diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/FullscreenTaskListener.java b/libs/WindowManager/Shell/src/com/android/wm/shell/FullscreenTaskListener.java
index 9047b71253dad..b275331fa9539 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/FullscreenTaskListener.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/FullscreenTaskListener.java
@@ -22,18 +22,18 @@ import android.util.Slog;
 import android.view.SurfaceControl;
 
 import com.android.internal.protolog.common.ProtoLog;
-import com.android.wm.shell.common.TransactionPool;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.protolog.ShellProtoLogGroup;
 
 class FullscreenTaskListener implements ShellTaskOrganizer.TaskListener {
     private static final String TAG = "FullscreenTaskOrg";
 
-    private final TransactionPool mTransactionPool;
+    private final SyncTransactionQueue mSyncQueue;
 
     private final ArraySet<Integer> mTasks = new ArraySet<>();
 
-    FullscreenTaskListener(TransactionPool transactionPool) {
-        mTransactionPool = transactionPool;
+    FullscreenTaskListener(SyncTransactionQueue syncQueue) {
+        mSyncQueue = syncQueue;
     }
 
     @Override
@@ -42,18 +42,18 @@ class FullscreenTaskListener implements ShellTaskOrganizer.TaskListener {
             if (mTasks.contains(taskInfo.taskId)) {
                 throw new RuntimeException("Task appeared more than once: #" + taskInfo.taskId);
             }
-            mTasks.add(taskInfo.taskId);
-            final SurfaceControl.Transaction t = mTransactionPool.acquire();
             ProtoLog.v(ShellProtoLogGroup.WM_SHELL_TASK_ORG, "Fullscreen Task Appeared: #%d",
                     taskInfo.taskId);
-            // Reset several properties back to fullscreen (PiP, for example, leaves all these
-            // properties in a bad state).
-            t.setPosition(leash, 0, 0);
-            t.setWindowCrop(leash, null);
-            t.setAlpha(leash, 1f);
-            t.setMatrix(leash, 1, 0, 0, 1);
-            t.show(leash);
-            t.apply();
+            mTasks.add(taskInfo.taskId);
+            mSyncQueue.runInSync(t -> {
+                // Reset several properties back to fullscreen (PiP, for example, leaves all these
+                // properties in a bad state).
+                t.setPosition(leash, 0, 0);
+                t.setWindowCrop(leash, null);
+                t.setAlpha(leash, 1f);
+                t.setMatrix(leash, 1, 0, 0, 1);
+                t.show(leash);
+            });
         }
     }
 
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
index 2d82fb1d3a212..d650a958a2036 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
@@ -28,7 +28,7 @@ import android.window.TaskOrganizer;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.protolog.common.ProtoLog;
-import com.android.wm.shell.common.TransactionPool;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.protolog.ShellProtoLogGroup;
 
 import java.util.ArrayList;
@@ -59,16 +59,16 @@ public class ShellTaskOrganizer extends TaskOrganizer {
     // require us to report to both old and new listeners)
     private final SparseArray<Pair<RunningTaskInfo, SurfaceControl>> mTasks = new SparseArray<>();
 
-    public ShellTaskOrganizer(TransactionPool transactionPool) {
+    public ShellTaskOrganizer(SyncTransactionQueue syncQueue) {
         super();
-        addListener(new FullscreenTaskListener(transactionPool), WINDOWING_MODE_FULLSCREEN);
+        addListener(new FullscreenTaskListener(syncQueue), WINDOWING_MODE_FULLSCREEN);
     }
 
     @VisibleForTesting
     ShellTaskOrganizer(ITaskOrganizerController taskOrganizerController,
-                       TransactionPool transactionPool) {
+                       SyncTransactionQueue syncQueue) {
         super(taskOrganizerController);
-        addListener(new FullscreenTaskListener(transactionPool), WINDOWING_MODE_FULLSCREEN);
+        addListener(new FullscreenTaskListener(syncQueue), WINDOWING_MODE_FULLSCREEN);
     }
 
     /**
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
index c8be93747f190..ce49dd9d1eb44 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
@@ -40,6 +40,7 @@ import com.android.wm.shell.common.DisplayChangeController;
 import com.android.wm.shell.common.DisplayController;
 import com.android.wm.shell.common.DisplayImeController;
 import com.android.wm.shell.common.DisplayLayout;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.common.SystemWindows;
 import com.android.wm.shell.common.TransactionPool;
 
