HomeBelts and Cooling > Hoses and PipesDorman 624-040 Automatic Transmission Oil Cooler Hose Assembly - Auxiliary Cooler Inlet (Lower), Inlet (Upper) or Inlet From Radiator (Upper)
Part #: 624-040

Dorman 624-040 Automatic Transmission Oil Cooler Hose Assembly - Auxiliary Cooler Inlet (Lower), Inlet (Upper) or Inlet From Radiator (Upper)

Inlet (Upper), Inlet From Radiator (Upper), and Auxiliary Cooler Inlet (Lower)
8 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: Buick, Oldsmobile, and Pontiac, 88, 98, Bonneville, LeSabre, LSS, and Park Avenue
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Reliable Automatic Transmission Oil Cooler Hose Assembly

The Dorman 624-040 automatic transmission oil cooler hose assembly is designed to provide durable and flexible fluid transfer for your vehicle's transmission cooling system. Engineered to meet the demands of Buick, Oldsmobile, and Pontiac models, this hose assembly ensures consistent performance under varying temperature and pressure conditions.

  • Compatible with Buick 88, 98, LeSabre, and Park Avenue models
  • Also fits Oldsmobile 88, 98, and LSS models
  • Suitable for Pontiac Bonneville and other specified models
  • 32-inch length with natural hose color for easy identification
  • Constructed with a combination of metal and rubber materials for flexibility and durability
  • Male threaded fittings on both ends for secure connections
  • Operates reliably between -40°F and 329°F
  • Maximum working pressure of 100 PSI
  • Flexible design without internal spring for smooth fluid flow

Durable Construction and Performance Features

The Dorman 624-040 hose assembly combines metal and rubber materials to provide a flexible yet robust solution for automatic transmission oil cooling. Its 32-inch length accommodates a variety of routing needs within the engine bay. Both ends feature male threaded fittings, ensuring a tight and leak-resistant connection to the transmission cooler lines. The hose is designed to withstand a maximum working pressure of 100 PSI and operate effectively in temperatures ranging from -40°F to 329°F, making it suitable for a wide range of driving conditions.

Compatible Vehicle Applications

This transmission oil cooler hose assembly is compatible with several Buick, Oldsmobile, and Pontiac vehicles, including:

  • Buick 88, 98, LeSabre, and Park Avenue
  • Oldsmobile 88, 98, and LSS
  • Pontiac Bonneville

Ensure proper fitment by verifying your vehicle model and year before installation.

Common Issues Addressed by This Hose Assembly

  • Leaking or cracked transmission cooler hoses causing fluid loss
  • Reduced transmission cooling efficiency due to damaged hoses
  • Swollen or hardened hoses leading to restricted fluid flow
  • Failed hose connections resulting in transmission overheating
  • Wear from exposure to extreme temperatures and pressure fluctuations

Installation Notes and Tips

When installing the Dorman 624-040 hose assembly, ensure that all connections are clean and free of debris. Use appropriate tools to tighten the male threaded fittings securely without over-tightening, which could damage the threads. Inspect the routing path to avoid sharp bends or contact with moving parts that could cause premature wear. It is recommended to replace any worn clamps or seals during installation to maintain system integrity.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. While specific warranty details for part number 624-040 should be confirmed at the time of purchase, Dorman typically offers limited warranties covering defects in material and workmanship to ensure customer confidence.

BrandDorman
Part Number624-040
Hose ColorNatural
Length32
End 1 TypeMale threads
End 2 TypeMale threads
Contains SpringNo
Maximum Working Pressure100
Hose MaterialMetal
Hose MaterialRubber
FlexibleYes
Maximum Operating Temperature (┬░F)329
Minimum Operating Temperature (┬░F)-40
Package Contents1 transmission line

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1997BuickLeSabreInlet (Upper)From Radiator; To 2/18/97
1997PontiacBonneville3.8LV6Inlet From Radiator (Upper)wo/Auxiliary Oil Cooler; To 2/18/97
1996BuickLeSabreInlet (Upper)From Radiator
1996BuickPark AvenueInlet (Upper)From Radiator; wo/Auxiliary Oil Cooler; wo/Trailer Tow Package
1996Oldsmobile88Inlet From Radiator (Upper)Fits vehicles without Auxiliary Oil Cooler.
1996Oldsmobile98Inlet From Radiator (Upper)Fits vehicles without Auxiliary Oil Cooler.
1996OldsmobileLSSInlet From Radiator (Upper)Fits vehicles without Auxiliary Oil Cooler.
1996PontiacBonnevilleAuxiliary Cooler Inlet (Lower)To Transmission

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

This part directly replaces or is cross-referenced with the following part numbers:

256241775801143

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.