Inspection the Detroit® Automated Transmission Fluid Level
Notice: Operating a transmission with the fluid level higher or lower than recommended can result in transmission damage. Do not overfill the transmission. Overfilling will force fluid out of the case through the main shaft openings.
Do not mix types or brands of fluid, because of possible incompatibility. Do not use fluid additives, friction modifiers, or extreme-pressure gear fluids.
With the transmission at operating temperature, and the vehicle on a level surface, check the fluid level in the transmission.
- Clean the area around the fill plug, then remove it from
the side of the gear case. See Fig..
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Fill Plug
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Drain Plug
Fig. 1, Drain and Fill Plugs, Detroit Automated Transmissions
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- Using your finger or a bent pipe cleaner, see if the fluid
is level with the fill opening. See Fig..
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Full
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Low
Fig. 2, Checking Transmission Fluid Level
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- If the fluid level is low, check the transmission for leaks, and correct as needed.
- If needed, add the recommended fluid until it is level with the lower edge of the fill opening. See the Transmission Fluid Service Information brochure at http://dtna.info/DT12FluidsManual for approved transmission lubricants.
- Clean the fill plug and install a new seal on it. Install the plug in the side of the gear case, then tighten it 45 lbf·ft (60 N·m).
Notice: Detroit transmissions use synthetic lubricant that meets specific requirements. To see a list of approved lubricants and information to identify which transmissions they can be used with, see the Transmission Fluid Service Information brochure at http://dtna.info/DT12FluidsManual.