Eaton RS404 Axles &amp; Differentials For Sale in United States

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Eaton RS404 Rear Differential

$1,250 USD

REBUILT 12 MONTH WARRANTY

Condition	Used
Rear End	3.70 ratio
Stock Number	20924
MLS Number	10534023
Category	Differentials, Rear
Last Updated	12/15/2025
Location	Douglas, GA, US
Sold By	American Truck Parts, Inc.

(877) 254-___ SHOW
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Eaton RS404 Rear Differential

$1,250 USD

1 YEAR WARRANTY

Condition	Used
Rear End	3.70 ratio
Stock Number	19779
MLS Number	10533829
Category	Differentials, Rear
Last Updated	12/15/2025
Location	Douglas, GA, US
Sold By	American Truck Parts, Inc.

Eaton RS404 Rear Differential, RATIO 3.70

$650 USD

USED EATON RS404 REAR DIFFERENTIAL ASSEMBLY, RATIO 3.70, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404, RATIO 3.70
Stock Number	S4100
MLS Number	10149799
Category	Differentials, Rear
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Rear Differential Ratio 3.25

$650 USD

USED EATON RS404 REAR DIFFERENTIAL ASSEMBLY, RATIO 3.25, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404, Ratio 3.25
Stock Number	S4098
MLS Number	10149792
Category	Differentials, Rear
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Rear Differential Ratio 2.85

$650 USD

USED EATON RS404 REAR DIFFERENTIAL ASSEMBLY, RATIO 2.85, 30 DAY WARRANTY, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGINE.

Condition	Used
Part Number	RS404
Stock Number	S091
MLS Number	10134416
Category	Differentials, Rear
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential, RATIO 2.64

$950 USD

USED EATON RS404 REAR DIFFERENTIAL ASSEMBLY, RATIO 2.64.

Condition	Used
Part Number	RS404 RATIO 2.64
Stock Number	S4062
MLS Number	10093197
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Rear Differential, Ratio 3.90

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 3.90.

Condition	Used
Part Number	RS404
Stock Number	S4048
MLS Number	10107808
Category	Differentials, Rear
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential, 4.88 RATIO

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 4.88.,

Condition	Used
Part Number	RS404
Stock Number	S4080
MLS Number	10107142
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential, RATIO 3.55

$650 USD

USED/ TAKE OUT EATON RS404 REAR DIFFERENTIAL, RATIO 3.55, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404, RATIO 3.55
Stock Number	S4077
MLS Number	10107110
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential, REAR, RATIO 3.36

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 3.36, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404, RATIO 3.36
Stock Number	S4076
MLS Number	10106119
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential, Rear Ratio 3.55

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 3.55, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404, RATIO 3.55
Stock Number	S4075
MLS Number	10106118
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 2.85. FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404
Stock Number	S4074
MLS Number	10101640
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Differential REAR DIFFERENTIAL, RATIO 3.70

$650 USD

USED EATON RS404 REAR DIFFERENTIAL ASSEMBLY, RATIO 3.70.

Condition	Used
Part Number	RS404
Stock Number	S4073
MLS Number	10101638
Category	Differentials, Unspecified
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Rear Differential

$650 USD

USED EATON RS404 REAR DIFFERENTIAL RATIO 3.55, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN.

Condition	Used
Part Number	RS404 RATIO 3.55
Stock Number	S4058
MLS Number	10092934
Category	Differentials, Rear
Last Updated	4/7/2023
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

Eaton RS404 Rear Differential, 3.90 Ratio

$650 USD

USED EATON RS404 REAR DIFFERENTIAL, RATIO 3.90, FOR MORE INFORMATION PLEASE CALL 844-EZ-ENGIN

Condition	Used
Part Number	RS404
Stock Number	S4057
MLS Number	10092334
Category	Differentials, Rear
Last Updated	2/15/2020
Location	Palmyra, PA, US
Sold By	Boots and Hank's Truck Parts, Inc.

