Used Eaton RSP40 Rear Differentials For Sale

2005 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 Ref# 511329

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Part Number	511329
Stock Number	25956772
MLS Number	14306296
Category	Differentials, Rear
Last Updated	4/12/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

2001 Eaton RSP40 Rear Differential for a Mack CX

$495 USD

(USED) Eaton RSP40 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: NO Cast#: 129351 Ref# NO TAG

Condition	Used
Fits To Make(s)	Mack
Fits To Model(s)	CX
Part Number	NO TAG
Stock Number	25952614
MLS Number	14301532
Category	Differentials, Rear
Last Updated	4/10/2026
Location	Des Moines, IA, US
Sold By	Vander Haag's Inc.

2009 Eaton RSP40 Rear Differential for a Peterbilt 367

$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)	367
Stock Number	25960784
MLS Number	14242058
Category	Differentials, Rear
Last Updated	4/3/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

(833) 396-___ SHOW
NUMBERCall Seller

2013 Eaton RSP40 Rear Differential for a Kenworth T600

$650 USD

Used Eaton Rear Differential RSP40, Ratio 3.55

Condition	Used
Fits To Make(s)	KENWORTH
Fits To Model(s)	T600
Stock Number	S7163RR
MLS Number	11100390
Category	Differentials, Rear
Last Updated	4/1/2026
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

2004 Eaton RSP40 Rear Differential for a Kenworth W900L

$395 USD

(USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 130830

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	W900L
Stock Number	25968226
MLS Number	14270036
Category	Differentials, Rear
Last Updated	3/28/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2010 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	25961097
MLS Number	14268021
Category	Differentials, Rear
Last Updated	3/26/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

2013 Eaton RSP40 Rear Differential for a Kenworth T660

$395 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)	T660
Stock Number	25967565
MLS Number	14267925
Category	Differentials, Rear
Last Updated	3/28/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2009 Eaton RSP40 Rear Differential for a Peterbilt 386

$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)	386
Stock Number	25911672
MLS Number	14254172
Category	Differentials, Rear
Last Updated	3/19/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

2008 Eaton RSP40 Rear Differential for a Peterbilt 386

$395 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Part Number	511329
Stock Number	25931245
MLS Number	14254157
Category	Differentials, Rear
Last Updated	3/19/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

2004 Eaton RSP40 Rear Differential for a Peterbilt 379

$375 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	379
Stock Number	25957347
MLS Number	14247199
Category	Differentials, Rear
Last Updated	3/16/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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	3/15/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2009 Eaton RSP40 Rear Differential for a Peterbilt 389

$395 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	3/19/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

2014 Eaton RSP40 Rear Differential for a Kenworth T660

$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)	T660
Stock Number	25960501
MLS Number	14239541
Category	Differentials, Rear
Last Updated	3/12/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

(866) 314-___ SHOW
NUMBERCall Seller

Eaton RSP40 Rear Differential

$950 USD

EATON RSP40 3.36 - LOCKER, OUTSIDE

Condition	Used
Stock Number	REAR-1133
MLS Number	12179546
Category	Differentials, Rear
Last Updated	3/12/2026
Location	LAKEVILLE, MN, US
Sold By	Manders Diesel

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#: 131812 Ref# 1419920

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Part Number	1419920
Stock Number	25935862
MLS Number	14146297
Category	Differentials, Rear
Last Updated	3/8/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

2010 Eaton RSP40 Rear Differential for a Peterbilt 387

$395 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	387
Part Number	511329
Stock Number	25949167
MLS Number	14158615
Category	Differentials, Rear
Last Updated	3/8/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

2008 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	25949694
MLS Number	14166530
Category	Differentials, Rear
Last Updated	3/8/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

(877) 254-___ SHOW
NUMBERCall Seller

2010 Eaton RSP40 Rear Differential for a Kenworth T660

$750 USD

DSP 40 REAR REAR 3.55 RATIO

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T660
Stock Number	28348
MLS Number	14148903
Category	Differentials, Rear
Last Updated	3/5/2026
Location	Douglas, GA, US
Sold By	American Truck Parts, Inc.

2000 Eaton RSP40 Rear Differential for a Peterbilt 379

$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)	379
Stock Number	25955672
MLS Number	14221947
Category	Differentials, Rear
Last Updated	3/8/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2014 Eaton RSP40 Rear Differential for a Peterbilt 386

$415 USD

(USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: - HOUSING IS RUSTY COULD NOT FIND CAST NO.

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Stock Number	25948428
MLS Number	14166531
Category	Differentials, Rear
Last Updated	2/27/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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	25902940
MLS Number	14004154
Category	Differentials, Rear
Last Updated	2/26/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2016 Eaton RSP40 Rear Differential for a Kenworth T680

$415 USD

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

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T680
Stock Number	25905198
MLS Number	14014760
Category	Differentials, Rear
Last Updated	2/26/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2012 Eaton RSP40 Rear Differential for a Peterbilt 386

$415 USD

(USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 Ref# 511327

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	386
Part Number	511327
Stock Number	25873025
MLS Number	14014860
Category	Differentials, Rear
Last Updated	2/21/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.