Jeep Cherokee 1988 Quick Start Manual

1988 Positive Traction Differentials - Dana Power-Lok &
Trac-Lok
Jeep
DESCRIPTION
The limited slip differential uses 2 sets of multiple disc
clutches to control differential action. Dana produces 2 types of
positive traction differentials. The Power-Lok 4-pinion differential
is a split-case type. The Trac-Loc 2-pinion differential is a single-
case type.
OPERATION
When one or both wheels are on a low-traction surface such as
snow, ice or mud, the friction between the clutch plates will transfer
a portion of the usable torque to the wheel with the most traction.
The wheel on ice or snow will have a tendency to operate with the
opposite wheel in a combined driving effort.
AXLE RATIO & IDENTIFICATION
To determine axle ratio, see DRIVE AXLE RATIO IDENTIFICATION
in this section.
LUBRICATION
NOTE: Always use special positive traction differential lubricant
as specified by manufacturer.
DIAGNOSIS & TESTING
DANA 2-PINION TRAC-LOK
1) Drive vehicle to thoroughly warm up lubricant in rear
axle. Place a piece of slick paper over a smooth formica board. Ensure
formica board is on flat and level floor.
Fig. 1: Exploded View of Jeep Single-Case Dana Trac-Lok Differential
DIFFERENTIAL - DANA TRAC-LOK & POWER-LOK
1988 Jeep Cherokee