Hello everyone, I brought this up a few years ago, but I thought I'd bring it up again with a clearer understanding of things. The basic problem is that my original non-rebuilt Edsel's 2 speed automatic transmission overflows out the dipstick tube when the engine is cold. Typically it does it when the engine reaches upper RPMs. (Example: the engine operating at increased RPM for warm up or after the engine is starting to warm up and I step on the gas pedal to drop the carburetor out of choke mode) Once warm it won't do it anymore. It is not overfilled and the original dipstick is being used. Also, I've looked at the vent at the top of the trans and even used compressed air to blow it out. I thinks it's alright. The only changes I have done are add an aftermarket trans oil cooler and spin on transmission filter. The cooler does sit high in relation to the cooler lines. I mounted the cooler even with the top of the radiator. The spin on filter is mounted high too, next to the cooler. I understand it probably needs a rebuild, but before that happens, I'd like to drive it for a few years. The transmission works great besides the overflows. It shifts nicely and at the correct speeds. If its the seals, I'll live with it for a while, but I just want to make sure it's not doing this because of something I've done. I've been thinking about putting a check valve inline with the cooler lines so that nothing drains back when I park. Thoughts?