Automatic Transmission Oil Cooler Flushing: Notes

GM studies indicate that plugged or restricted transmission oil coolers and pipes cause insufficient transmission lubrication and elevated operating temperatures which can lead to premature transmission wear-out. Many cases could have been prevented by following published procedures for transmission oil cooler flushing and flow checking. This procedure includes flushing and flow checking the auxiliary transmission oil cooler, if equipped. GM requires that transmission oil cooler flushing and flow checking be performed whenever a transmission is removed from the vehicle for service within warranty, including:

• Goodwrench SRTA
• Major overhaul
• Torque converter replacement
• Oil pump replacement

Only AC Delco T-IV GM automatic transmission fluid (Part No. 88900925) should be used when doing warranty repair on Vibe automatic transmissions.

Tools Required

• Transmission Oil Cooler and Line Flusher
• Transmission Oil Cooler Flushing Fluid
• Measuring cup
• Funnel
• Water supply, hot water recommended
• Water hose, at least 16 mm (5/8 in) ID
• Shop air supply with water/oil filters, regulator and pressure gage
• Air chuck with clip, if available
• Oil drain container
• Pail with lid, 19 liter (5 gallon)
• Eye protection
• Rubber gloves