diff --git a/actionmailer/CHANGELOG b/actionmailer/CHANGELOG
index bf23f7b4dd..1a25b310b9 100644
--- a/actionmailer/CHANGELOG
+++ b/actionmailer/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.] 
+
 * Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
 
 * Correct spurious documentation example code which results in a SyntaxError. [Marcel Molina Jr.]
diff --git a/actionmailer/lib/action_mailer/helpers.rb b/actionmailer/lib/action_mailer/helpers.rb
index ee7523a507..8176ba8a9a 100644
--- a/actionmailer/lib/action_mailer/helpers.rb
+++ b/actionmailer/lib/action_mailer/helpers.rb
@@ -11,14 +11,12 @@ def self.included(base) #:nodoc:
       base.class_eval do
         # Wrap inherited to create a new master helper module for subclasses.
         class << self
-          alias_method :inherited_without_helper, :inherited
-          alias_method :inherited, :inherited_with_helper
+          alias_method_chain :inherited, :helper
         end
 
         # Wrap initialize_template_class to extend new template class
         # instances with the master helper module.
-        alias_method :initialize_template_class_without_helper, :initialize_template_class
-        alias_method :initialize_template_class, :initialize_template_class_with_helper
+        alias_method_chain :initialize_template_class, :helper
       end
     end
 
diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index 865aec8672..1d28af1c3d 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
+
 * Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
 
 * Use #flush between switching from #write to #syswrite. Closes #4907. [Blair Zajac <blair@orcaware.com>]
diff --git a/actionpack/lib/action_controller/benchmarking.rb b/actionpack/lib/action_controller/benchmarking.rb
index a30212c8bd..8b548f9d25 100644
--- a/actionpack/lib/action_controller/benchmarking.rb
+++ b/actionpack/lib/action_controller/benchmarking.rb
@@ -8,11 +8,8 @@ def self.included(base)
       base.extend(ClassMethods)
 
       base.class_eval do
-        alias_method :perform_action_without_benchmark, :perform_action
-        alias_method :perform_action, :perform_action_with_benchmark
-
-        alias_method :render_without_benchmark, :render
-        alias_method :render, :render_with_benchmark
+        alias_method_chain :perform_action, :benchmark
+        alias_method_chain :render, :benchmark
       end
     end
 
diff --git a/actionpack/lib/action_controller/components.rb b/actionpack/lib/action_controller/components.rb
index 75005daaec..c746928697 100644
--- a/actionpack/lib/action_controller/components.rb
+++ b/actionpack/lib/action_controller/components.rb
@@ -50,14 +50,9 @@ def render_component(options)
       base.send :attr_accessor, :parent_controller
       
       base.class_eval do
-        alias_method :process_cleanup_without_components, :process_cleanup
-        alias_method :process_cleanup, :process_cleanup_with_components
-        
-        alias_method :set_session_options_without_components, :set_session_options
-        alias_method :set_session_options, :set_session_options_with_components
-        
-        alias_method :flash_without_components, :flash
-        alias_method :flash, :flash_with_components
+        alias_method_chain :process_cleanup, :components
+        alias_method_chain :set_session_options, :components
+        alias_method_chain :flash, :components
 
         alias_method :component_request?, :parent_controller       
       end
diff --git a/actionpack/lib/action_controller/filters.rb b/actionpack/lib/action_controller/filters.rb
index 01a4b9fba1..624124ac01 100644
--- a/actionpack/lib/action_controller/filters.rb
+++ b/actionpack/lib/action_controller/filters.rb
@@ -350,14 +350,9 @@ def remove_contradicting_conditions!(filters, conditions)
     module InstanceMethods # :nodoc:
       def self.included(base)
         base.class_eval do
-          alias_method :perform_action_without_filters, :perform_action
-          alias_method :perform_action, :perform_action_with_filters
-
-          alias_method :process_without_filters, :process
-          alias_method :process, :process_with_filters
-
-          alias_method :process_cleanup_without_filters, :process_cleanup
-          alias_method :process_cleanup, :process_cleanup_with_filters
+          alias_method_chain :perform_action, :filters
+          alias_method_chain :process, :filters
+          alias_method_chain :process_cleanup, :filters
         end
       end
 
