View 4 Photos View 0 Videos 2010 Eaton RSP40 Rear Differential for a Peterbilt 387 $350 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)387Stock Number25611481 MLS Number12709683CategoryDifferentials, Rear Last Updated2/6/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos 2016 Eaton RSP40 Rear Differential for a Kenworth T680 $415 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: - ConditionUsedFits To Make(s)KenworthFits To Model(s)T680Stock Number25708510 MLS Number13193637CategoryDifferentials, Rear Last Updated12/26/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2012 Eaton RSP40 Rear Differential for a Peterbilt 365 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)365Stock Number25820189 MLS Number13709011CategoryDifferentials, Rear Last Updated7/20/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2014 Eaton RSP40 Rear Differential for a Peterbilt 386 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: CAN NOT VERIFY THE CAST NUMBER ConditionUsedFits To Make(s)PeterbiltFits To Model(s)386Stock Number25816293 MLS Number13675738CategoryDifferentials, Rear Last Updated6/29/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos 2015 Eaton RSP40 Rear Differential for a Kenworth T680 $395 USD (USED) Eaton RSP40 Ratio: 3.42 Side Gear Splines: 41 W/ Locker: NO Cast#: CAN NOT VERIFY MISSING TAG ConditionUsedFits To Make(s)KenworthFits To Model(s)T680Stock Number25792970 MLS Number13565082CategoryDifferentials, Rear Last Updated5/8/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2015 Eaton RSP40 Rear Differential for a Kenworth T680 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 515327 ConditionUsedFits To Make(s)KenworthFits To Model(s)T680Stock Number25743572 MLS Number13446082CategoryDifferentials, Rear Last Updated4/4/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos 2002 Eaton RSP40 Rear Differential for a Freightliner FLD112 $495 USD (USED) Eaton RSP40 Ratio: 3.90 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)FreightlinerFits To Model(s)FLD112Stock Number25753380 MLS Number13451486CategoryDifferentials, Rear Last Updated3/17/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2012 Eaton RSP40 Rear Differential for a Peterbilt 386 $350 USD (USED) Eaton RSP40 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 511330 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)386Stock Number25758732 MLS Number13448051CategoryDifferentials, Rear Last Updated3/14/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos 2013 Spicer J400S Rear Differential for a Peterbilt 587 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)587Stock Number25370926 MLS Number12336375CategoryDifferentials, Rear Last Updated10/27/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 5 Photos View 0 Videos 2015 Eaton RSP40 Rear Differential for a Peterbilt 579 $375 USD (USED) Eaton RSP40 Ratio: 3.08 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Stock Number25705914 MLS Number13181309CategoryDifferentials, Rear Last Updated10/17/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2015 Eaton RSP40 Rear Differential for a Peterbilt 579 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: - ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Stock Number25488587 MLS Number12277241CategoryDifferentials, Rear Last Updated8/29/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2014 Eaton RSP40 Rear Differential for a Peterbilt 386 $360 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: - ConditionUsedFits To Make(s)PeterbiltFits To Model(s)386Stock Number25423917 MLS Number12053351CategoryDifferentials, Rear Last Updated8/29/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2013 Eaton RSP40 Rear Differential for a Kenworth T660 $395 USD (USED) Eaton RSP40 Ratio: 3.42 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)KenworthFits To Model(s)T660Stock Number25355100 MLS Number12439430CategoryDifferentials, Rear Last Updated8/29/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 2008 Eaton RSP40 Rear Differential for a Kenworth T2000 $350 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)KenworthFits To Model(s)T2000Stock Number25377103 MLS Number12707417CategoryDifferentials, Rear Last Updated8/7/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos 2011 Eaton RSP40 Rear Differential for a Peterbilt 389 $350 USD (USED) Eaton RSP40 Ratio: 3.70 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)389Stock Number25657883 MLS Number12914982CategoryDifferentials, Rear Last Updated6/6/2024 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2004 Eaton RSP40 Rear Differential for a Peterbilt 379 Newly Listed $375 USD (USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: COULD NOT VERIFY ConditionUsedFits To Make(s)PeterbiltFits To Model(s)379Stock Number25957347 MLS Number14247199CategoryDifferentials, Rear Last Updated3/16/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2010 Eaton RSP40 Rear Differential for a Peterbilt 387 $395 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 511329 Ref# 511329 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)387Part Number511329Stock Number25949167 MLS Number14158615CategoryDifferentials, Rear Last Updated3/8/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2011 Eaton RSP40 Rear Differential for a Peterbilt 384 $395 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: VERIFY COULD NOT GET A CAST NO. HOUSING IS RUSTY ConditionUsedFits To Make(s)PeterbiltFits To Model(s)384Stock Number25952757 MLS Number14163961CategoryDifferentials, Rear Last Updated3/8/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2014 Eaton RSP40 Rear Differential for a Peterbilt 386 $415 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: - HOUSING IS RUSTY COULD NOT FIND CAST NO. ConditionUsedFits To Make(s)PeterbiltFits To Model(s)386Stock Number25948428 MLS Number14166531CategoryDifferentials, Rear Last Updated2/27/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2010 Eaton RSP40 Rear Differential for a Kenworth T2000 $350 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)KenworthFits To Model(s)T2000Stock Number25836038 MLS Number14091389CategoryDifferentials, Rear Last Updated1/29/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2002 Eaton RSP40 Rear Differential for a Kenworth T2000 $350 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 611329 Ref# 611329 ConditionUsedFits To Make(s)KenworthFits To Model(s)T2000Part Number611329Stock Number25824630 MLS Number14108029CategoryDifferentials, Rear Last Updated1/29/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2004 Eaton RSP40 Rear Differential for a Peterbilt 387 $350 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: Could Not verify COULD NOT GET CAST NO. CASE VERY RUSTY ConditionUsedFits To Make(s)PeterbiltFits To Model(s)387Stock Number25858800 MLS Number13799230CategoryDifferentials, Rear Last Updated12/29/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2012 Eaton RSP40 Rear Differential for a Kenworth T660 $300 USD (USED) Eaton RSP40 Ratio: 3.55 Side Gear Splines: 41 W/ Locker: NO Cast#: 511329 ConditionUsedFits To Make(s)KenworthFits To Model(s)T660Stock Number25841346 MLS Number13997480CategoryDifferentials, Rear Last Updated12/4/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2016 Eaton RSP40 Rear Differential for a Peterbilt 579 $350 USD (USED) Eaton RSP40 Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: 511323 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Stock Number25851913 MLS Number13789546CategoryDifferentials, Rear Last Updated11/27/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2006 Eaton RSP40 Rear Differential for a Kenworth T600 $415 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: 131812 ConditionUsedFits To Make(s)KenworthFits To Model(s)T600Stock Number25875020 MLS Number13915509CategoryDifferentials, Rear Last Updated11/6/2025 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info