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.
Car Problem Reports
Pontiac Bonneville Rubber Transmission Cooler Lines Can Leak Fluid
Pontiac Bonneville Problem
Average Mileage: 99,000 mi (75,000 mi - 123,000 mi)
Visitor, 1991 Pontiac Bonneville, 123,000 mi
cut line and added a replacement rubber hose