Van starts but does not Move

Good morning,

Does it move in reverse?

https://www.2carpros.com/articles/automatic-transmission-problems

How long since you changed the fluid and filter? I would start there to see if the filter is clogged not allowing fluid to the front pump.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Beyond that, it sounds like an internal failure in the transmission.

Does it make any noise when you put it in gear?

Roy

Okay, I would start by changing the fluid and the filter.

Roy

Changing A/T Fluid
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid. Measure amount of fluid drained and refill with equal amount of new fluid.

Fluid grade:
NISSAN Matic "D" (Continental U.S. And Alaska) or Canada NISSAN Automatic Transmission Fluid.

Fluid capacity (With torque converter): 9.4 l (10 US qt, 8-1/4 Imp qt)

Drain plug:
Tightening Torque: 29 - 39 N.M (3.0 - 4.0 kg-m, 22 - 29 ft-lb)

4. Run engine at idle speed for 5 minutes.
5. Check fluid level and condition. Refer to "Checking A/T Fluid". If fluid is still dirty, repeat steps 2 through 5.

Keep us updated with your results.

Roy