Oil Cooler Flushing: Notes
CAUTION:
Flushing Solution (J-35944-22) is environmentally safe, yet powerful enough to cut through transmission fluid to dislodge any contaminants from the cooler. The safety precautions on the label regarding potential skin and eye irritations associated with prolonged exposure are typical precautions that apply to many similar cleaning solutions. It should be noted that according to General Motors, use of other non-approved fluids for cooler flushing can have an adverse reaction to the seals inside the transmission.
NOTE:
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 or oil pump replacement.
NOTE:
Only GM Goodwrench DEXRON-III(R) ATF should be used when doing warranty repair on GM transmissions. Tools required, Transmission Oil Cooler and Line Flusher (J-35944-A), Transmission Oil Cooler Flushing Fluid (J 35944-22), measuring cup, funnel, water supply (hot water recommended), water hose (at least 5/8" (16 mm) ID), shop air supply (with water/oil filters, regulator and pressure gauge), air chuck (with clip if available), oil drain container with lid, eye protection and rubber gloves.