Should transition.retry() cause willTransition to fire?

My app uses modals pretty heavily and I’ve been converting from routeless modals with controllers to routed modals where it makes sense. One thing I’m running into is when I close the modal the URL needs to update to the proper URL.

// List of all cars for a manufacturer
/manufacturers/1/cars

// View details of a specific car
/manufacturers/1/cars/3

If /manufacturers/1/cars/3 is open in a modal, closing that modal should transition me back to /manufacturers/1/cars I’m currently handling this by saving the transition in /manufacturers/:id and then retrying that transition on modal close.

App.ManufacturersManufacturerRoute = Ember.Route.extend({
   beforeModel(transition, queryParams) {
      this.controllerFor('application').set('previousTransition', transition);
   }
});

App.ManufacturersManufacturerCarsViewRoute = Ember.Route.extend({
   defaultTransitionRoute: 'manufacturers.manufacturer',

   willTransition: function(transition) {
      var self = this;
      // transition to the previous route
      // if the previous route is the same as the current route then redirect to a leaf route further up the tree
      var previousTransition = self.controllerFor('application').get('previousTransition');
      
      if (previousTransition.targetName === self.routeName) {
         // reset the transition to the immediately previous transition that has a param value
         var route = '', params = '';
         $.each(previousTransition.handlerInfos.reverse(), function(i, handler) {
            if (handler.name !== self.routeName) {
               var keys = Ember.keys(handler.params);
               if (keys.length > 0) {
                  route = handler.name;
                  params = handler.params[keys[0]];
                  return false;
               }
             }
          });
         if (!Ember.isEmpty(params)) {
             self.transitionTo(route, params);
         } else {
             self.transitionTo(self.get('defaultTransitionRoute'));
         }
      } else {
         previousTransition.retry();
   },

    actions: {
       closeModal: function () {
          this.disconnectOutlet({
              outlet: 'modal',
              parentView: 'application'
          });
          var previousTransition = this.controllerFor('application').get('previousTransition');
          return previousTransition.retry();
      }
   }
});

In the case where manufacturers\1\cars\3 is directly opened the previousTransition is the same as the current route. In this case I want to transition to the leaf-most route with a valid param (always the parent object route in my case). previousTransition.retry() in closeModal is being hit but the willTransition event is not firing as I would expect it to.

Is it better to have the willTransition logic in my closeModal method or is there a way to force willTransition to fire?