Spicer Single Drive Axles Service Manual: 34DS, 34RS, 38DS, 38RS, DS340, RS340, DS380, RS380, DS400, RS400, DS3 - Manual (Page 16)

Lubrication
13
Filling
Remove the filler hole plug from the center of the axle housing cover and fill the axle with approved lubricant until level with the
bottom of the hole.
Forward axles: Add two pints (0.94 liters) of lubricant through filler hole at the top of the differential carrier near the power divider
cover.
Note: Lube fill capacities in the adjacent chart are good guidelines but will vary somewhat on the basis of the angle the axle is
installed in a particular chassis. Always use the filler hole as the final reference. If lube is level with the bottom of the hole,
the axle is properly filled.
Axle Installation Angles
Axles installed at angles exceeding 10 degrees or operated regularly in areas of continuous and lengthy grades may require stand-
pipes to allow proper fill levels.
For specific recommendations, contact your local Spicer representative. See back cover of this manual for phone numbers.
Forward Axle: Add an additional 2 pints (0.94 liters) axle lubricant through filler hole at the top of differential carrier near the power
divider cover.
Capacities listed are approximate. The amount of lubricant will vary with angle of axle as installed in vehicle chassis.
Oil Filler Hole at top of Differential Carrier Magnetic Strainer for Axle with Lube Pump
Lube Capacities, Dana Housings
Single Reduction Tandem Series Forward Axle Pints (liters) Rear Axle Pints (liters)
380(P), 381(P), 400-P, 401-P 39 (18.5) 36 (17.0)
402(P), 403(P),451-P 39 (18.5) 36 (17.0)