Umm, what model year do you have and what engine? After 2011 the trans went to a ZF which has a very distinct and difficult fill process that's required.

 

The 2011-13 V6 have the 5-spd transmission and the 2011-13 V8 have the 6-spd transmission. Both the 2014 and later V6 and V8 models have the ZF 8-spd transmissions.

 

If you don't see a trans dipstick then you most likely have a newer durango with a ZF trans. The ZFs are a PITA to check and fill for proper oil level. This vid gives a good rundown on what is involved.

 

But, of course she hasn't bothered to reply with the year or engine of her vehicle.

 

Must be an ZF if the OP can't locate a dipstick.

 

2014 Durango atf fluid capacity

 

@ newkid:
The '14 Durangos have the 8 speed transmission, which does not use ATF+4. The older Nag1 5 speed uses the ATF+4.
If you are looking for how much it holds, check the owner's manual. The required fluid is pricey, and the level check/filling procedure is crazy!

Don