Cadillac transmission

I was driving it home and it got to the point where it seemed like it was in neutral. I would press the gas and it wouldnt accelerate. It happened a couple times before I parked it. Recently, I started it back up and let it idle. The transmission got really hot. When I first crank it over, it goes into reverse and into 1st gear fine, but after a while it starts to slip. I have a transmission warranty that covers external damage and was hoping whatever problem I am having with this transmission is covered under that warranty. I didnt drive over something and cause damage. The overheating might be coming from some internal problem that is causing the cooling system for the transmission to fail. What do you think? The transmission warranty covers both time and mileage, both of which I am under; below max time and below max mileage

The radiator cracked and I procrastinated with replacing it. I told a friend what happened and he said that the cooling system for the radiator of a car also cools the transmission. When the transmation got real hot, I thought thats what happened. The transmission works when the car first turns on, but when it runs for a little bit, it gets hot and slips. The 'check transmission light' comes on. The transmission doesnt look dark, but it smells funny.

There doesnt seem to be anything wrong with the engine. It sounds and runs normally, but the transmission is overheating, I called about what voids the warranty and the only thing that applied to my car was any 'exterior damage'. I guess this is damage to the transmission housing or something. Do you know what the problem could be? I put a good amount of 'stop leak' in the radiator over the course of a few months to keep it from leaking out radiator fluid. Im wondering if that messed something up in the transmission and the cooling fluid couldnt flow through, causing it to overheat and cause the gears to slip when it gets hot and the odor to the transmission fluid. It doesnt look burnt but it has a smell to it.

Sounds like you may have gotten coolant in transmission. If the cooler inside the radiator fails, one of 2 things can happen. Either coolant goes into trans, or tranny fluid will go into radiator. Had it happen to me. Coolant in transmission. Check fluid. Does it look like nestle pink quick?