Does it sound like the motor is running during the spin cycle?
If the motor runs during the spin cycle, but the tub does not spin I would ohm out the solenoids on the wig wag.
The wig wag is #9 in the diagram I attached at the bottom. You will have to pull the washer out and take the back panel off to see it.
Whirlpool Washer Wig Wag Part # 84867
Another thing to check is the wire harness that goes to the wig wag. Check right were it goes into the center hole. The wires move a lot there and often break inside. You may not be able to see that it is broken, but maybe able to feel it or see it on the meter.