Smoking tranny

I have a 1993 740IL that the transmission leak fluid out of the when I drive at 80 to 90 mph for over 25 min. I have changed the Trans cooler, gasket, filter, oil, and shifter seal on both sides. I was told the fluid is come out of a breather tube. I get no Trans problem error and it doesn’t slip, just smoke from the Trans fluid off the exhaust pipes. :banghead:

I have a 1993 740IL that the transmission leak fluid out of the when I drive at 80 to 90 mph for over 25 min. I have changed the Trans cooler, gasket, filter, oil, and shifter seal on both sides. I was told the fluid is come out of a breather tube. I get no Trans problem error and it doesn’t slip, just smoke from the Trans fluid off the exhaust pipes. :banghead:


Try disconnecting the return cooler line at the transmission and make sure the tranny fluid is returning from the cooler. You may have a plugged cooling line. Burping fluid is often a sign the fluid is overheated.