Vehicles built before 5GTDN136968105387

[Hi-Cap Hummer]

Owners manual supplement, "Filling the transfer case to the drain fill plug is no longer adequate. You need to add 0.25L (8.5 ounces) after you fill to fill plug. Install fill plug and add 0.25L through speed sensor hole per instructions on bottom of transfer case.
Another way I used is to jack up the drivers side and air down to 12 lb on passenger side of vehicle. This raises the fill plug in relation to the drain plug, I was able to add 0.25L ATF.

Since the transfer case only holds 1.6 qt, I changed it to Mobil 1 Synthetic ATF, approved for H Specification. Since I do it myself, only the best for the H3.