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Eaton RSP40 Axles & Differentials For Sale

The Eaton RSP40 ranges in price from as low as $42 up to $1,850 based on MyLittleSalesman.com marketplace data.
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Axles & Differentials (625)
   Axle Assemblies, Rear (3)    Axle Housings, Front (1)    Axle Housings, Rear (127)    Axle Shafts (15)    Differential Misc. Parts (9)    Differentials, Front (2)    Differentials, Rear (468)
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RSP40 (625)
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Eaton RSP40 Rear Axle Housing for a Kenworth T680

2016 Eaton RSP40 Rear Axle Housing for a Kenworth T680

Recently Updated
$750 USD
Eaton Rear Axle Housing, RSP40, w/ Torque Rod Bracket. 16 Hole Flange, 53.5" Inner Flange To Inner Flange, STD Track. P/N 321318. Removed From 2016 Kenworth AG400L Suspension.
ConditionUsed
Fits To Make(s)KENWORTH
Fits To Model(s)T680
Stock NumberUPS-277238-18
MLS Number14142967
CategoryAxle Housings, Rear
Last Updated3/21/2026
Location
Fresno, CA, US
Sold By
Garabedian Equipment
(855) 794-___  SHOW
NUMBERCall Seller
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Garabedian Equipment
Eaton RSP40 Rear Differential for a Mack Cxu

2008 Eaton RSP40 Rear Differential for a Mack Cxu

$375 USD
(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: 130946 RUST FORMING ON CRR CASING, SURFACE RUST ON RING GEAR COLLAR AND PINION GEAR.
ConditionUsed
Fits To Make(s)Mack
Fits To Model(s)CXU
Stock Number25786793
MLS Number13538936
CategoryDifferentials, Rear
Last Updated3/18/2026
Location
Spencer, IA, US
Sold By
Vander Haag's Inc.
(855) 370-___  SHOW
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Vander Haag's Inc.
Eaton RSP40 Rear Axle Housing for a Kenworth T680

2016 Eaton RSP40 Rear Axle Housing for a Kenworth T680

$750 USD
Eaton Rear Axle Housing, RSP40, w/ Torque Rod Bracket, 16 Hole Flange, 53.5" Inner Flange To Inner Flange, P/N 321318. Removed From 2016 Kenworth AG400L Suspension.
ConditionUsed
Fits To Make(s)KENWORTH
Fits To Model(s)T680
Stock NumberUPS-277298-20
MLS Number14140798
CategoryAxle Housings, Rear
Last Updated3/5/2026
Location
Fresno, CA, US
Sold By
Garabedian Equipment
(855) 794-___  SHOW
NUMBERCall Seller
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Garabedian Equipment
Eaton RSP40 Rear Axle Housing for a Kenworth T680

2016 Eaton RSP40 Rear Axle Housing for a Kenworth T680

$750 USD
Eaton Rear Axle Housing, RSP40, w/ Torque Rod Bracket, 16 Hole Flange, 53.5" Inner Flange to Inner Flange, STD Track. P/N 321318. Removed From 2016 Kenworth AG400L Suspension.
ConditionUsed
Fits To Make(s)KENWORTH
Fits To Model(s)T680
Stock NumberUPS-277239-17
MLS Number14143034
CategoryAxle Housings, Rear
Last Updated3/4/2026
Location
Fresno, CA, US
Sold By
Garabedian Equipment
(855) 794-___  SHOW
NUMBERCall Seller
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Garabedian Equipment
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