2014 Eaton RS404 Rear Axle Housing for a International Prostar

Newly Listed

$950 USD

(USED) Eaton RS404 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: IROS Track Width : 71

Condition	Used
Fits To Make(s)	International
Fits To Model(s)	Prostar
Stock Number	26031058
MLS Number	14507641
Category	Axle Housings, Rear
Last Updated	7/26/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2000 Eaton RS404 Rear Differential for a Kenworth T800

Newly Listed

$595 USD

(USED) Eaton RS404 Ratio: 4.11 Side Gear Splines: 41 W/ Locker: NO Cast#: 127603

Condition	Used
Fits To Make(s)	Kenworth
Fits To Model(s)	T800
Stock Number	26020028
MLS Number	14506232
Category	Differentials, Rear
Last Updated	7/25/2026
Location	Winimac, IN, US
Sold By	Vander Haag's Inc.

1998 Eaton RS404 Rear Axle Housing for a Peterbilt 379

Recently Updated

$950 USD

(USED) Eaton RS404 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: PETE LOW AIR LEAF Track Width : 73

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	379
Stock Number	26027391
MLS Number	14466394
Category	Axle Housings, Rear
Last Updated	7/25/2026
Location	Sioux Falls, SD, US
Sold By	Vander Haag's Inc.

2014 Eaton RS404 Rear Differential for a International Prostar

Newly Listed

$455 USD

(USED) Eaton RS404 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: CANNOT VERIFY

Condition	Used
Fits To Make(s)	International
Fits To Model(s)	Prostar
Stock Number	26031055
MLS Number	14506224
Category	Differentials, Rear
Last Updated	7/25/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

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1997 Eaton RS404 Rear Axle Housing for a Freightliner FLD112

Newly Listed

Contact for price

Eaton RS404 Axle Housing, 10 Hole Pilot, Air Drum Brakes, P/N 306298. Removed From Hendrickson HN402 Suspension.

Condition	Used
Suspension	Hendrickson
Fits To Make(s)	FREIGHTLINER
Fits To Model(s)	FLD112
Stock Number	120-30E
MLS Number	14505536
Category	Axle Housings, Rear
Last Updated	7/24/2026
Location	Fresno, CA, US
Sold By	Garabedian Equipment

1998 Eaton RS404 Rear Axle Housing for a Volvo WG

Recently Updated

$950 USD

(USED) Eaton RS404 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: VOLVO SPRING Track Width : 71

Condition	Used
Fits To Make(s)	Volvo
Fits To Model(s)	WG
Stock Number	26028734
MLS Number	14473734
Category	Axle Housings, Rear
Last Updated	7/24/2026
Location	Council Bluffs, IA, US
Sold By	Vander Haag's Inc.

2001 Eaton RS404 Rear Differential for a Peterbilt 379

Newly Listed

$585 USD

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

Condition	Used
Fits To Make(s)	Peterbilt
Fits To Model(s)	379
Stock Number	26037162
MLS Number	14503652
Category	Differentials, Rear
Last Updated	7/24/2026
Location	Spencer, IA, US
Sold By	Vander Haag's Inc.

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Eaton RS404 Rear Differential

Recently Updated

$1,200 USD

Remanufactured Eaton RS404 rear, rear differetnial assembly. 4.33 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered

Quantity	2
Condition	Remanufactured
Rear End	4.33 ratio
Stock Number	BP TRS RS404/4.33
MLS Number	14050564
Category	Differentials, Rear
Last Updated	7/23/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts

(888) 519-___ SHOW
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Eaton RS404 Rear Differential

Recently Updated

$1,200 USD

Remanufactured Eaton RS404 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	4
Condition	Remanufactured
Rear End	3.55 ratio
Stock Number	BP TRS RS404/3.55
MLS Number	14050327
Category	Differentials, Rear
Last Updated	7/23/2026
Location	Fitchburg, MA, US
Sold By	Rydemore Heavy Duty Truck Parts