View 1 Photo View 0 Videos Meritor-Rockwell RSL23161 Rear Differential for a 2020 Peterbilt 579 Recently Updated $1,495 USD RRL23-161 2.80 LOCKER, 166K MILES, INSPECTED IN OUR GEAR SHOP, 90 DAY WARANTY, Ratio: 2.8 ConditionUsedRear End2.80 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2020Stock Number60624-3 MLS Number12924246CategoryDifferentials, Rear Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Meritor-Rockwell 20-14X Rear Differential for a 2019 Peterbilt 579 Recently Updated $695 USD 20-14X 3.08 GOOD INSPECTED TAKEOUT/ 90 DAY WARRANTY EXCHANGE, Axle Spline Count: 41, Serial#: NA, Core Charge: 300, Ratio: 3.08 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2019Part Number20-14XStock Number40824-3 MLS Number12779283CategoryDifferentials, Rear Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Dana-Spicer D40-155 Rear Differential for a 2016 Peterbilt 579 Recently Updated $1,695 USD D40-155R 2.79 GOOD INSPECTED UNIT. 90 DAY WARRANTY/EXCHANGE, Axle Spline Count: 41, Core Charge: 400, Ratio: 2.79, Casting#: NA ConditionUsedRear End2.79 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2016Part NumberD40-155RStock Number22424-3 MLS Number12707320CategoryDifferentials, Rear Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Meritor-Rockwell 20-14X Rear Differential for a 2020 Peterbilt 579 Recently Updated $995 USD 20-14X RR 2.85 INSPECTED IN OUR GEAR SHOP 90 DAY WARRANTY, Ratio: 2.85 ConditionUsedRear End2.85 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2020Stock Number90722-9 MLS Number11607573CategoryDifferentials, Rear Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Meritor-Rockwell 20-14X Rear Differential for a 2016 Peterbilt 579 Recently Updated $695 USD 20-14X 2.79 INSPECTED IN OUR GEAR SHOP 90 DAY WARRANTY, Ratio: 2.79 ConditionUsedRear End2.79 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2016Stock Number120920-8 MLS Number10616358CategoryDifferentials, Rear Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Meritor-Rockwell 20-14X Rear Differential for a 2018 Peterbilt 579 Recently Updated $895 USD 20-14X 3.42 LOW MILE INSPECTED TAKEOUT 90 DAY WARRANTY, Ratio: 3.42 ConditionUsedRear End3.42 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2018Stock Number122219-7 MLS Number10037971CategoryDifferentials, Rear Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Meritor-Rockwell MR2014X Rear Differential for a 2023 Peterbilt 579 Recently Updated Contact for price MILES 7072, Ratio: 279 ConditionUsedRear End2.79 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2023Stock Number896581-5 MLS Number14222111CategoryDifferentials, Rear Last Updated5/14/2026 LocationFarr West, UT, US Sold ByRocky Mountain Truck Parts (855) 980-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Meritor-Rockwell RT20160 Rear Differential for a 2015 Peterbilt 579 Recently Updated Contact for price MILES 562802, Ratio: 373 ConditionUsedRear End3.73 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2015Stock Number284918-5 MLS Number13682935CategoryDifferentials, Rear Last Updated5/14/2026 LocationFarr West, UT, US Sold ByRocky Mountain Truck Parts (855) 980-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 12 Photos View 0 Videos Meritor-Rockwell MD2014X Rear Differential for a 2023 Peterbilt 579 Contact for price Meritor Rockwell MD20-14T Front Rear Differential Assembly For Sale 2.79 Ratio - Capacity: 20,000 lbs. - Used - May have some cosmetic blemishes (see photos). Give us a shout by phone, email... ConditionUsedRear End2.79 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2023Stock NumberPT-0837-7 MLS Number12738560CategoryDifferentials, Rear Last Updated5/14/2026 LocationYork, ON, Canada Sold ByLomoca Inc. (833) 835-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2019 Eaton RSP40 Rear Differential for a Peterbilt 579 $375 USD (USED) Eaton RSP40 Ratio: 3.36 Side Gear Splines: 41 W/ Locker: NO Cast#: N/A Ref# N/A ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part NumberN/AStock Number25781167 MLS Number13543451CategoryDifferentials, Rear Last Updated11/7/2025 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos 2020 Meritor MR2014X Rear Differential for a Peterbilt 579 $375 USD (USED) Meritor MR2014X Ratio: 3.08 Side Gear Splines: 41 W/ Locker: NO Cast#: 3200F2216 Ref# N/A ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part NumberN/AStock Number25791614 MLS Number13572804CategoryDifferentials, Rear Last Updated5/31/2025 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos Meritor-Rockwell MX14 Rear Differential for a 2015 Peterbilt 579 Recently Updated Contact for price MERITOR MX14 3.70 RATIO 40000 LBS NO LOCKS, Ratio: 3.7 ConditionUsedRear End3.70 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2015Stock Number3364-PETE-3 MLS Number13343932CategoryDifferentials, Rear Last Updated5/13/2026 LocationSTURGEON COUNTY, AB, Canada Sold ByBadger Truck Parts Ltd. (855) 624-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2015 Eaton R23-190 Rear Differential for a Peterbilt 579 $375 USD (USED) Eaton R23-190 Ratio: 2.53 Side Gear Splines: 46 W/ Locker: NO Cast#: Could Not Verify Ref# N/A ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part NumberN/AStock Number25857893 MLS Number13790523CategoryDifferentials, Rear Last Updated12/31/2025 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2019 Paccar MR2014P Rear Differential $2,058 USD (USED) Paccar MR2014P Ratio: 2.93 Side Gear Splines: 41 W/ Locker: NO Cast#: V2544 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Stock Number25867301 MLS Number13867240CategoryDifferentials, Rear Last Updated11/19/2025 LocationDes Moines, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2020 Meritor MR2014X Rear Differential for a Peterbilt 579 $360 USD (USED) Meritor MR2014X Ratio: 2.64 Side Gear Splines: 41 W/ Locker: NO Cast#: 3200F2216 Ref# MR2014X3MFRNN24-264 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part NumberMR2014X3MFRNN24-264Stock Number25890891 MLS Number13974661CategoryDifferentials, Rear Last Updated11/10/2025 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2017 Meritor RS23160 Rear Differential for a Peterbilt 579 $1,156 USD (USED) Meritor RS23160 Ratio: 3.07 Side Gear Splines: 46 W/ Locker: YES Cast#: 3200.S-1891 Ref# 3200-S-1891 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part Number3200-S-1891Stock Number25866895 MLS Number13826610CategoryDifferentials, Rear Last Updated9/22/2025 LocationKansas City, MO, 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 $415 USD (USED) Eaton RSP40 Ratio: 3.25 Side Gear Splines: 41 W/ Locker: NO Cast#: N/A Ref# N/A ConditionUsedFits To Make(s)PeterbiltFits To Model(s)579Part NumberN/AStock Number25830535 MLS Number13752116CategoryDifferentials, Rear Last Updated8/16/2025 LocationSioux Falls, SD, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 0 Photos View 0 Videos 2007 Eaton RSP40 Rear Differential for a Peterbilt 387 $795 USD USED EATON RSP40 REAR DIFFERENTIAL ASSEMBLY - RATIO: 3.55 ConditionUsedRear End3.55 ratioFits To Make(s)PETERBILTFits To Model(s)387Stock Number57994 MLS Number12820534CategoryDifferentials, Rear Last Updated5/1/2024 LocationCrandall, TX, US Sold ByTim Jordan's Truck Parts Inc. (833) 359-___ SHOWNUMBERCall Seller Email Seller Save More Info