@@ -99,7 +100,7 @@ public class SplitScreenController implements SplitScreen,
     public SplitScreenController(Context context,
             DisplayController displayController, SystemWindows systemWindows,
             DisplayImeController imeController, Handler handler, TransactionPool transactionPool,
-            ShellTaskOrganizer shellTaskOrganizer) {
+            ShellTaskOrganizer shellTaskOrganizer, SyncTransactionQueue syncQueue) {
         mContext = context;
         mDisplayController = displayController;
         mSystemWindows = systemWindows;
@@ -107,8 +108,7 @@ public class SplitScreenController implements SplitScreen,
         mHandler = handler;
         mForcedResizableController = new ForcedResizableInfoActivityController(context, this);
         mTransactionPool = transactionPool;
-        mWindowManagerProxy = new WindowManagerProxy(mTransactionPool, mHandler,
-                shellTaskOrganizer);
+        mWindowManagerProxy = new WindowManagerProxy(syncQueue, shellTaskOrganizer);
         mTaskOrganizer = shellTaskOrganizer;
         mSplits = new SplitScreenTaskOrganizer(this, shellTaskOrganizer);
         mImePositionProcessor = new DividerImeController(mSplits, mTransactionPool, mHandler,
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/WindowManagerProxy.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/WindowManagerProxy.java
index 25827cdb9e248..47e7c99d22681 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/WindowManagerProxy.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/WindowManagerProxy.java
@@ -28,7 +28,6 @@ import android.annotation.NonNull;
 import android.app.ActivityManager;
 import android.app.ActivityTaskManager;
 import android.graphics.Rect;
-import android.os.Handler;
 import android.os.RemoteException;
 import android.util.Log;
 import android.view.Display;
@@ -41,7 +40,6 @@ import android.window.WindowOrganizer;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.wm.shell.common.SyncTransactionQueue;
-import com.android.wm.shell.common.TransactionPool;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -85,9 +83,8 @@ class WindowManagerProxy {
 
     private final TaskOrganizer mTaskOrganizer;
 
-    WindowManagerProxy(TransactionPool transactionPool, Handler handler,
-            TaskOrganizer taskOrganizer) {
-        mSyncTransactionQueue = new SyncTransactionQueue(transactionPool, handler);
+    WindowManagerProxy(SyncTransactionQueue syncQueue, TaskOrganizer taskOrganizer) {
+        mSyncTransactionQueue = syncQueue;
         mTaskOrganizer = taskOrganizer;
     }
 
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/ShellTaskOrganizerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/ShellTaskOrganizerTests.java
index 7b499d4d6e7d3..823e0b7f03c55 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/ShellTaskOrganizerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/ShellTaskOrganizerTests.java
@@ -33,7 +33,7 @@ import android.window.ITaskOrganizerController;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SmallTest;
 
-import com.android.wm.shell.common.TransactionPool;
+import com.android.wm.shell.common.SyncTransactionQueue;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -54,7 +54,7 @@ public class ShellTaskOrganizerTests {
     private ITaskOrganizerController mTaskOrganizerController;
 
     ShellTaskOrganizer mOrganizer;
-    private final TransactionPool mTransactionPool = mock(TransactionPool.class);
+    private final SyncTransactionQueue mSyncTransactionQueue = mock(SyncTransactionQueue.class);
 
     private class TrackingTaskListener implements ShellTaskOrganizer.TaskListener {
         final ArrayList<RunningTaskInfo> appeared = new ArrayList<>();
@@ -85,7 +85,7 @@ public class ShellTaskOrganizerTests {
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
-        mOrganizer = new ShellTaskOrganizer(mTaskOrganizerController, mTransactionPool);
+        mOrganizer = new ShellTaskOrganizer(mTaskOrganizerController, mSyncTransactionQueue);
     }
 
