Used Eaton RSP40 Rear Differentials For Sale by Dealerships

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Truck Parts

Category
Differentials, Rear

Manufacturer
Eaton

Model
RSP40

Condition
Used

Seller Type
Dealerships

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2013 Eaton RSP40 Rear Differential for a Peterbilt 386

2016 Eaton RSP40 Rear Differential for a Kenworth T680

Newly Listed

$350 USD

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

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Stock Number	25921244
MLS Number	14123363
Category	Differentials, Rear
Last Updated	2/4/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
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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 YOKE WILL NEED SWAPPED OR TO HAVE BROKEN BOLTS EXTRACTED

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T600
Stock Number	25914535
MLS Number	14119585
Category	Differentials, Rear
Last Updated	1/31/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
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2011 Eaton RSP40 Rear Differential for a Kenworth T660

$495 USD

(USED) Eaton RSP40 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T660
Stock Number	25924696
MLS Number	14117716
Category	Differentials, Rear
Last Updated	1/30/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

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2010 Eaton RSP40 Rear Differential for a Kenworth T2000

$350 USD

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

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T2000
Stock Number	25836038
MLS Number	14091389
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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2011 Eaton RSP40 Rear Differential for a Peterbilt 384

$574 USD

(USED) Eaton RSP40 Ratio: 4.11 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	384
Stock Number	25918209
MLS Number	14079122
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Council Bluffs, IA, 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	25924823
MLS Number	14104173
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2001 Eaton RSP40 Rear Differential for a Peterbilt 385

$495 USD

(USED) Eaton RSP40 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: NO Cast#: 129543

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	385
Stock Number	25929955
MLS Number	14115823
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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Eaton RSP40 Rear Differential for a 2012 Kenworth T-660

$700 USD

GOOD USED, Core Charge: 0, Ratio: 3.70

Condition	Used
Rear End	3.70 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T-660
Will Fit Year(s)	2012
Stock Number	2A2E57113
MLS Number	14113711
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Ste-Julie, QC, Canada
Sold By	Camions Lussier-Lussicam inc.

(844) 503-___ SHOW
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Eaton RSP40 Rear Differential for a 2006 Kenworth T-800

$700 USD

GOOD USED, Core Charge: 0, Ratio: 3.70

Condition	Used
Rear End	3.70 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T-800
Will Fit Year(s)	2006
Stock Number	2A2E57133
MLS Number	14108057
Category	Differentials, Rear
Last Updated	1/25/2026
Location	Ste-Julie, QC, Canada
Sold By	Camions Lussier-Lussicam inc.

(844) 503-___ SHOW
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2002 Eaton RSP40 Rear Differential for a Kenworth T2000

$350 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 611329 Ref# 611329

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T2000
Part Number	611329
Stock Number	25824630
MLS Number	14108029
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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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#: 131812 Ref# 511328

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Part Number	511328
Stock Number	25924137
MLS Number	14107965
Category	Differentials, Rear
Last Updated	1/24/2026
Location	Sioux Falls, SD, 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#: 131812

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	365
Stock Number	25900821
MLS Number	14104261
Category	Differentials, Rear
Last Updated	1/22/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

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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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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.

(833) 359-___ SHOW
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2016 Eaton RSP40 Rear Differential for a Kenworth T680

$500 USD

RSP40 - 3.42 Ratio - Pullout - P/N 515354

Condition	Used
Rear End	3.42 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T680
Stock Number	UPS-277297-13
MLS Number	13904809
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

(855) 794-___ SHOW
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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.

(877) 254-___ SHOW
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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.

(855) 370-___ SHOW
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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.

(855) 370-___ SHOW
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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.

(855) 370-___ SHOW
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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.