1992 Chevt blazer Tahoe 2wd 4.3L Auto
My transmission dumped 7-8 quarts of fluid. No apparent leak found. Filled it back up and off again no leaking. Back in 2002 it did this same thing pulling a bass boat. No leaks found. Pulled a enclosed trailer off and on since then with no dumping of its fluid then pulling it last week empty it does it again (2nd time) still no leaks found only difference this time is it also started to idle at 1800rpm's all the time. I did do a complete rebuild on the throttle body checked all sensors, still idles high next is the intake gasket when I have time, tried to look at top of trans with flash light & mirror to see if the leak came from the top side its dry I have a tiny leak in rear seal about a quart every 6 months and its dry compared to the rest of it. Cleaned it all off and I can not find the leak area do not know where it came from. Why did this happen. It never stopped pulling in gear no slipping and I had full use out of it. I just stopped added more fluid and continued on I turned on my a/c and that reduced my rpm's some. No check engine lights and I checked it with my snap-on brick