99 Pathfinder transmission fluid spraying and engine light...

[OE812]

I am having major issues with my 99 Pathfinder we purchased on July 8, 2006. I had it in the dealership service dept. for a month to change out the lifters on right bank. While in the shop, I had the O2 sensor, timing belt, tensioner, and water pump changed. Now the fun starts. Picked it up last week and noticed that it started surging at 40-45mph and stalling from a stop. Then the check engine light illuminates...then it goes off...then on!? I brought it back to the dealership and they said I needed to provide a spark plug changeout and fuel system service. Keep in mind; none of this was happening prior to having them change the timing belt and 02 sensor. I drove the pathy home today and changed the plugs and went back with the NGK platinum plugs. I then cleaned the throttle body. More fun; test drove it on the highway and accelerated briskly up to 80mph and noticed lots and lots of smoke and a oily film hitting the rear windshield! I pulled over and transmission oil is everywhere. Got it home and dried off the oil underneath and spent about a hour trying to find the source of the oil but couldn't. The gaskets look fine and nothing leaking from the linkage.

I need some serious help on this one. This is driving me insane. Where do I start.

thanks,

[NISTECH]

Check the transmission cooler lines attached to the radiator. They probably disconnected them when they did the Tbelt. Then probably for got to reclamp them.