Transmission Fluid Leak From Cooler Line on Pontiac Sunfire

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: 103,428 (66,000–160,000)
Drive Train affected: Automatic Transmission
11 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005
20 people reported this problem
6 people shared problem details
2002 Pontiac Sunfire- Automatic Transmission130,000
Not fixed, can see fluid leaking from hose, also transmission fluid leaking..
1997 Pontiac Sunfire- Automatic Transmission
Tranny cooler line leak Belt tensioner A/c compressor Power steering line failure Alternator Thermostat housing Etc........
2002 Pontiac Sunfire- Automatic Transmission140,000
Lower automatic tranny line was leaking ATF at the rubber-metal junction. Bought replacement ACDelco lines from amazon for 29 dollars and was perfect.and added some tranny fluid dextron/merconIII type .
1997 Pontiac Sunfire- Automatic Transmission70,000
LOWER LINE
1995 Pontiac Sunfire- Automatic Transmission160,000
THE UPPER LINE RUSTED AND CORODED OFF AND LEAKED ATF FLUID EVERY WERE HOW CHECK FLUID WHEN PUT FIXED AND PUT BACK IN NO DIPSTICK 97 SUNFIRE 2.2L AUTOMATIC
2005 Pontiac Sunfire- Automatic Transmission66,000
hose has some oil on it,power stearing fluid low
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