Spicer Tandem Drive Axle: DS_RS461, 462, 463, 521, 581, DT_RT_DP_RP461, 462, 463, 521, 581, 601, 651 - Manual (Page 40)

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461, 521, 581, 601 Forward/Rear Housings
All drive axles are mounted in Spicer fabricated steel axle housings. These housings are developed to meet specific OEM
requirements for dimensions, suspension mounting and brakes. Many of the most commonly-used housings are referenced in
the accompanying parts list along with the OEMs currently specifying them. If the housing being replaced is not listed and
replacement is necessary, provide the truck dealer with the following information:
a. Information from metal tag.
b. Year, made and model of the
truck.
c. Axle model and ground loading
capacity.
d. Axle specification number.
e. Type of brakes used.
651 Housings
These tandem drive axles are mounted in Spicer cast steel axle housings and are fitted with a wide variety of suspension
mounting bracketry on the basis of OEM specification. Should replacement of the housing become necessary, provide the truck
dealer with the housing subassembly number (SA No. - see drawing for location).
If this number is not available, provide the truck dealer with as much as the following information as possible:
a. Axle specification number
b. Year, make and model of the truck
c. Axle, model and ground-loading capacity
d. Type suspension (if known)
Axle Housings & Shafts
PT NO.
HSG MODEL
HSG CAP.
SERIAL NO..
LBS.
Identification Tag Axle Specification Number XXXXXXX
X X X XX
Housing Subassembly Number SA XXXXXX
including tubes
XXXXX
XXXXX
Axle Specification Number S XXXXXX