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.Google+
Car Problem Reports
Buick Park Avenue Rubber Transmission Cooler Lines Can Leak Fluid
Buick Park Avenue Problem
Average Mileage: 146,330 mi (97,650 mi - 196,000 mi)
Visitor, 1994 Buick Park Avenue, 196,000 mi
Transmission cooler lines leak. Have not fixed it yet.
Visitor, 1993 Buick Park Avenue, 158,000 mi
Park Avenue Ultra leeking at the rubber hose more like seepping through the cracks in the hose and at the double clamps. Replaced with a one piece no clamps compression fittings upper part# 624-150 amd lower part #624-151 $26.90 parts came in sealed plastic bags for both and $9.95 FedX shipping OH to AZ total parts cost $36.85 plus dextron transmission fluid as needed.
Visitor, 1995 Buick Park Avenue, 160,000 mi
Lower (outlet) line seen dripping fluid at the pressed joint between the rubber hose and the metal pipe. Leak appeared at the start of Winter. Replaced with $17.50 Dorman 624-151 part.