Transmission is flaking out :(

[dwoloz]

When the car is first started cold, the transmission acts "funny" for about 10 minutes and then it operates just fine. My assumption is when its cold, the erratic behavior occurs.

What happens is when the car comes to a stop sometimes, you can then no longer propel the car with the pedal; engine revs but no power to the ground. Sometimes at a stop I can hear the transmission make a *pop* sound like it just shifted into neutral (while still in D) but other times I hear nothing and it still doesn't put power to the ground.
I have figured out that when the transmission is still cold, you can prevent this from happening by lightly feathering the throttle, very slight pressure, very slow acceleration. Even doing this sometimes the car will "catch" and suddenly have no power off the line then I have to immediately let my foot off the pedal, then try to give it a light touch again.
Once warmed up everything acts just fine.


Any ideas what is going on?