Car Problem Reports

Pontiac Montana Rubber Transmission Cooler Lines Can Leak Fluid

Pontiac Montana Problem
9 Reports
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Model Years Affected: 1999, 2000, 2001, 2002

Average Mileage: 195,363 mi (148,900 mi - 219,190 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, , 219,190 mi

    Trans line repaired but now leaking at radiator

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  • Visitor, , 218,000 mi

    I replaced the Rubber hoses.

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  • Transmission caused van to speed away from a slow acceleration rather than transition smoothly through gears. Found oil sprayed up back of van and around undercarriage. Transmission fluid rapidly lost when car was driven. Oil leak was spotted when the car was moved briefly and observed underneath. The rubber hose was corroded through and will be replaced. Parts were ordered from the Pontiac dealer.

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