Eaton RSP40 Rear Differentials For Sale

3 0

2008 Eaton RSP40 Rear Differential for a Peterbilt 388

$500 USD

RDP40 3.55 CORE

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	388
Stock Number	15070
MLS Number	13815359
Category	Differentials, Rear
Last Updated	12/16/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

7 0

Eaton RSP40 Rear Differential

$1,225 USD

RSP40 3.36 REBUILT +$450 Core, Yoke: N/A, Side Gear: 41 Splines, Input: 39 Splines, Non-Locker

Condition	Remanufactured
Rear End	3.36 ratio
Stock Number	15069
MLS Number	13815358
Category	Differentials, Rear
Last Updated	12/17/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

6 0

2016 Eaton RSP40 Rear Differential for a Peterbilt 579

$899 USD

RSP40 3.55 Inspected Takeout +$250 Core, Capacity: 40K, Ratio: 3.55, Yoke: 1710, Side Gear: 41 Spline, Input: 39 Spline

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	579
Stock Number	14929
MLS Number	13806984
Category	Differentials, Rear
Last Updated	12/16/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

2 0

Eaton RSP40 Rear Differential

$899 USD

RSP40 3.36 Takeout +$250 Core, SN: HN02538631, OEM# C05-140601H4A00336

Condition	Used
Rear End	3.36 ratio
Stock Number	11393
MLS Number	13175901
Category	Differentials, Rear
Last Updated	12/16/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

3 0

2012 Eaton RSP40 Rear Differential for a Kenworth T660

$899 USD

RSP40 3.42 Takeout +$250 core, SN: HN03631464, OEM# C05-541112221101034

Condition	Used
Rear End	3.42 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T660
Stock Number	11258
MLS Number	13160120
Category	Differentials, Rear
Last Updated	12/16/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

7 0

Eaton RSP40 Rear Differential

$500 USD

RSP40 - 3.55 Ratio - Pullout - Grade A - Unit In Good Condition. P/N 511329

Condition	Used
Rear End	3.55 ratio
Stock Number	4541787
MLS Number	13898301
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

7 0

Eaton RSP40 Rear Differential

$300 USD

RSP40 - 3.42 Ratio - Core - Grade C - Rebuildable - Broken Pinion, Damgaged Bearings. P/N 515354, 681537, CORE UNIT SOLD AS IS

Condition	Used
Rear End	3.42 ratio
Stock Number	4541341
MLS Number	13897209
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

7 0

2016 Eaton RSP40 Rear Differential for a Kenworth T680

$500 USD

RSP40 - 3.42 Ratio - Pullout - Grade A - Unit In Good Condition. P/N 515354 (681537)

Condition	Used
Rear End	3.42 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T680
Stock Number	UPS-277242-3
MLS Number	13897001
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

6 0

Eaton RSP40 Rear Differential

$200 USD

RSP40 - 3.55 Ratio - Core - Grade D - Tail Bearings Worn, Case No Good. P/N 676034 (RSP40355CF) CORE UNIT SOLD AS-IS

Condition	Used
Rear End	3.55 ratio
Stock Number	4541045
MLS Number	13896579
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

6 0

Eaton RSP40 Rear Differential

$500 USD

RSP40 - 5.29 Ratio - Pullout - Grade A - Unit In Good Condition.

Condition	Used
Rear End	5.29 ratio
Stock Number	4540415
MLS Number	13895665
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

4 0

Eaton RSP40 Rear Differential

$300 USD

RSP40 - 3.25 Ratio - Core - Grade C - Rebuildable - Pinion Threads Bad. CORE UNIT SOLD AS-IS

Condition	Used
Rear End	3.25 ratio
Stock Number	4538060
MLS Number	13890531
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

5 0

Eaton RSP40 Rear Differential

$200 USD

RSP40 - 3.42 Ratio - Core - Grade D - Gear Set Damaged Due To Lack Of Oil Or Wrong Oil. P/N RSP40342EX, CORE UNIT SOLD AS-IS

