manual. Meritor’s experience shows that the fol-
lowing additives (friction modifiers) perform ad-
equately:
A. For all GL–5 gear oils (mineral oil or synthetic)
other than Mobil, add any of the following (1.6
ounces [35 mL] of additive for each pint [0.5 L] of
lube capacity):
•
Elco No. 2 Friction Modifier (Elco Corpora-
tion).
•
Lubrizol No. 6178 (Lubrizol Corporation).
•
Hi–Tec E–336 (Edwin Cooper, Inc.).
•
Equa–Torque No. 2411 (Sta–Lube Corpora-
tion).
•
Equa–Torque No. 2414 (Sta–Lube Corpora-
tion).
B. For Mobilube HD (mineral oil) and Mobilube SHC
(synthetic) use Mobil No. 204 (Mobil Oil Corpora-
tion). Add 1.1 ounces [23 mL] of additive for
each pint [0.5 L] of lube capacity.
IMPORTANT: These friction modifiers generally
deteriorate faster than conventional extreme-
pressure additives, so the lubricant change
schedule must be shortened when using these
additives. The traction equalizer additive (and
recommended drive axle lubricant) must be
changed at the Maintenance 2 (M2) interval,
instead of the Maintenance 3 (M3) interval rec-
ommended in the Maintenance Operation Chart
for axles that require only those lubricants rec-
ommended in
Table 2
.
Axle Lubricant and Oil Filter
Replacement Procedure
1.
With the vehicle parked on level ground, apply
the parking brakes, and chock the tires.
2.
Remove the axle carrier fill plug (
Fig. 4
), then
remove the drain plug at the bottom of the hous-
ing and completely drain the lubricant while the
unit is warm. Allow sufficient time for all old lubri-
cant to drain. On tandem drive axles, it is also
necessary to remove the plug at the bottom of
the interaxle differential housing to drain the lu-
bricant.
3.
If so equipped, replace the axle oil filter.
IMPORTANT: When the drive unit is
equipped with an oil filter, the filter should be
replaced every time the oil is changed.
3.1
To remove the filter from the helical gear
cover, remove only the two relief valve
cover stud nuts and washers, then lift off
the filter cover. Do not remove the cap-
screws. See
Fig. 8
.
3.2
Remove the oil filter, using a suitable filter
strap wrench. See
Fig. 9
. Discard the
filter.
NOTE: There may be about one pint (0.5 L)
of lubricant remaining in the filter. Be careful
not to spill it when removing the filter.
f350090a
05/27/93
Fig. 8, Axle Oil Filter Cover Removal and Installation
f350119a
05/27/93
Fig. 9, Axle Oil Filter Removal
Rear Axle
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