It's all good, I check everything..... ATF for the transfer case. I do have a small leak on the front output and it sure spray things around ..... nothing bad so i keep pushing it.

The smell is definitely gear oil and for me that means axle or transmission.

So I checked the vents.
Missing totally oon the front diff
Tranny vent is there

Removed the whole center console..... spent the day trying to find the inner boots because they were all falling apart .... I could see the tranny and road through...

what a pain.... they don;t make them any more. So I used electrical tape to fix the shifter seal and I bought an aftermarket er boot and turned it to make it look like the inner boot and drilled it to the plate...
Put the outer boot and console back.... that should prevent smells from the tranny to come up

Now I still have to take care of the front diff vent.... I understand from readings that it is important