Eaton RSP40 Axles &amp; Differentials For Sale

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Eaton RSP40 Rear Differential

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RSP40 Ratio:3.70, Ratio: 3.70

Condition	Used
Rear End	3.70 ratio
Stock Number	ATC2621
MLS Number	14423810
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Alma, AR, US
Sold By	Arkansas Truck Center

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Eaton RSP40 Rear Differential

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RSP40 Ratio:3.36, Ratio: 3.36

Condition	Used
Rear End	3.36 ratio
Stock Number	ATC2619
MLS Number	14423808
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Alma, AR, US
Sold By	Arkansas Truck Center

Eaton RSP40 Rear Differential

$1,495 USD

REBUILT EATON RSP40 REAR DIFFERENTIAL RATIO: 4.11

Condition	Remanufactured
Rear End	4.11 ratio
Stock Number	100056
MLS Number	14413305
Category	Differentials, Rear
Last Updated	6/9/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

2017 Eaton RSP40 Rear Differential for a Peterbilt 579

$375 USD

(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: CANNOT VERIFY

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	26005182
MLS Number	14396396
Category	Differentials, Rear
Last Updated	6/5/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

Eaton RSP40 Rear Differential

$795 USD

USED EATON RSP40 REAR DIFFERENTIAL RATIO: 3.70

Condition	Used
Rear End	3.70 ratio
Stock Number	100054
MLS Number	14402210
Category	Differentials, Rear
Last Updated	6/2/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

Eaton RSP40 Rear Differential

$795 USD

USED RSP40 EATON REAR DIFFERENTIAL RATIO: 3.70

Condition	Used
Rear End	3.70 ratio
Stock Number	95828
MLS Number	13018330
Category	Differentials, Rear
Last Updated	6/2/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

Eaton RSP40 Rear Differential

$795 USD

Used Eaton RSP40 REAR differential Ratio: 3.36

Condition	Used
Rear End	3.36 ratio
Stock Number	93736
MLS Number	12837654
Category	Differentials, Rear
Last Updated	6/2/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

2019 Eaton RSP40 Rear Differential for a Kenworth T680

$415 USD

(USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: -

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Stock Number	26005395
MLS Number	14398510
Category	Differentials, Rear
Last Updated	5/30/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2005 Eaton RSP40 Rear Differential for a Peterbilt 387

$415 USD

(USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Stock Number	25995551
MLS Number	14396542
Category	Differentials, Rear
Last Updated	5/29/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

2006 Eaton RSP40 Rear Differential for a Peterbilt 387

$395 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Stock Number	26003979
MLS Number	14394122
Category	Differentials, Rear
Last Updated	5/28/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2009 Eaton RSP40 Rear Differential for a Peterbilt 386

$395 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Stock Number	25986883
MLS Number	14348074
Category	Differentials, Rear
Last Updated	5/24/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2014 Eaton RSP40 Rear Differential for a Peterbilt 579

$395 USD

(USED) Eaton RSP40 Ratio: 3.42 Side Gear Splines: 41 W/ Locker: NO Cast#: NFDI11F3

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25996356
MLS Number	14371283
Category	Differentials, Rear
Last Updated	5/24/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2014 Eaton RSP40 Rear Axle Housing for a Peterbilt 579

$850 USD

(USED) Eaton RSP40 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: PETE FLEX AIR Track Width : 73 HEAVILY RUSTED

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25996363
MLS Number	14371280
Category	Axle Housings, Rear
Last Updated	5/24/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2012 Eaton RSP40 Rear Axle Housing for a Kenworth T660

$850 USD

(USED) Eaton RSP40 Brake Type: AIR DRUM Suspension: AG400L Track Width : 72

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T660
Stock Number	25996565
MLS Number	14371245
Category	Axle Housings, Rear
Last Updated	5/24/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2013 Eaton RSP40 Right Axle Shaft for a Peterbilt 384

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Passenger Side RSP40 Axle Shaft.

