diff --git a/src/runtime/components/overlays/Modal.vue b/src/runtime/components/overlays/Modal.vue
index 16c23df3..4640c1d3 100644
--- a/src/runtime/components/overlays/Modal.vue
+++ b/src/runtime/components/overlays/Modal.vue
@@ -7,7 +7,7 @@
         :appear="appear"
         v-bind="overlayTransition"
       >
-        <div class="fixed inset-0 transition-opacity" :class="overlayClass" />
+        <div class="fixed inset-0 transition-opacity" :class="overlayBackgroundClass" />
       </TransitionChild>
 
       <div :class="wrapperClass">
@@ -78,9 +78,13 @@ const props = defineProps({
     type: Boolean,
     default: true
   },
-  overlayClass: {
+  overlayBackgroundClass: {
     type: String,
-    default: () => $ui.modal.overlay
+    default: () => $ui.modal.overlay.background
+  },
+  overlayTransitionClass: {
+    type: Object,
+    default: () => $ui.modal.overlay.transition
   },
   shadowClass: {
     type: String,
@@ -101,6 +105,10 @@ const props = defineProps({
   transition: {
     type: Boolean,
     default: true
+  },
+  transitionClass: {
+    type: Object,
+    default: () => $ui.modal.transition
   }
 })
 
@@ -131,14 +139,7 @@ const overlayTransition = computed(() => {
     return {}
   }
 
-  return {
-    enter: 'ease-out duration-300',
-    enterFrom: 'opacity-0',
-    enterTo: 'opacity-100',
-    leave: 'ease-in duration-200',
-    leaveFrom: 'opacity-100',
-    leaveTo: 'opacity-0'
-  }
+  return props.overlayTransitionClass
 })
 
 const modalTransition = computed(() => {
@@ -146,14 +147,7 @@ const modalTransition = computed(() => {
     return {}
   }
 
-  return {
-    enter: 'ease-out duration-300',
-    enterFrom: 'opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95',
-    enterTo: 'opacity-100 translate-y-0 sm:scale-100',
-    leave: 'ease-in duration-200',
-    leaveFrom: 'opacity-100 translate-y-0 sm:scale-100',
-    leaveTo: 'opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95'
-  }
+  return props.transitionClass
 })
 
 function close (value: boolean) {
diff --git a/src/runtime/components/overlays/Slideover.vue b/src/runtime/components/overlays/Slideover.vue
index d2bfdaa3..124d7ee8 100644
--- a/src/runtime/components/overlays/Slideover.vue
+++ b/src/runtime/components/overlays/Slideover.vue
@@ -8,25 +8,20 @@
       @close="isOpen = false"
     >
       <TransitionChild
+        v-if="overlay"
         as="template"
-        enter="transition-opacity ease-linear duration-300"
-        enter-from="opacity-0"
-        enter-to="opacity-100"
-        leave="transition-opacity ease-linear duration-300"
-        leave-from="opacity-100"
-        leave-to="opacity-0"
+        v-bind="overlayTransitionClass"
       >
-        <div class="fixed inset-0 transition-opacity" :class="overlayClass" />
+        <div class="fixed inset-0 transition-opacity" :class="overlayBackgroundClass" />
       </TransitionChild>
 
       <TransitionChild
         as="template"
-        enter="transition ease-in-out duration-300 transform"
         :enter-from="side === 'left' ? '-translate-x-full' : 'translate-x-full'"
         enter-to="translate-x-0"
-        leave="transition ease-in-out duration-300 transform"
         leave-from="translate-x-0"
         :leave-to="side === 'left' ? '-translate-x-full' : 'translate-x-full'"
+        v-bind="transitionClass"
       >
         <DialogPanel :class="slideoverClass">
           <div v-if="$slots.header" :class="headerClass">
@@ -64,9 +59,17 @@ const props = defineProps({
     type: String,
     default: () => $ui.slideover.background
   },
-  overlayClass: {
+  overlay: {
+    type: Boolean,
+    default: true
+  },
+  overlayBackgroundClass: {
     type: String,
-    default: () => $ui.slideover.overlay
+    default: () => $ui.slideover.overlay.background
+  },
+  overlayTransitionClass: {
+    type: Object,
+    default: () => $ui.slideover.overlay.transition
   },
   widthClass: {
     type: String,
@@ -75,8 +78,13 @@ const props = defineProps({
   headerClass: {
     type: String,
     default: () => $ui.slideover.header
+  },
+  transitionClass: {
+    type: Object,
+    default: () => $ui.slideover.transition
   }
 })
+
 const emit = defineEmits(['update:modelValue'])
 
 const isOpen: WritableComputedRef<boolean> = computed({
diff --git a/src/runtime/presets/default.ts b/src/runtime/presets/default.ts
index 910a304c..357118b7 100644
--- a/src/runtime/presets/default.ts
+++ b/src/runtime/presets/default.ts
@@ -253,12 +253,30 @@ export default (variantColors: string[]) => {
     container: 'flex min-h-full items-end sm:items-center justify-center p-4 sm:p-0 text-center',
     base: 'relative inline-block align-bottom text-left overflow-hidden transform transition-all sm:my-8 sm:align-middle w-full',
     background: 'u-bg-white',
-    overlay: 'bg-gray-500/75 dark:bg-gray-600/75',
+    overlay: {
+      background: 'bg-gray-500/75 dark:bg-gray-600/75',
+      transition: {
+        enter: 'ease-out duration-300',
+        enterFrom: 'opacity-0',
+        enterTo: 'opacity-100',
+        leave: 'ease-in duration-200',
+        leaveFrom: 'opacity-100',
+        leaveTo: 'opacity-0'
+      }
+    },
     border: '',
     ring: '',
     rounded: 'rounded-lg',
     shadow: 'shadow-xl',
-    width: 'sm:max-w-lg'
+    width: 'sm:max-w-lg',
+    transition: {
+      enter: 'ease-out duration-300',
+      enterFrom: 'opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95',
+      enterTo: 'opacity-100 translate-y-0 sm:scale-100',
+      leave: 'ease-in duration-200',
+      leaveFrom: 'opacity-100 translate-y-0 sm:scale-100',
+      leaveTo: 'opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95'
+    }
   }
 
   const container = {
@@ -402,11 +420,25 @@ export default (variantColors: string[]) => {
   }
 
   const slideover = {
-    overlay: 'bg-gray-500/75 dark:bg-gray-600/75',
+    overlay: {
+      background: 'bg-gray-500/75 dark:bg-gray-600/75',
+      transition: {
+        enter: 'ease-in-out duration-500',
+        enterFrom: 'opacity-0',
+        enterTo: 'opacity-100',
+        leave: 'ease-in-out duration-500',
+        leaveFrom: 'opacity-100',
+        leaveTo: 'opacity-0'
+      }
+    },
     base: 'relative flex-1 flex flex-col w-full focus:outline-none',
     background: 'u-bg-white',
     width: 'max-w-md',
-    header: 'flex items-center justify-between flex-shrink-0 px-4 sm:px-6 h-16 border-b u-border-gray-200'
+    header: 'flex items-center justify-between flex-shrink-0 px-4 sm:px-6 h-16 border-b u-border-gray-200',
+    transition: {
+      enter: 'transform transition ease-in-out duration-500 sm:duration-700',
+      leave: 'transform transition ease-in-out duration-500 sm:duration-700'
+    }
   }
 
   const notification = {