Hi Ken,?
Not sure if helpful, but I also have a ’97 EVC that currently has about 107,000 miles. I recently installed a trans cooler at 105,000 along with a rebuilt transmission.?
Since installing and monitoring the ScanGauge (at 95,000 miles), I noticed that the engine water temp was typically between 190-210 F. The trans temp would fluctuate well into the 250’s under heavy load, particularly in the stop and go traffic of the city and on long mountain pass climbs. When it failed (no 4th gear), temps spiked to 280 F before I was able to safely pull off and cool down.
Since installing a GoWesty trans cooler, engine water temps have stayed roughly the same, and I’ve logged 230 F on the transmission temps once during a hot summer day in stop and go traffic. Turning on the A/C to force the radiator fans on got the temps back down to nominal range (~200 F) within 10 minutes, despite stop and go traffic.
I am in Los Angeles, and it’s not getting any cooler here.?
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interesting point. I put the tranny cooler on as soon as I bought the van so I don't have a comparison to check it with prior to the installation. But a previous one I owned didn't seem to run hot. I'll play around with the tranny cooler and see if that indeed is the issue.
