Smoke smells like trans fluid

Hey everyone! It's a '00 zr2, usually after 15-20mins driving I see smoke blowing out rear at highway speed. If I'm driving slow same results with smoke just rolls out from hood. Smells like trans fluid although doesn't seem like the level is any lower yet....just thought I would toss this on here to see if anyone else has seen this! Guessing gasket when under pressure, I would guess passenger side hitting manifold but I haven't seen obvious leaks don't know where to start, thanks for any ideas!

Sounds like a cooler line leaking, get to this asap.

Buy a intake gasket