diff --git a/actionpack/lib/action_controller/flash.rb b/actionpack/lib/action_controller/flash.rb
index 8877c33741..61ac33f399 100644
--- a/actionpack/lib/action_controller/flash.rb
+++ b/actionpack/lib/action_controller/flash.rb
@@ -28,11 +28,8 @@ def self.included(base)
       base.send :include, InstanceMethods
 
       base.class_eval do
-        alias_method :assign_shortcuts_without_flash, :assign_shortcuts
-        alias_method :assign_shortcuts, :assign_shortcuts_with_flash
-
-        alias_method :process_cleanup_without_flash, :process_cleanup
-        alias_method :process_cleanup, :process_cleanup_with_flash
+        alias_method_chain :assign_shortcuts, :flash
+        alias_method_chain :process_cleanup, :flash
       end
     end
     
diff --git a/actionpack/lib/action_controller/helpers.rb b/actionpack/lib/action_controller/helpers.rb
index cdfcfd7e91..8aeef52868 100644
--- a/actionpack/lib/action_controller/helpers.rb
+++ b/actionpack/lib/action_controller/helpers.rb
@@ -12,8 +12,7 @@ def self.included(base)
       base.class_eval do
         # Wrap inherited to create a new master helper module for subclasses.
         class << self
-          alias_method :inherited_without_helper, :inherited
-          alias_method :inherited, :inherited_with_helper
+          alias_method_chain :inherited, :helper
         end
       end
     end
diff --git a/actionpack/lib/action_controller/integration.rb b/actionpack/lib/action_controller/integration.rb
index 74817c4b4c..56ac4b74fe 100644
--- a/actionpack/lib/action_controller/integration.rb
+++ b/actionpack/lib/action_controller/integration.rb
@@ -317,9 +317,8 @@ module ControllerCapture #:nodoc:
       def self.included(base)
         base.extend(ClassMethods)
         base.class_eval do
-          class <<self
-            alias_method :new_without_capture, :new
-            alias_method :new, :new_with_capture
+          class << self
+            alias_method_chain :new, :capture
           end
         end
       end
diff --git a/actionpack/lib/action_controller/layout.rb b/actionpack/lib/action_controller/layout.rb
index 4e9e42d468..f27e42ea17 100644
--- a/actionpack/lib/action_controller/layout.rb
+++ b/actionpack/lib/action_controller/layout.rb
@@ -3,12 +3,13 @@ module Layout #:nodoc:
     def self.included(base)
       base.extend(ClassMethods)
       base.class_eval do
+        # NOTE: Can't use alias_method_chain here because +render_without_layout+ is already
+        # defined as a publicly exposed method
         alias_method :render_with_no_layout, :render
         alias_method :render, :render_with_a_layout
 
         class << self
-          alias_method :inherited_without_layout, :inherited
-          alias_method :inherited, :inherited_with_layout
+          alias_method_chain :inherited, :layout
         end
       end
     end
diff --git a/actionpack/lib/action_controller/rescue.rb b/actionpack/lib/action_controller/rescue.rb
index 9f0cd47092..9b57d35587 100644
--- a/actionpack/lib/action_controller/rescue.rb
+++ b/actionpack/lib/action_controller/rescue.rb
@@ -9,8 +9,7 @@ module Rescue
     def self.included(base) #:nodoc:
       base.extend(ClassMethods)
       base.class_eval do
-        alias_method :perform_action_without_rescue, :perform_action
-        alias_method :perform_action, :perform_action_with_rescue
+        alias_method_chain :perform_action, :rescue
       end
     end
 
diff --git a/actionpack/lib/action_controller/session_management.rb b/actionpack/lib/action_controller/session_management.rb
index 408ef2790e..d953b5b766 100644
--- a/actionpack/lib/action_controller/session_management.rb
+++ b/actionpack/lib/action_controller/session_management.rb
@@ -8,12 +8,9 @@ module ActionController #:nodoc:
   module SessionManagement #:nodoc:
     def self.included(base)
       base.extend(ClassMethods)
-
-      base.send :alias_method, :process_without_session_management_support, :process
-      base.send :alias_method, :process, :process_with_session_management_support
-
-      base.send :alias_method, :process_cleanup_without_session_management_support, :process_cleanup
-      base.send :alias_method, :process_cleanup, :process_cleanup_with_session_management_support
+      
+      base.send :alias_method_chain, :process, :session_management_support
+      base.send :alias_method_chain, :process_cleanup, :session_management_support
     end
 
