Eaton RS404-3.90 Rear Differentials For Sale in Washington

Your Current Search

Industry
Truck Parts

Category
Differentials, Rear

Manufacturer
Eaton

Model
RS404-3.90

Market Type
For Sale

Country
United States

State / Region
Washington

Click the to remove the filter.

What's Save Search and Email Alert?

Narrow Your Search

Keyword Search

Search within the selected criteria

Equipment Type

Category

Make

Model

Condition

Model Year

-

Horsepower

-

Inspection Report

Warranty

Price

-

Country

State / Region

Select a state below and click Refine Results.

Seller Type

Market Type

1 - 5 of 5 listings

Eaton RS404-3.90 Rear Differential for a Peterbilt 379

2001 Eaton RS404-3.90 Rear Differential for a Peterbilt 379

Recently Updated

$1,495 USD

RS404 3.90 REBUILT+$250 core, Yoke; 1710, Side gear; 41 Spline, Input shaft; 39 spline

Condition	Remanufactured
Rear End	3.90 ratio
Fits To Make(s)	PETERBILT
Fits To Model(s)	379
Stock Number	14993
MLS Number	13810843
Category	Differentials, Rear
Last Updated	1/6/2026
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 913-___ SHOW
NUMBERCall Seller

High Mountain Horsepower

Eaton RS404-3.90 Rear Differential

Eaton RS404-3.90 Rear Differential

$1,495 USD

Eaton RS404 3.90 REBUILT+$250 Core, Capacity: 40K, Ratio: 3.90, Yoke: 1710, Side Gear: 41 Splines, Input: 39 Splines, Non-Locker

Condition	Remanufactured
Rear End	3.90 ratio
Stock Number	15366
MLS Number	13876408
Category	Differentials, Rear
Last Updated	12/25/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 913-___ SHOW
NUMBERCall Seller

High Mountain Horsepower

Eaton RS404-3.90 Rear Differential

Eaton RS404-3.90 Rear Differential

$899 USD

RS404-3.90 inspected takeout+$250 core, Yoke 1710 full round, Side gears 41 spline, Input39 spline

Condition	Used
Rear End	3.90 ratio
Stock Number	12289
MLS Number	13315709
Category	Differentials, Rear
Last Updated	12/11/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 913-___ SHOW
NUMBERCall Seller

High Mountain Horsepower

Eaton RS404-3.90 Rear Differential

Eaton RS404-3.90 Rear Differential

$899.95 USD

Eaton RS404 3.90 Inspected Takeout +$250 Core, Capacity: 40K, Ratio: 3.90, Yoke: 1710, Side Gear: 41 Splines, Input: 39 Splines, Non-Locker

Condition	Used
Rear End	3.90 ratio
Stock Number	15358
MLS Number	13871762
Category	Differentials, Rear
Last Updated	11/8/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 913-___ SHOW
NUMBERCall Seller

High Mountain Horsepower

Eaton RS404-3.90 Rear Differential for a Kenworth T800

2002 Eaton RS404-3.90 Rear Differential for a Kenworth T800

$899.95 USD

Eaton RS404 3.90 Inspected Takeout +$150 Core, Capacity: 40K, Ratio: 3.90, Yoke: 1710, Side Gear: 41 Splines, Input: 39 Splines, Non-Locker,

Condition	Used
Rear End	3.90 ratio
Fits To Make(s)	KENWORTH
Fits To Model(s)	T800
Stock Number	15325
MLS Number	13869670
Category	Differentials, Rear
Last Updated	11/8/2025
Location	Spokane Valley, WA, US
Sold By	High Mountain Horsepower

(833) 913-___ SHOW
NUMBERCall Seller

High Mountain Horsepower

What's Save Search and Email Alert?

Want to narrow or modify your search criteria?

Filter by Price

Filter by Location

Filter by Model

Filter by Keyword

Modify your search

Did you find what you were looking for? Yes No

Got a rear differential to sell? In minutes, you can create an online listing for your rear differential and advertise it to thousands of buyers.

Start selling today