General Description

Shift Pattern And Procedure:

PURPOSE
The transfer case is used to provide a means of power flow to the front axle. The transfer case also provides a means of disconnecting the front axle, providing better fuel economy and quieter operation when the vehicle is driven on roads where four wheel drive is not required. In addition, the transfer case provides an additional gear reduction when placed in low range. This is useful when difficult off road conditions are encountered.

OPERATION
A floor-mounted shift lever is used to select the operating range. The shift pattern is shown in figure 1. Indicator lamps on the floor console show the current mode of operation. When four-wheel drive has been selected, the four-wheel drive indicator lamp is designed to turn on when the front axle has engaged. A slight delay before the front axle indicator lamp comes on is normal.

CONSTRUCTION
The model 231 is an aluminum case, chain-driven unit with four modes of operations: neutral, two-wheel drive high range, four-wheel drive high range, and four-wheel drive low range. Gear reduction for low range is provided by a planetary gear set.