Transmission Fluid Leak From Cooler Line on Cadillac DTS

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.

RepairPal Verified
Average mileage: 95,210 (56,486–140,000)
5 model years affected: 2006, 2007, 2008, 2009, more2010
19 people reported this problem
7 people shared problem details
2006 Cadillac DTS88,789
There is a small leak from the back transmission coolant line. How can this problem get resolved without the engine having to be removed?
Upvoted (12)Flag Inappropriate
2006 Cadillac DTS56,486
Transmission cooling line leaks
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?
2008 Cadillac DTS130,000
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...
2008 Cadillac DTS86,250
Transmission line connector broke. I lost all fluid. Fluid all over my brakes.
2007 Cadillac DTS120,000
problem was identified and we are searching for corrective action
2007 Cadillac DTS60,000
Slow transmission fluid leak from cooling line at rear of transmission
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