Spicer Single Drive Axles Service Manual: 34DS, 34RS, 38DS, 38RS, DS340, RS340, DS380, RS380, DS400, RS400, DS3 - Manual (Page 71)

Inter-Axle Differential Lockout Overhaul.
68
Ser
vice Procedure
Procedure - Assemble and Install Lockout
1. With shift fork and sliding clutch installed in power divider
cover, assemble and install lockout as follows:
2. Install seal ring on shift fork push rod (threaded end). Install
"O" ring in body.
3. Apply silicone gasket compound to lockout mounting sur-
face (see illustration).
4. Install lockout body, cap screws and lock washers. Torque
cap screws to 48-56 ft. lbs. (65-76 N.m).
5. Install felt oilers and "O" ring on piston. Install piston assem-
bly in body and secure to push rod with flat washer and nut.
Torque nut to 20-26 ft. lbs. (27-35 N.m).
Note: Before installation, soak piston felt oilers in SAE 30
engine oil and lubricate "O" rings with a high-viscosity
silicone oil or barium grease "O" ring lubricant.
6. Place "O" ring on body cover. Install compression spring,
cover, cap screws and lockwashers. Torque cap screws to
96-108 in. lbs. (10-12 N.m).
Lockout Silicone Gasket Pattern