NP203 Transfer Case
The easiest way to drain the case is to pull the bottom two cover bolts and let the fluid pour out. After the shift linkage and driveshafts were unhooked and secured out of the way, the adapter-to-transfer-case bolts were removed and the case was slid backward a little so the transmission fluid could drain from the adapter housing. Make sure the unit is well supported on a transmission jack when you do this, since the NP203 weighs around 300 pounds. While our model had no mounts on the case itself, some rigs have struts or brackets on the side that must also be removed. View Related Article
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