tranny identification
 

I have an 03 rodeo 4x4 4 door with a v 6 automatic. I tried to change the tranny pan gasket but the one from the store is square. They salesperson said the only automatic is a 4L30e. My tranny has a long rectangular pan. No even close to square. What have I got? BTW, I just bought the thing, and don't know Rodeo's well.
l