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Eaton RD404 Rear Differentials For Sale

Browse Eaton RD404 Rear Differentials on MyLittleSalesman.com and compare listings with prices from $1,028 to $1,700. Sellers include Holst Truck Parts, Vander Haag's, Rydemore Heavy Duty Truck Parts, and more. Filter by condition, price, or year to quickly narrow down to the right Eaton RD404 Rear Differential.
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Showing 1 - 8 of 8 Rear Differential Listings

1 - 8 of 8 listings
1 - 8 of 8 listings
Eaton RD404 Rear Differential for a 1996 Western Star 4900

Eaton RD404 Rear Differential for a 1996 Western Star 4900

$1,195 USD
RDP40 RS404/ HAS LATE CASE WITH THRUST BLOCK 3.70 LOCKER WILL INSPECT IN OUR GEAR SHOP, 90 DAY WARRANTY, Ratio: 3.70 LOCKERS
ConditionUsed
Rear End3.70 ratio
Fits To Make(s)Western Star
Fits To Model(s)4900
Will Fit Year(s)1996
Part NumberRD404
Stock Number32225-4
MLS Number13486048
CategoryDifferentials, Rear
Last Updated4/1/2025
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
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Holst Truck Parts
Eaton RD404 Rear Differential for a International Durastar (4400)

2009 Eaton RD404 Rear Differential for a International Durastar (4400)

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$1,028 USD
(USED) Eaton RD404 Ratio: 4.88 Side Gear Splines: 41 W/ Locker: YES Cast#: ZSTPMG015687-1 Ref# RD404
ConditionUsed
Fits To Make(s)International
Fits To Model(s)DURASTAR (4400)
Part NumberRD404
Stock Number25954355
MLS Number14228197
CategoryDifferentials, Rear
Last Updated3/25/2026
Location
Sioux Falls, SD, US
Sold By
Vander Haag's Inc.
(855) 370-___  SHOW
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Vander Haag's Inc.
Eaton RD404 Rear Differential

Eaton RD404 Rear Differential

$1,700 USD
Remanufactured Eaton RD404 locking rear, rear differential assembly. 6.17 ratio. 1 Year warranty for parts or Swap out for another unit. $500 For Labor. Towing not covered.
ConditionRemanufactured
Rear End6.17 ratio
Fits To Make(s)EATON
Fits To Model(s)RD404
Stock NumberBP TRS RD404/6.17
MLS Number14050289
CategoryDifferentials, Rear
Last Updated3/14/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
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Rydemore Heavy Duty Truck Parts
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