Oil Cooler & Lines - Transmission

  • Chevy GMC Buick Olds Isuzu Saab Passenger Side Transmission Cooler Line Dorman 624-956

    Ships Same Day for orders placed by 4pm ET

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

    IN STOCK

  • Dodge Ram 2500 3500 Lower Transmission Cooler Line Dorman 624-893

    Ships Same Day for orders placed by 4pm ET

    $114.95
    Save 38%
    List: $185.95 Save: $71.00
    Part #: 1ATRL00118

    IN STOCK

  • 1995-99 Dodge Neon Plymouth Neon Driver Side Inlet Transmission Cooler Line Dorman 624-341

    Ships Same Day for orders placed by 4pm ET

    $21.95
    Save 29%
    List: $30.95 Save: $9.00
    Part #: 1ATRL00055

    IN STOCK

  • Chevy Buick Pontiac Transmission Cooler Line Dorman 624-122

    Ships in 1-3 Business Days

    $32.95
    Save 34%
    List: $49.95 Save: $17.00
    Part #: DMTRL00006

  • 2007-11 Jeep Wrangler Inlet & Outlet Transmission Cooler Line Dorman 624-997

    Ships Same Day for orders placed by 4pm ET

    $131.95
    Save 37%
    List: $209.95 Save: $78.00
    Part #: DMTRL00023

    IN STOCK

  • Chevy Pontiac Olds Transmission Cooler Line ACDelco 22600707

    Ships Same Day for orders placed by 4pm ET

    $63.95
    Save 37%
    List: $100.95 Save: $37.00
    Part #: 1AACD00072

    IN STOCK

  • Dodge Ram 2500 3500 Transmission Cooler Line Mopar 52028920AH

    PART DETAILS

    Ships Same Day for orders placed by 4pm ET

    $99.95
    2
    Save 35%
    List: $152.95 Save: $53.00
    Part #: MPTRL00002

    IN STOCK

  • Chevy GMC Cadillac (Auxiliary Cooler to Transmission) Transmission Cooler Line Dorman 624-118

    Ships Same Day for orders placed by 4pm ET

    $94.95
    Save 32%
    List: $139.95 Save: $45.00
    Part #: 1ATRL00105

    IN STOCK

  • Chevy GMC Cadillac Transmission Cooler Line Dorman 624-488

    Ships Same Day for orders placed by 4pm ET

    $57.95
    Save 40%
    List: $96.95 Save: $39.00
    Part #: DMTRL00008

    IN STOCK

  • Chevy Buick Pontiac Transmission Cooler Line Dorman 624-958

    Ships Same Day for orders placed by 4pm ET

    $49.95
    Save 37%
    List: $78.95 Save: $29.00
    Part #: DMTRL00011

    IN STOCK

  • Chevy GMC Cadillac Transmission Cooler Line Dorman 624-117

    Ships in 1-3 Business Days

    $33.95
    Save 35%
    List: $51.95 Save: $18.00
    Part #: DMTRL00005

  • Chevy GMC Buick Olds Isuzu Saab Transmission Cooler Line Dorman 624-953

    Ships in 1-3 Business Days

    $65.95
    Save 39%
    List: $108.95 Save: $43.00
    Part #: DMTRL00009

  • Saturn Lower Transmission Cooler Line Dorman 624-984

    PART DETAILS

    • Location: Lower
    $31.95
    Save 33%
    List: $47.95 Save: $16.00
    Part #: 1ATRL00098

    Out of Stock

  • Saturn Upper & Lower Transmission Cooler Line Pair Dorman 624-983, 624-984

    PART DETAILS

    • Quantity: Pair
    $43.95
    1
    Save 33%
    List: $65.95 Save: $22.00
    Part #: 1ADMK00007

    Out of Stock

  • Chevy Pontiac Olds Transmission Cooler Line Dorman 624-147
    $56.95
    Save 34%
    List: $85.95 Save: $29.00
    Part #: DMTRL00002

    Out of 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.   

 

Choose the Make of Your Vehicle

FAST & FREE
SHIPPING

Same Day Shipping

In stock orders ship same day when ordered by 4pm ET. Need your parts faster? Select expedited shipping at checkout.

QUALITY
AUTO PARTS

Guaranteed to Fit

Our team of auto experts work hard to provide you with the highest quality, direct fit replacement auto parts. We know not all auto parts are created equal. This is why we enforce a strict level of product standards and sourcing with every part.

EXPERT USA
CUSTOMER SUPPORT

USA Customer Support

Our goal is to exceed our customers' expectations every day. We are a team of passionate auto enthusiasts who are here to help. If you have a question about our parts or a repair contact us.

HOW-TO
VIDEOS

Instructional Video Library

Our 1A Auto Video Library has thousands of how-to auto repair installation videos specific to year, make and model. Each video guides you with step-by-step instructions to empower you to tackle your own repairs on your car, truck, SUV, or van.

Go To Top
Loading...