With my lack of knowledge I typed "NV3500" into google and came to this link.
http://dodgeram.org/tech/transmission/nv3500_spec.htm
Enjoy
Manufactured by New Venture Gear
Order code: DDC
Input torque rating: 300 ft-lb
Max GVWR: 7,200 lb
Max GCVWR: 11,000 lb
Fluid Capacity: 4.8 pints to the bottom of the fill plug
Weight (with oil): 110 lb
Mopar Manual Transmission Lubricant (PN 4761525) is the ONLY lubricant recommended for the NV3500.
Fill Plug: Front housing on passenger side
Drain Plug: Bottom of the front housing
HD Version
Manufactured by New Venture Gear
Input torque rating: 340 ft-lb
Max GVWR: 7,200 lb
Max GCVWR: 11,000 lb
Fluid Capacity: 2.0L
Weight (with oil): 110 lb