Condition	Used
Rear End	3.42 ratio
Stock Number	4536441
MLS Number	13888900
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

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4 0

2005 Eaton RSP40 Rear Differential for a Kenworth T600

$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)	T600
Stock Number	25808327
MLS Number	13631850
Category	Differentials, Rear
Last Updated	12/10/2025
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
NUMBERCall Seller

2 0

2016 Eaton RSP40 Rear Differential for a Peterbilt 579

$415 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	579
Stock Number	25670062
MLS Number	13013476
Category	Differentials, Rear
Last Updated	12/5/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

(855) 370-___ SHOW
NUMBERCall Seller

2 0

2014 Eaton RSP40 Rear Differential for a Peterbilt 579

$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)	579
Stock Number	25801519
MLS Number	13605906
Category	Differentials, Rear
Last Updated	12/5/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

(866) 314-___ SHOW
NUMBERCall Seller

1 0

Eaton RSP40 Rear Differential

$550 USD

3.90,

Condition	Used
Stock Number	REAR-2237
MLS Number	13998064
Category	Differentials, Rear
Last Updated	11/22/2025
Location	LAKEVILLE, MN, US
Sold By	Manders Diesel

(888) 519-___ SHOW
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4 0

Eaton RSP40 Rear Differential

$600 USD

Good used Eaton RSP40 Rear, Rear Differential Assembly. 3.25 Ratio. 90 day guarantee for swap or refund

Quantity	2
Condition	Used
Rear End	3.25 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RSP40
Stock Number	Ryd RSP40/3.25/41
MLS Number	10806818
Category	Differentials, Rear
Last Updated	11/19/2025
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

(833) 541-___ SHOW
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1 0

Eaton RSP40 Rear Differential for a 2003 Peterbilt 379

$550 USD

RSP40 3.55 WILL INSPECT IN OUR GEAR SHOP, 90 DAY WARRANTY, Axle Spline Count: 41, Ratio: 3.55

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	Peterbilt
Fits To Model(s)	379
Will Fit Year(s)	2003
Part Number	RSP40
Stock Number	31825-4
MLS Number	13460979
Category	Differentials, Rear
Last Updated	11/20/2025
Location	Ucon, ID, US
Sold By	Holst Truck Parts

5 0

2004 Eaton RSP40 Rear Differential for a Peterbilt 379

$899 USD

Eaton RSP40 3.36 Inspected Takeout +$250 Core, Capacity: 40K, Ratio: 3.36, Yoke: 1710, Side Gear: 41 Splines, Input: 39 Splines, Non-Locker

Condition	Used
Rear End	3.36 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	379
Stock Number	15369
MLS Number	13876411
Category	Differentials, Rear
Last Updated	11/14/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 541-___ SHOW
NUMBERCall Seller

1 0

Eaton RSP40 Rear Differential

$495 USD

INSPECTED TAKE OUT RSP40 5.57. 90 DAY PARTS ONLY WARRANTY. EXTENDED WARRANTY AVAILABLE., Axle Spline Count: 41, Serial#: 131812, Core Charge: EXCHANGE, Ratio: 557

Condition	Used
Part Number	62163
Stock Number	62163
MLS Number	13983377
Category	Differentials, Rear
Last Updated	11/14/2025
Location	Ucon, ID, US
Sold By	Holst Truck Parts

(833) 541-___ SHOW
NUMBERCall Seller

1 0

Eaton RSP40 Rear Differential

$1,995 USD

REBUILT RSP40 3.55 . 112 MONTH PARTS AND LABOR WARRANTY. EXTENDED WARRANTY AVAILABLE., Axle Spline Count: 41, Serial#: 62162, Core Charge: EXCHANGE, Ratio: 3.55

Condition	Remanufactured
Part Number	62162
Stock Number	62162
MLS Number	13983367
Category	Differentials, Rear
Last Updated	11/14/2025
Location	Ucon, ID, US
Sold By	Holst Truck Parts