Transmission Fluid Leak From Cooler Line on Pontiac Trans Sport

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

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Average mileage: 132,800 (72,000–209,000)
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998
14 people reported this problem
3 people shared problem details
transmission cooler lines leaked after buying used van. Not sure the exact time but it ruined the transmission 2 months after buying the van with only 98,000 miles on it. Now I check the fluids more frequently and I have to put in quarts of tranny fluid on a regular basis. Seems like there is another leak I cannot locate.
transmission line leak caused all the fluids to go out and transmission went bad because of it.
Rubber line blew off draining fluid while driving. Put tube back on clamped then added fluid and drove home.
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