Condition	Used
Fits To Make(s)	PETERBILT
Fits To Model(s)	384
Side	Right
Stock Number	4424-17
MLS Number	14305917
Category	Axle Shafts
Last Updated	5/16/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

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2013 Eaton RSP40 Left Axle Shaft for a Peterbilt 384

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Driver Side RSP40 Axle Shaft

Condition	Used
Fits To Make(s)	PETERBILT
Fits To Model(s)	384
Side	Left
Stock Number	4424-16
MLS Number	14305916
Category	Axle Shafts
Last Updated	5/16/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RSP40 Rear Differential

$795 USD

RSP40 4.88 GOOD INSPECTED TAKEOUT, 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Serial#: NA, Core Charge: 250.00, Ratio: 4.88

Condition	Used
Rear End	4.88 ratio
Part Number	RSP41 RSP40 RS404
Stock Number	KL488
MLS Number	13311496
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Differential for a 2012 Peterbilt 384

$795 USD

RSP40 5.29 GOOD USED INSPECTED DIFFERENTIAL ASSEMBLY 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Serial#: NA, Core Charge: 250.00, Ratio: 5.29

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	384
Will Fit Year(s)	2012
Part Number	RSP-40
Stock Number	82723-10
MLS Number	12288565
Category	Differentials, Rear
Last Updated	6/13/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Axle Housing for a 2013 Kenworth T800

$1,495 USD

GOOD USED HOUSING ASSEMBLY/ PACCAR LATE LOW AIR LEAF AG400L, Serial#: NA, Hub Bolts: 10, Suspension: AG400L, Brake Type: DRUM

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T800
Will Fit Year(s)	2013
Part Number	NA
Stock Number	61823-1
MLS Number	12171137
Category	Axle Housings, Rear
Last Updated	5/15/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

2005 Eaton RSP40 Rear Axle Housing

$1,495 USD

Nice AG400/200 rear housing RSP 40, 41 No rust, Surfaces look good, Hub Bolts: 10, Suspension: Ag400, Brake Type: S cam

Condition	Used
Will Fit Year(s)	2005
Part Number	Ag200
Stock Number	P-60274
MLS Number	11585759
Category	Axle Housings, Rear
Last Updated	5/15/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Axle Housing for a 2003 Kenworth T800

$895 USD

GOOD USED AG400/AG200 REAR REAR AXLE HOUSING, MINOR RUST ON CENTER COVER RS404 RSP41 RSH40, Serial#: Na, Core Charge: Na, Hub Bolts: 10, Suspension: AG200

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T800
Will Fit Year(s)	2003
Part Number	Get
Stock Number	P-563
MLS Number	9324168
Category	Axle Housings, Rear
Last Updated	5/14/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Axle Housing for a 2007 Peterbilt 387

$1,095 USD

USED PETERBILT FLEXAIR AG380 BARE AXLE HOUSING - Differential Make (Rear): Eaton - Differential Model (Rear): RSP40, Hub Bolts: 10, Suspension: AG380 FLEX AIR, Brake Type: S CAM

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Will Fit Year(s)	2007
Part Number	Na
Stock Number	102215-14
MLS Number	9001516
Category	Axle Housings, Rear
Last Updated	5/14/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Axle Housing for a 2010 Kenworth T660

$1,095 USD

GOOD USED AG400 AG200 AXLE HOUSING FITS RS404

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T660
Will Fit Year(s)	2010
Stock Number	122414-1-1
MLS Number	9001484
Category	Axle Housings, Rear
Last Updated	5/14/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RSP40 Rear Differential for a 2014 Peterbilt 579

$895 USD

Good low mile diff 90 day warr. Ext warr available, Ratio: 3.36

Condition	Used
Rear End	3.36 ratio
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Will Fit Year(s)	2014
Stock Number	3615-10
MLS Number	9001110
Category	Differentials, Rear
Last Updated	5/14/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts