Oil Cooler & Lines - Transmission

  • 2007-12 Kia Rondo Transmission Oil Cooler

    $110.60
    Save 53%
    List: $233.95 Save: $123.35
    Part #: 1ATRX00084

    IN STOCK

  • Toyota Camry Solara Lexus ES300 Transmission Oil Cooler

    $197.06
    Save 54%
    List: $424.95 Save: $227.89
    Part #: 1ATRX00082

    IN STOCK

  • 2003-09 Dodge Ram 2500 3500 Transmission Oil Cooler Dorman 918-233

    $199.95
    Save 27%
    List: $274.95 Save: $75.00
    Part #: 1ATRL00085

    IN STOCK

  • Chevrolet GMC Cadillac Transmission Oil Cooler Dorman 918-213

    $159.95
    1
    Save 26%
    List: $216.95 Save: $57.00
    Part #: 1ATRL00082

    IN STOCK

  • Radiator Side Transmission Oil Cooler Connector Dorman 800-619

    $21.95
    Save 21%
    List: $27.95 Save: $6.00
    Part #: DMTRL00019

    IN STOCK

  • Chevrolet GMC Cadillac Transmission Cooler Line Dorman 624-117

    $35.95
    Save 31%
    List: $51.95 Save: $16.00
    Part #: DMTRL00005

  • 2001-04 Dodge Stratus Chrysler Sebring Inlet & Outlet Transmission Cooler Hose Pair Dorman 1ADMK00008

    $39.95
    1
    Save 30%
    List: $56.95 Save: $17.00
    • Quantity: Pair
    • Part #: 1ADMK00008

    IN STOCK

  • 1994-98 Dodge Ram 2500 3500 Transmission Oil Cooler Dorman 624-352

    $64.95
    Save 27%
    List: $88.95 Save: $24.00
    Part #: 1ATRL00090

    IN STOCK

  • Chevrolet GMC Cadillac from Upper Radiator to Transmission Transmission Cooler Line Dorman 624-153

    $74.95
    Save 35%
    List: $115.95 Save: $41.00
    Part #: 1ATRL00096

    IN STOCK

  • Chevrolet Lower Radiator to Transmission Transmission Cooler Line Dorman 624-116

    $64.95
    Save 34%
    List: $98.95 Save: $34.00
    Part #: 1ATRL00095

    IN STOCK

  • Honda Civic Odyssey Pilot Acura MDX Transmission Return Line Honda OEM 25211-PLM-A06

    $24.95
    Save 11%
    List: $27.95 Save: $3.00
    • Part #: HDTRL00002

    IN STOCK

  • 2001-05 Honda Civic Transmission Pressure Line Honda OEM 25212-PLM-A06

    $29.95
    Save 21%
    List: $37.95 Save: $8.00
    • Part #: HDTRL00001

    IN STOCK

  • Chevrolet GMC Cadillac Transmission Cooler Line Dorman 624-124

    $74.95
    Save 29%
    List: $104.95 Save: $30.00
    Part #: DMTRL00007

    IN STOCK

  • Chevrolet Buick Pontiac Transmission Cooler Line Dorman 624-971

    $32.95
    Save 31%
    List: $47.95 Save: $15.00
    Part #: DMTRL00012

    IN STOCK

  • Passenger Side Transmission Cooler Line Dorman 624-956

    $26.95
    Save 37%
    List: $42.95 Save: $16.00
    Part #: DMTRL00010

    IN STOCK

Oil Cooler & Lines - Transmission

What is the transmission oil cooler and where is it located? 

A transmission oil cooler helps keep your automatic transmission fluid from getting too hot.  The friction generated by the moving parts of the transmission cause the parts, and the fluid or oil, to heat up.  Some vehicles use a transmission oil cooler to cool off the fluid.  This is seen most often in vehicle’s whose transmissions are expected to work hard—like trucks and SUVs intended for towing. 

The fluid flows from the transmission oil pan through rubber or metal lines to the transmission oil cooler, which is essentially like a radiator.  Just like a radiator, the cooler has tubes that absorb heat from the fluid, and fins that dissipate the heat into the air.  The oil cooler is usually mounted behind the grille in front of the radiator. Transmission oil cooler lines run through the engine bar to connect to the oil cooler, which is usually mounted behind the grille in front of the radiator.

How do I know if my ­­­­ transmission oil cooler needs to be replaced?        

Like a radiator, a transmission oil cooler can become clogged or develop leaks.  Either clogs or leaks will make the oil cooler less effective at cooling the transmission fluid.  As you might expect, the biggest problem that oil cooler lines face is leaking. The lines can leak oil, which reduces the overall functioning of the oil cooling system. This puts strain on the transmission.  The transmission might slip during gear shifts or might change gears abruptly.  Shifts might occur at odd times, either too early or too late.  If you change the transmission fluid, you might find that there’s an unusual amount of sludge or debris in the fluid. 

If oil is leaking onto hot parts under the hood, you may see black smoke rising from under the hood.  Leaking oil can also get into the engine, causing it to run poorly and emit black smoke out of the exhaust.  The best way to identify leaks is by visually inspecting the cooler. 

Can I replace the transmission oil cooler myself?  

Many do-it-yourselfers are intimidated by the idea of working on their transmissions.  We don’t blame them; transmissions are complicated.  Replacing the transmission cooler, though, is one transmission job that a driveway mechanic can complete.  Removing your grille should help you access the oil cooler.  You’ll want to have a catch pan ready before you disconnect the oil cooler lines.  Disconnect the lines using a line wrench.  Some oil will drain out.  If you're replacing the lines, then you can pull them out out. Manuevering the lines through the engine bay might be the most challenging part of the job, particularly if you have metal lines. At this point, you can unbolt the cooler from the radiator support.  Install the new one and connect the hoses.  You will need to add transmission fluid to replace what was lost during the repair.   

 

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