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Eaton RSP40 Axles & Differentials For Sale

Shop new, used, and remanufactured Eaton RSP40 Axles & Differentials on MyLittleSalesman.com . Compare active listings with prices from $42 to $1,995. Sellers include Vander Haag's, Boots and Hank's Truck Parts, Holst Truck Parts, and more. Filter by condition, price, or year to find the Eaton RSP40 that fits your job.
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   Axle Assemblies, Rear (3)    Axle Housings, Front (1)    Axle Housings, Rear (78)    Axle Shafts (20)    Differential Misc. Parts (8)    Differentials, Front (1)    Differentials, Rear (335)
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Showing 1 - 25 of 446 Listings

1 - 25 of 446 listings
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Eaton RSP40 Rear Axle Housing for a Peterbilt 579

2014 Eaton RSP40 Rear Axle Housing for a Peterbilt 579

$950 USD
Eaton Rear Axle Housing, RSP40, w/ Torque Rod Bracket, 10 Hole Pilot, Air Drum ABS Brakes, STD Track. P/N 321319. Removed From 2014 Peterbilt Air Leaf Suspension
ConditionUsed
SuspensionAir Leaf
Fits To Make(s)PETERBILT
Fits To Model(s)579
Stock Number4462-6
MLS Number14319960
CategoryAxle Housings, Rear
Last Updated9/11/2026
Location
Fresno, CA, US
Sold By
Garabedian Equipment
(855) 794-___  SHOW
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Garabedian Equipment
Eaton RSP40 Rear Differential for a Peterbilt 384

2013 Eaton RSP40 Rear Differential for a Peterbilt 384

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RSP40 - Rear Rear - 4.11 Ratio - used - Grade C - rebuildable - DIFF ONLY. p/n 511332, Bad gear set, missing ring gear bolts, ring gear teeth are chipped, case looks good.
ConditionUsed
Rear End4.11 ratio
Fits To Make(s)PETERBILT
Fits To Model(s)384
Stock Number4424-3
MLS Number14305904
CategoryDifferentials, Rear
Last Updated9/11/2026
Location
Fresno, CA, US
Sold By
Garabedian Equipment
(855) 794-___  SHOW
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Garabedian Equipment
Eaton RSP40 Rear Differential for a 2013 Peterbilt 389

Eaton RSP40 Rear Differential for a 2013 Peterbilt 389

$550 USD
T.O RSP40 3.90 RATIO WILL INSPECT IN OUR GEAR SHOP, 90 DAY WARRANTY., Axle Spline Count: GET, Serial#: GET, Core Charge: 250.00, Ratio: 390
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)389
Will Fit Year(s)2013
Part NumberGET
Stock Number82126-3
MLS Number14588139
CategoryDifferentials, Rear
Last Updated9/5/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
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Holst Truck Parts
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