Detroit® New Final Drive
- Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
- If the vehicle has just been driven, allow a few minutes for the lubricant to settle.
- Clean the fill plug and the area surrounding the fill plug on the side of the axle carrier. Remove the plug. Check lubricant level when the axle is cold, or near room temperature.
- Check that the lubricant is level with the bottom of the
fill hole. See Fig. if low, check for oil leaks, and correct as needed. Add oil to the
level of the fill plug, using the lubricant recommended in Table..
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Correct (lube level at bottom of fill hole)
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Incorrect (lube level below fill hole)
Fig. 1, Axle Lubricant Level Inspection
Table 1, New Final Drive Oil Capacity, New Final Drive
New Final Drive Oil Capacity, New Final Drive Axle Type Oil in Hubs (2) Oil in Axle NFD Model 4 Forward Axle TP
1.8 L
9 L
NFD Model 4 Rear Rear Axle TP
1.8 L
7.5 L
NFD Model 4 Forward Axle SP
1.8 L
14 L
NFD Model 4 Rear Rear Axle SP
1.8 L
11 L
NFD Model 6 TP
1.8 L
9.5 L
NFD Model 6 SP
1.8 L
11 L
Table 1, New Final Drive Oil Capacity, New Final Drive
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- Install and tighten the fill plug 30 lbf·ft (41 N·m).
- Check the axle housing breather. See Fig.. Make sure that it is open and unclogged. If the breather
is plugged or damaged, clean or replace it as needed.
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Front View
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Rear View
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Axle Breather
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Breather Hose
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Temperature Sensor Port
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Oil Fill Plug
Fig. 2, Detroit Model 4 and Model 6 Tandem Axle (forward axle shown)
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Important: A lubricant level close enough to be seen or touched is not sufficient. It must be level with the bottom of the fill hole.
Important: Always check the axle breather whenever checking the lubricant level. Check the breather more frequently under adverse operating conditions.