Cause
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Correction
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Drain and fill the unit with new oil with ultraviolet dye
J 28431-6
Fluorescent Oil Dye - 6 1-oz before using the
J 28428-E
High-Intensity Black Light Kit , when inspecting for leaks.
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Drain plug or fill plug leak
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1.
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Inspect for dirty, worn, scored sealing surfaces, or missing drain and/or fill plug sealing washers.
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Restricted or damaged ventilation hose assembly
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Replace the ventilation hose assembly, as required.
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Leaking at the transfer case left side weep hole
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A transmission oil leak at the transfer case weep hole area is caused by the transmission right side drive shaft seal.
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•
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A gear oil leak at the transfer case weep hole area is caused by the transfer case input shaft front (inner) seal.
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Replace components as required.
If the leak is transmission or O-ring related, do not replace the transfer case input shaft seals.
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Leaking at the transfer case right side weep hole
A transmission or gear oil leak at the transfer case right side weep hole is caused by the input shaft seal located in the rear extension housing.
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Replace the input shaft seal.
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Leaking ATF at the right side axle shaft-to-intermediate shaft bearing location
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Replace the intermediate shaft seal located in the rear extension housing.
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Leaking at rear output shaft area
A leak at rear output shaft area is caused by either the rear output shaft seal or the rear output shaft housing O-ring seal.
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Inspect and replace the rear output shaft seal as required.
The O-ring is not serviceable on AAM transfer case.
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Leaking at transaxle assembly-to-transfer case interface
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A transmission oil leak at the transmission-to-transfer case interface may be caused by the transmission-to-transfer case o-ring seal.
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•
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A transmission oil leak at the transfer case weep hole area is caused by the transmission right side drive shaft seal.
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•
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A gear oil leak at the transfer case weep hole area is caused by the transfer case input shaft front (inner) seal.
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1.
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Note
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If the leak is transmission or O-ring related, do not replace the transfer case input shaft seals.
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Identify the type of oil leak.
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2.
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Replace components as required.
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Case half seam leak AAM
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Disassemble and replace the transfer case-to-rear extension housing O-ring seal.
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Leaking through case
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•
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Inspect for a cracked case.
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•
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Inspect for case porosity.
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