Eaton RSP40 Rear Differentials For Sale

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.

(833) 359-___ SHOW
NUMBERCall Seller

Eaton RSP40 Rear Differential

$1,495 USD

REBUILT EATON RSP40 REAR DIFFERENTIAL RATIO: 3.55

Condition	Remanufactured
Rear End	3.55 ratio
Stock Number	99852
MLS Number	14225365
Category	Differentials, Rear
Last Updated	3/5/2026
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts 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.

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential assembly. 3.42 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	3.42 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/3.42
MLS Number	14050652
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential assembly. 6.17 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	6.17 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/6.17
MLS Number	14050553
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential assembly. 3.90 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Quantity	2
Condition	Remanufactured
Rear End	3.90 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/3.90
MLS Number	14050433
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential assembly. 3.08 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	3.08 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/3.08
MLS Number	14050396
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential asembly. 5.57 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Condition	Remanufactured
Rear End	5.57 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/5.57
MLS Number	14050367
Category	Differentials, Rear
Last Updated	3/2/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RSP40 Rear Differential

$1,200 USD

Remanufactured Eaton RSP40 rear, rear differential assembly. 3.55 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Quantity	8
Condition	Remanufactured
Rear End	3.55 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	BP TRS RSP40/3.55
MLS Number	14050366
Category	Differentials, Rear
Last Updated	3/3/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

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.