Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 6)

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General Information
Model Listing
The following models are included in this publication:
The suffix letter "P" in the model number indicates the axle is
equipped with a lube pump which provides positive lubrication
in the inter-axle differential and other power divider parts.
Model variations and parts identification information is includ-
ed throughout this manual. For more detailed parts informa-
tion, refer to your Dana parts books.
Forward Axle Rear Axle Load Capacity
DP440-P 44,000 lbs.
DS440-P RS440
DT440-P
DP460-P 46,000 lbs.
DS460-P RS460
DT460-P
DD461-P RD461
DP461-P
DS461-P RS461
DT461-P
DP480-P 48,000 lbs.
DS480-P RS480
DT480-P
DP485-P
DT485-P
DD521-P RD521 52,000 lbs.
DP521-P
DS521-P RS521
DT521-P
DP580-P 58,000 lbs.
DD581-P RD581
DS581-P RS581
DP581-P
DP601-P 60,000 lbs
DT601-P
DP650-P 65,000 lbs
DP651-P
DT461-P
DP652-P