Input Shaft
The input shaft splines (6) are mated to and driven by the transmission differential housing. The rotational speed of the input shaft is the same as the transmission output. Installed into the transfer case housing are two opposing input shaft front seals (1). The two input shaft front seals are designed to restrict transmission oil from entering the transfer case as well as restrict transfer case oil from entering the transmission. The opposite or rear end of the input shaft is sealed by a double-lip intermediate shaft seal (5). The intermediate shaft seal (5) is installed into the output end of the rear extension housing and is designed to restrict oil, dirt, and debris from entering the transfer case. The helical gear teeth of the input shaft (3) are engaged to the helical gear teeth of the idler shaft. The input shaft is mounted in two tapered roller bearings (2, 4). The bearings are given the correct preload during assembly by means of shims being fitted behind the bearing races in the housing and cover.