Eaton Rear Differentials For Sale in Washington

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2007 Eaton RDP40-3.90 Rear Differential for a Peterbilt 379

Newly Listed

$1,495 USD

RDP40 3.90 LOCKER Will be inspected upon dismantle of the truck. +1100 Core.

Condition	Used
Fits To Make(s)	PETERBILT
Fits To Model(s)	379
Stock Number	14085
MLS Number	13664509
Category	Differentials, Rear
Last Updated	6/25/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

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Eaton RSP40 Rear Differential

$500 USD

3.25 Ratio 41 Spline

Condition	Used
Fits To Make(s)	Eaton
Fits To Model(s)	RSP40
Stock Number	R12039820
MLS Number	13637067
Category	Differentials, Rear
Last Updated	6/11/2025
Location	Spokane Valley, WA, US
Sold By	Spalding Truck Parts

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Eaton RSP40-3.90 Rear Differential

$150 USD

RSP40 3.90 CORE. Core return from truck 1395, Yoke SPL170, Side gear 41 Spline, Input 39 Spline

Condition	Used
Rear End	3.90 ratio
Stock Number	12526
MLS Number	13371860
Category	Differentials, Rear
Last Updated	5/13/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

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2016 Eaton RSP40-3.55 Rear Differential for a Peterbilt 389

$495 USD

RSP40 3.55 Inspected takeout from low mileage (43,000 MI) non wrecked truck Yoke 1710 Full Round, Side gear 41 Spline, Input 39 Spline

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	389
Stock Number	12521
MLS Number	13371855
Category	Differentials, Rear
Last Updated	4/29/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

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Eaton 23080-D Rear Differential

$825 USD

23080D 3.70 Locking differential. Inspected takeout, Yoke 1760 Open, Side gears 36 Spline, Input 44 Spline

Condition	Used
Rear End	3.70 ratio
Stock Number	12436
MLS Number	13338930
Category	Differentials, Rear
Last Updated	4/29/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

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1990 Eaton Rear Differential for a Peterbilt 379

$400 USD

3.70 RS402 CORE return. Pinion Bearing Spinning Yoke N/A, side gear 41 spline, Input 39 Spline

Condition	Used
Rear End	3.70 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	379
Stock Number	12275
MLS Number	13313949
Category	Differentials, Rear
Last Updated	4/29/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

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2023 Eaton Rear Differential for a Peterbilt 579

$3,250 USD

3.07 Ratio, S23-190D, 3.07 Ratio. Locking differential, from ZERO mile non-wrecked 2024 Peterbilt 579.

Condition	Used
Rear End	3.07 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	579
Stock Number	10768
MLS Number	13067553
Category	Differentials, Rear
Last Updated	4/29/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower