I was on my way back from corpus yesterday and felt a slight hesitation every once in a while. I looked under truck half way home and noticed some tranny fluid under truck. Thought it might be a seal but looked tonight and appears to have come from overflow vent.
Temperature was normal the whole time and no more hesitation after i stopped. Any suggestions???

 

check the dip stick.

the extra fluid had to of come from somewhere. if it does not look like regular fluid, milky, foaming, etc then i would find the problem fast. the only part that the two fluids can mix is in the cooler inside the radiator.

2nd, are you sure it is the transmission and not the transfer case? the transmission is a little silver plug thingy and the transfer case has a tube that runs over the top of the transmission. if it is the transfer case then check the fluid in it. if the seal is bad, the transmission fluid can get into the transfer case and raise the level till it comes out the breather or it is having anther issue that is raising the temp high enough to have it come out the tube

 

Thanks for the info, Im in the process of changing the filters and investigating more where it came from. Thanks again