Originally Posted by mr500cm

Mike, the problem seems to be heat related. It's only when I'm in stop and go traffic with the ac on. Otherwise it's fine.

Originally Posted by sonnax

Many transmission shops helped to find the root cause of the overheating issue, but ATEX Transmissions in Port Richey, Fla., stands out for their effort. The shop manager, Sean St. John, logged hundreds of road test miles with vehicles equipped with flow monitoring devices to record cooler flow and strategically placed pyrometers to record temperatures. Sean was the first person to recognize that after warm up, when the vehicle would come to a stop, the cooler flow would drop to zero. The flow would resume when the idle was raised above 1200 RPM. Most importantly, he noticed that the temperature of the oil exiting the converter would increase dramatically when the cooler flow dropped to a certain level. Sean's observations lead to the conclusion that the heat in the converter was caused by the clutch dragging on the cover during periods of low TCC charge (release) oil flow and not as a result of slipping during TCC apply, as previously thought. But why was the low flow happening? This became easier to understand when a pressure gauge was added and transmission line pressure was monitored at the same time as cooler flow. If the line pressure dropped at the same time as the cooler flow was decreasing, you would be looking for conditions such as low fluid level, severely worn valve bores or possibly a severely worn pump. But, since the line pressure remained high when the flow rate decreased, an out-of-position PR valve was more likely the cause of poor cooler flow.