Car Problem Reports

Cadillac DTS Rubber Transmission Cooler Lines Can Leak Fluid

Cadillac DTS Problem
18 Reports
Me Too

Model Years Affected: 2006, 2007, 2008, 2009, 2010

Average Mileage: 97,865 mi (56,486 mi - 140,000 mi)


An automatic transmission fluid leak may develop from the rubber section of a transmission cooler line. In some cases the rubber section of hose can be replaced. In others, the complete cooler line must be replaced to correct this type of leak.

  • Visitor, , 88,789 mi

    There is a small leak from the back transmission coolant line. How can this problem get resolved without the engine having to be removed?

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  • Visitor, , 56,486 mi

    Transmission cooling line leaks

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  • Visitor, , 130,000 mi

    Upper tranny cooler line pulled out of quick connect at transmission. Lost all fluid within a minute. Good thing it happened in my driveway and not on a highway ir a $25 parts could have caused a $3500 trans replacement. Been a cadi guy all my life and the 2008 DTS has been a money pit...

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  • Visitor, , 86,250 mi

    Transmission line connector broke. I lost all fluid. Fluid all over my brakes.

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  •  Rookie

    The rear coolant line going into the transmission leaks, . Not sure how to fix it? Can't get a wrench on the damn thing. Trying to check out this web site to see if the solution is to pull the Engine Cradle and work from there?

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  • Visitor, , 120,000 mi

    problem was identified and we are searching for corrective action

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  • Visitor, , 60,000 mi

    Slow transmission fluid leak from cooling line at rear of transmission

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