Transmission fluid on 1998 Isuzu Rodeo

Where do I add transmission fluid?
How often am I supposed to change it?

Asked by for the 1998 Isuzu Rodeo
u have to take ur isuzu to the place u get ur oil changed and ask them to check it... its under the car on the tranny so theres no stick or self check
1 more answer
there is no dip stick on this vehicle. there are two plugs on the transmission, you want the higher on on the pass side of the transmission, need a hand pump to add fluid. there is no easy way to add fluid