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Mopar 55057191AC Automatic Transmission Oil Cooler Hose Assembly - Inlet and Outlet or Inlet To Transmission (Front)OE Quality 60-Day Returns
Part #: 55057191AC

Mopar 55057191AC Automatic Transmission Oil Cooler Hose Assembly - Inlet and Outlet or Inlet To Transmission (Front)

Inlet and Outlet and Inlet To Transmission (Front)
4 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ram, 2500 and 3500
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Mopar Automatic Transmission Oil Cooler Hose Assembly

This Mopar automatic transmission oil cooler hose assembly is a direct-fit replacement for select Ram heavy-duty trucks with the 6-speed 66RFE automatic transmission. It is built for the oil cooler pressure and return circuit, helping maintain proper transmission fluid routing in demanding towing and hauling conditions.

Part number 55057191AC is listed for 2012-2013 Ram 2500 and 2012-2013 Ram 3500 applications with the specified cooler hose locations.

  • Genuine Mopar replacement for transmission oil cooler hose service
  • Fits 2012-2013 Ram 2500, inlet and outlet
  • Fits 2012-2013 Ram 3500, inlet to transmission (front)
  • For 6-speed automatic 66RFE transmission applications
  • Supersedes part number 55057191AB

Detailed Fitment and Function

Use this automatic transmission oil cooler hose assembly to restore the fluid path between the transmission and cooler circuit on compatible Ram trucks. The assembly is specified for the oil cooler pressure and return system, making it a direct service part for Ram 2500 and Ram 3500 models equipped with the 66RFE transmission. If you are searching for a Ram 2500 transmission cooler hose, Ram 3500 transmission oil cooler hose, or Mopar 55057191AC replacement, this part matches the listed applications.

Common Issues This Part Can Address

  • Transmission fluid seepage at the cooler hose assembly
  • Cracked, hardened, or damaged hose sections
  • Restricted fluid flow in the oil cooler pressure and return circuit
  • Service replacement after cooler line wear or corrosion
  • Loss of proper transmission fluid routing on listed Ram trucks

Installation Notes and Tips

Verify transmission type and hose location before ordering. This part is listed for the 6-speed automatic 66RFE transmission and specific inlet/outlet positions on 2012-2013 Ram 2500 and Ram 3500 models. Inspect mating connections, seals, and adjacent cooler lines during service, and confirm the routing matches the original assembly before installation.

Quality Assurance

Mopar OE replacement parts are engineered to match factory specifications for the listed applications. Part number 55057191AC supersedes 55057191AB.

This part fits 4 vehicles. Search below:

YearMakeModelSubmodelDrive TypeTransmissionLitersCylindersPositionNotes
2013Ram2500STRWDManual6.7LL6Inlet and OutletHOSE AND TUBE, Oil Cooler Pressure and Return, 6-Spd Automatic 66RFE Transmission;Supersedes part # 55057191AB
2013Ram3500STRWDAutomatic5.7LV8Inlet To Transmission (Front)HOSE AND TUBE, Oil Cooler Pressure and Return, 6-Spd Automatic 66RFE Transmission;Supersedes part # 55057191AB
2012Ram2500ST5.7LV8Inlet and OutletHOSE AND TUBE, Oil Cooler Pressure and Return, 6-Spd Automatic 66RFE Transmission;Supersedes part # 55057191AB
2012Ram3500ST5.7LV8Inlet To Transmission (Front)HOSE AND TUBE, Oil Cooler Pressure and Return, 6-Spd Automatic 66RFE Transmission;Supersedes part # 55057191AB

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

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