Eaton RSP40 Rear Differentials For Sale by Dealerships

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Truck Parts

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Differentials, Rear

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Eaton

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RSP40

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Dealerships

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2009 Eaton RSP40 Rear Differential for a Peterbilt 386

$375 USD

(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: 09007

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Stock Number	25919071
MLS Number	14095770
Category	Differentials, Rear
Last Updated	1/17/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

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2013 Eaton RSP40 Rear Differential for a Peterbilt 384

$375 USD

(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: NA

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	384
Stock Number	25894034
MLS Number	13974234
Category	Differentials, Rear
Last Updated	1/9/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2013 Eaton RSP40 Rear Differential for a Peterbilt 365

$350 USD

(USED) Eaton RSP40 Ratio: 3.08 Side Gear Splines: 41 W/ Locker: NO Cast#: -

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	365
Stock Number	25888292
MLS Number	13965078
Category	Differentials, Rear
Last Updated	1/7/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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2007 Eaton RSP40 Rear Differential for a Peterbilt 379

$350 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)	379
Stock Number	25918529
MLS Number	14068789
Category	Differentials, Rear
Last Updated	1/4/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

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2004 Eaton RSP40 Rear Differential for a Peterbilt 387

$350 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: Could Not verify COULD NOT GET CAST NO. CASE VERY RUSTY

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Stock Number	25858800
MLS Number	13799230
Category	Differentials, Rear
Last Updated	12/29/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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Eaton RSP40 Rear Differential

$1,495 USD

REBUILT EATON RSP40 REAR DIFFERENTIAL RATIO: 3.36

Condition	Remanufactured
Rear End	3.36 ratio
Stock Number	99737
MLS Number	14063089
Category	Differentials, Rear
Last Updated	12/28/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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2015 Eaton RSP40 Rear Differential for a Kenworth T680

$795 USD

USED EATON RSP40 REAR DIFFERENTIAL ASSEMBLY - RATIO: 3.25

Condition	Used
Rear End	3.25 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T680
Stock Number	63093
MLS Number	14062566
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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Eaton RSP40 Rear Differential

$1,250 USD

REBUILT 1 YEAR WARRANTY!!!

Condition	Used
Rear End	3.70 ratio
Stock Number	27247
MLS Number	12622281
Category	Differentials, Rear
Last Updated	12/25/2025
Location	Douglas, GA, US
Sold By	American Truck Parts, Inc.

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2007 Eaton RSP40 Rear Differential for a Peterbilt 387

$375 USD

(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Stock Number	25906885
MLS Number	14054486
Category	Differentials, Rear
Last Updated	12/21/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2009 Eaton RSP40 Rear Differential for a Peterbilt 386

$350 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	25897978
MLS Number	13986470
Category	Differentials, Rear
Last Updated	12/24/2025
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

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2004 Eaton RSP40 Rear Differential for a Kenworth T800

$375 USD

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

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T800
Stock Number	25875089
MLS Number	13868666
Category	Differentials, Rear
Last Updated	12/7/2025
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

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2012 Eaton RSP40 Rear Differential for a Kenworth T660

$300 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 511329

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T660
Stock Number	25841346
MLS Number	13997480
Category	Differentials, Rear
Last Updated	12/4/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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2015 Eaton RSP40 Rear Differential for a Peterbilt 579

$350 USD

(USED) Eaton RSP40 Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: NA

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25841608
MLS Number	14014871
Category	Differentials, Rear
Last Updated	12/4/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2012 Eaton RSP40 Rear Differential for a Peterbilt 587

$415 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	587
Stock Number	25898389
MLS Number	14014829
Category	Differentials, Rear
Last Updated	12/4/2025
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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2016 Eaton RSP40 Rear Differential for a Peterbilt 579

$350 USD

(USED) Eaton RSP40 Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: 511323

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25851913
MLS Number	13789546
Category	Differentials, Rear
Last Updated	11/27/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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Eaton RSP40 Rear Differential

$795 USD

Used Eaton Front Differential P/N: RSP40, Ratio: 3.55

Condition	Used
Rear End	3.55 ratio
Stock Number	94523
MLS Number	12877507
Category	Differentials, Rear
Last Updated	11/20/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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2016 Eaton RSP40 Rear Differential for a Kenworth T680

$350 USD

(USED) Eaton RSP40 Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: VERIFIY

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Stock Number	25893553
MLS Number	13986570
Category	Differentials, Rear
Last Updated	11/16/2025
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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2016 Eaton RSP40 Rear Differential for a Kenworth T440

$574 USD

(USED) Eaton RSP40 Ratio: 4.33 Side Gear Splines: 41 W/ Locker: NO Cast#: NA

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T440
Stock Number	25897094
MLS Number	13983089
Category	Differentials, Rear
Last Updated	11/14/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2006 Eaton RSP40 Rear Differential for a Kenworth T600

$415 USD

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

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T600
Stock Number	25875020
MLS Number	13915509
Category	Differentials, Rear
Last Updated	11/6/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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2007 Eaton RSP40 Rear Differential for a Freightliner Columbia 120

$317 USD

(USED) Eaton RSP40 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	Columbia 120
Stock Number	25889183
MLS Number	13968310
Category	Differentials, Rear
Last Updated	11/6/2025
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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Eaton RSP40 Rear Differential

$1,495 USD

REBUILT EATON RSP40 REAR DIFFERENTIAL RATIO: 3.42

Condition	Remanufactured
Rear End	3.42 ratio
Stock Number	99601
MLS Number	13961608
Category	Differentials, Rear
Last Updated	11/1/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

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2007 Eaton RSP40 Rear Differential for a Peterbilt 387

$375 USD

(USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Stock Number	25820419
MLS Number	13735580
Category	Differentials, Rear
Last Updated	11/5/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2006 Eaton RSP40 Rear Differential for a Kenworth T800

$850 USD

GTO

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T800
Stock Number	20944
MLS Number	10534029
Category	Differentials, Rear
Last Updated	12/15/2025
Location	Douglas, GA, US
Sold By	American Truck Parts, Inc.

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2009 Eaton RSP40 Rear Differential for a Peterbilt 389

$350 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	389
Part Number	N/A
Stock Number	25868608
MLS Number	13906887
Category	Differentials, Rear
Last Updated	10/18/2025
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

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2015 Eaton RSP40 Rear Differential for a Peterbilt 579

$350 USD

(USED) Eaton RSP40 Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: VERIFY

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25882514
MLS Number	13904952
Category	Differentials, Rear
Last Updated	10/17/2025
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.