Used Eaton RS404 Rear Differentials For Sale in United States

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Eaton RS404 Rear Differential for a 2000 Kenworth T800

Recently Updated

$695 USD

RS404 3.90 RATIO USED TAKEOUT, WILL INSPECT IN OUR GEARSHOP. 90 DAY WARRANTY., Axle Spline Count: 41, Ratio: 3.90, Casting#: 127608

Condition	Used
Rear End	3.90 ratio
Fits To Make(s)	Kenworth
Fits To Model(s)	T800
Will Fit Year(s)	2000
Stock Number	10826-2
MLS Number	14087670
Category	Differentials, Rear
Last Updated	2/4/2026
Location	Ucon, ID, US
Sold By	Holst Truck Parts

Eaton RS404 Rear Differential

Recently Updated

$200 USD

RS404 - 3.70 Ratio - Core - Grade D - Burnt Unit - Broken Gearset, Main Case Worn. CORE UNIT SOLD AS-IS.

Condition	Used
Rear End	3.70 ratio
Stock Number	27180
MLS Number	14080072
Category	Differentials, Rear
Last Updated	1/31/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

Recently Updated

$500 USD

Good used Eaton DS404 Rear, Rear Differential Assembly. 3.70 Ratio. 90 day guarantee for swap or refund

Quantity	2
Condition	Used
Rear End	3.70 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RS404
Stock Number	Ryd RS404/3.70/41
MLS Number	10295744
Category	Differentials, Rear
Last Updated	1/31/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

2000 Eaton RS404 Rear Differential for a Chevrolet C7500

Recently Updated

$375 USD

(USED) Eaton RS404 Ratio: VERIFY Side Gear Splines: 41 W/ Locker: NO Cast#: 127603

Condition	Used
Fits To Make(s)	Chevrolet
Fits To Model(s)	C7500
Stock Number	25734668
MLS Number	13335178
Category	Differentials, Rear
Last Updated	1/31/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2000 Eaton RS404 Rear Differential for a Western Star 4900EX

Recently Updated

$425 USD

(USED) Eaton RS404 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: NO Cast#: -

Condition	Used
Fits To Make(s)	Western Star Trucks
Fits To Model(s)	4900EX
Stock Number	25657582
MLS Number	12960049
Category	Differentials, Rear
Last Updated	1/29/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

2000 Eaton RS404 Rear Differential for a Volvo VNL

Price Drop $325 USD

(USED) Eaton RS404 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 127603

Condition	Used
Fits To Make(s)	Volvo
Fits To Model(s)	VNL
Stock Number	25691721
MLS Number	13349502
Category	Differentials, Rear
Last Updated	1/22/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

1999 Eaton RS404 Rear Differential for a Kenworth T600

$325 USD

(USED) Eaton RS404 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 127603 Ref# N/A

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T600
Part Number	N/A
Stock Number	25773063
MLS Number	13511335
Category	Differentials, Rear
Last Updated	1/21/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

2007 Eaton RS404 Rear Differential for a Freightliner C120 Century

$585 USD

(USED) Eaton RS404 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	Freightliner
Fits To Model(s)	C120 CENTURY
Stock Number	25739374
MLS Number	13325155
Category	Differentials, Rear
Last Updated	1/11/2026
Location	Kansas City, MO, US
Sold By	Vander Haag's Inc.

1999 Eaton RS404 Rear Differential for a Volvo VNL

$325 USD

(USED) Eaton RS404 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 127603

Condition	Used
Fits To Make(s)	Volvo
Fits To Model(s)	VNL
Stock Number	25642938
MLS Number	12863379
Category	Differentials, Rear
Last Updated	1/11/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

Eaton RS404 Rear Differential

$500 USD

Good used Eaton DS404 Rear, Rear Differential Assembly. 3.25 Ratio. 90 day guarantee for swap or refund

Condition	Used
Rear End	3.25 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RS404
Stock Number	Ryd RS404/3.25/41
MLS Number	11999592
Category	Differentials, Rear
Last Updated	1/1/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RS404 Rear Differential

$500 USD

Good used Eaton DS404 Rear, Rear Differential Assembly. 3.55 Ratio. 90 day guarantee for swap or refund

Quantity	2
Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RS404
Stock Number	Ryd RS404/3.55/41
MLS Number	10204592
Category	Differentials, Rear
Last Updated	1/1/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RS404 Rear Differential

$500 USD

Good used Eaton RS404 Rear, Rear Differential Assembly. 3.36 Ratio. 90 day guarantee for swap or refund

Quantity	2
Condition	Used
Rear End	3.36 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RS404
Stock Number	Ryd RS404/3.36/41
MLS Number	11402853
Category	Differentials, Rear
Last Updated	1/1/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

Eaton RS404 Rear Differential

$500 USD

Good used Eaton DS404 Rear, Rear Differential Assembly. 2.93 Ratio. 90 day guarantee for swap or refund

Quantity	2
Condition	Used
Rear End	2.93 ratio
Fits To Make(s)	EATON
Fits To Model(s)	RS404
Stock Number	Ryd RS404/2.93/41
MLS Number	10714392
Category	Differentials, Rear
Last Updated	1/1/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

2007 Eaton RS404 Rear Differential for a International 8600

$585 USD

(USED) Eaton RS404 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812

Condition	Used
Fits To Make(s)	International
Fits To Model(s)	8600
Stock Number	25668602
MLS Number	12960244
Category	Differentials, Rear
Last Updated	12/29/2025
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

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2011 Eaton RS404 Rear Differential for a Freightliner CASCADIA 125

$795 USD

USED EATON RS404 REAR REAR DIFFERENTIAL/3.55 RATIO

Condition	Used
Rear End	3.55 ratio
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	CASCADIA 125
Stock Number	86384
MLS Number	12832813
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Crandall, TX, US
Sold By	Tim Jordan's Truck Parts Inc.

Eaton RS404 Rear Differential

$850 USD

RS404-264 - Refurbished

Condition	Used
Rear End	2.64 ratio
Stock Number	RS404-264-REF
MLS Number	14028782
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-285 - Refurbished

Condition	Used
Rear End	2.85 ratio
Stock Number	RS404-285-REF
MLS Number	14028783
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-293 - Refurbished

Condition	Used
Rear End	2.93 ratio
Stock Number	RS404-293-REF
MLS Number	14028784
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-308 - Refurbished

Condition	Used
Rear End	3.08 ratio
Stock Number	RS404-308-REF
MLS Number	14028785
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-325 - Refurbished

Condition	Used
Rear End	3.25 ratio
Stock Number	RS404-325-REF
MLS Number	14028786
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-336 - Refurbished

Condition	Used
Rear End	3.36 ratio
Stock Number	RS404-336-REF
MLS Number	14028787
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-342 - Refurbished

Condition	Used
Rear End	3.42 ratio
Stock Number	RS404-342-REF
MLS Number	14028788
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-355 - Refurbished

Condition	Used
Rear End	3.55 ratio
Stock Number	RS404-355-REF
MLS Number	14028789
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment

Eaton RS404 Rear Differential

$850 USD

RS404-370 - Refurbished

Condition	Used
Rear End	3.70 ratio
Stock Number	RS404-370-REF
MLS Number	14028790
Category	Differentials, Rear
Last Updated	12/27/2025
Location	Fresno, CA, US
Sold By	Garabedian Equipment