Ford Pick-Ups/Bronco 1976-1986 Repair Guide

Transfer Case



Dana 21 - SAE 50W engine oil
NP203 - below 32°F (0°C) SAE 30W engine oil; above 32°F SAE 50W engine oil
NP205 - 1976-77 SAE 50W engine oil; 1978 and later SAE 90W gear oil
NP208 - Dexron®II ATF
Borg-Warner1345 - Dexron®II ATF


Position the vehicle on level ground. Remove the transfer case fill plug located on the left side of the transfer case. The fluid level should be up to the fill hole. If lubricant doesn't run out when the plug is removed, add lubricant until it does run out and then replace the fill plug.


See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Transfer case filler and drain plug locations; NP208 shown

The transfer case is serviced at the same time and in the same manner as the transmission. On all but the NP203, clean the area around the filler and drain plugs and remove the filler plug on the side of the transfer case. Remove the drain plug on the bottom of the transfer case and allow the lubricant to drain completely. Clean and install the drain plug.

On the NP203, loosen the front and rear housing bolts and allow the fluid to drain. Tighten the bolts.

Add the proper lubricant. Install the filler plug.