     @Test
diff --git a/packages/SystemUI/src/com/android/systemui/wmshell/TvWMShellModule.java b/packages/SystemUI/src/com/android/systemui/wmshell/TvWMShellModule.java
index d6595b2323bf1..a50de45e547b4 100644
--- a/packages/SystemUI/src/com/android/systemui/wmshell/TvWMShellModule.java
+++ b/packages/SystemUI/src/com/android/systemui/wmshell/TvWMShellModule.java
@@ -26,6 +26,7 @@ import com.android.systemui.pip.tv.dagger.TvPipModule;
 import com.android.wm.shell.ShellTaskOrganizer;
 import com.android.wm.shell.common.DisplayController;
 import com.android.wm.shell.common.DisplayImeController;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.common.SystemWindows;
 import com.android.wm.shell.common.TransactionPool;
 import com.android.wm.shell.splitscreen.SplitScreen;
@@ -52,8 +53,9 @@ public class TvWMShellModule {
     static SplitScreen provideSplitScreen(Context context,
             DisplayController displayController, SystemWindows systemWindows,
             DisplayImeController displayImeController, @Main Handler handler,
-            TransactionPool transactionPool, ShellTaskOrganizer shellTaskOrganizer) {
+            TransactionPool transactionPool, ShellTaskOrganizer shellTaskOrganizer,
+            SyncTransactionQueue syncQueue) {
         return new SplitScreenController(context, displayController, systemWindows,
-                displayImeController, handler, transactionPool, shellTaskOrganizer);
+                displayImeController, handler, transactionPool, shellTaskOrganizer, syncQueue);
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
index bf9df8e2f89eb..dfb30b4652b95 100644
--- a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
+++ b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellBaseModule.java
@@ -39,6 +39,7 @@ import com.android.systemui.util.FloatingContentCoordinator;
 import com.android.wm.shell.ShellTaskOrganizer;
 import com.android.wm.shell.animation.FlingAnimationUtils;
 import com.android.wm.shell.common.DisplayController;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.common.SystemWindows;
 import com.android.wm.shell.common.TransactionPool;
 import com.android.wm.shell.onehanded.OneHanded;
@@ -123,8 +124,15 @@ public abstract class WMShellBaseModule {
 
     @SysUISingleton
     @Provides
-    static ShellTaskOrganizer provideShellTaskOrganizer(TransactionPool transactionPool) {
-        ShellTaskOrganizer organizer = new ShellTaskOrganizer(transactionPool);
+    static SyncTransactionQueue provideSyncTransactionQueue(@Main Handler handler,
+            TransactionPool pool) {
+        return new SyncTransactionQueue(pool, handler);
+    }
+
+    @SysUISingleton
+    @Provides
+    static ShellTaskOrganizer provideShellTaskOrganizer(SyncTransactionQueue syncQueue) {
+        ShellTaskOrganizer organizer = new ShellTaskOrganizer(syncQueue);
         organizer.registerOrganizer();
         return organizer;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellModule.java b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellModule.java
index 6ed836c3b9545..3142c1e762e90 100644
--- a/packages/SystemUI/src/com/android/systemui/wmshell/WMShellModule.java
+++ b/packages/SystemUI/src/com/android/systemui/wmshell/WMShellModule.java
@@ -36,6 +36,7 @@ import com.android.systemui.util.FloatingContentCoordinator;
 import com.android.wm.shell.ShellTaskOrganizer;
 import com.android.wm.shell.common.DisplayController;
 import com.android.wm.shell.common.DisplayImeController;
+import com.android.wm.shell.common.SyncTransactionQueue;
 import com.android.wm.shell.common.SystemWindows;
 import com.android.wm.shell.common.TransactionPool;
 import com.android.wm.shell.onehanded.OneHanded;
@@ -84,9 +85,10 @@ public class WMShellModule {
     static SplitScreen provideSplitScreen(Context context,
             DisplayController displayController, SystemWindows systemWindows,
             DisplayImeController displayImeController, @Main Handler handler,
-            TransactionPool transactionPool, ShellTaskOrganizer shellTaskOrganizer) {
+            TransactionPool transactionPool, ShellTaskOrganizer shellTaskOrganizer,
+            SyncTransactionQueue syncQueue) {
         return new SplitScreenController(context, displayController, systemWindows,
-                displayImeController, handler, transactionPool, shellTaskOrganizer);
+                displayImeController, handler, transactionPool, shellTaskOrganizer, syncQueue);
     }
 
     @SysUISingleton