     module ClassMethods
diff --git a/actionpack/lib/action_controller/test_process.rb b/actionpack/lib/action_controller/test_process.rb
index 096ccf76d2..b35439249d 100644
--- a/actionpack/lib/action_controller/test_process.rb
+++ b/actionpack/lib/action_controller/test_process.rb
@@ -18,8 +18,7 @@ def process_with_test(*args)
       end
     end
 
-    alias_method :process_without_test, :process
-    alias_method :process, :process_with_test
+    alias_method_chain :process, :test
   end
 
   class TestRequest < AbstractRequest #:nodoc:
diff --git a/actionwebservice/CHANGELOG b/actionwebservice/CHANGELOG
index c84787ef75..22bdd328aa 100644
--- a/actionwebservice/CHANGELOG
+++ b/actionwebservice/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
+
 * Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
 
 * Fix test database name typo. [Marcel Molina Jr.]
diff --git a/actionwebservice/lib/action_web_service/container/action_controller_container.rb b/actionwebservice/lib/action_web_service/container/action_controller_container.rb
index e96ee0692d..bbc28083c3 100644
--- a/actionwebservice/lib/action_web_service/container/action_controller_container.rb
+++ b/actionwebservice/lib/action_web_service/container/action_controller_container.rb
@@ -4,10 +4,8 @@ module ActionController # :nodoc:
       def self.included(base) # :nodoc:
         class << base
           include ClassMethods
-          alias_method :inherited_without_api, :inherited
-          alias_method :inherited, :inherited_with_api
-          alias_method :web_service_api_without_require, :web_service_api
-          alias_method :web_service_api, :web_service_api_with_require
+          alias_method_chain :inherited, :api
+          alias_method_chain :web_service_api, :require
         end
       end
 
diff --git a/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb b/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb
index f1fd6137f5..a338aedbc1 100644
--- a/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb
+++ b/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb
@@ -7,8 +7,7 @@ module ActionController # :nodoc:
       def self.included(base) # :nodoc:
         class << base
           include ClassMethods
-          alias_method :inherited_without_action_controller, :inherited
-          alias_method :inherited, :inherited_with_action_controller
+          alias_method_chain :inherited, :action_controller
         end
         base.class_eval do
           alias_method :web_service_direct_invoke_without_controller, :web_service_direct_invoke
diff --git a/actionwebservice/lib/action_web_service/invocation.rb b/actionwebservice/lib/action_web_service/invocation.rb
index c37e923fc7..2a9121ee26 100644
--- a/actionwebservice/lib/action_web_service/invocation.rb
+++ b/actionwebservice/lib/action_web_service/invocation.rb
@@ -126,8 +126,7 @@ def condition_hash(interceptors, *methods)
     module InstanceMethods # :nodoc:
       def self.included(base)
         base.class_eval do
-          alias_method :perform_invocation_without_interception, :perform_invocation
-          alias_method :perform_invocation, :perform_invocation_with_interception
+          alias_method_chain :perform_invocation, :interception
         end
       end
 
diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG
index 906f0a39db..79fdae8b20 100644
--- a/activerecord/CHANGELOG
+++ b/activerecord/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
+
 * Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
 
 * Remove duplicate fixture entry in comments.yml. Closes #4923. [Blair Zajac <blair@orcaware.com>]
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index 26d8bfa7b6..d219efe727 100755
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -175,27 +175,12 @@ def self.included(base) #:nodoc:
       base.class_eval do
         class << self
           include Observable
-          alias_method :instantiate_without_callbacks, :instantiate
-          alias_method :instantiate, :instantiate_with_callbacks
+          alias_method_chain :instantiate, :callbacks
         end
 
-        alias_method :initialize_without_callbacks, :initialize
-        alias_method :initialize, :initialize_with_callbacks
-
-        alias_method :create_or_update_without_callbacks, :create_or_update
-        alias_method :create_or_update, :create_or_update_with_callbacks
-
-        alias_method :valid_without_callbacks, :valid?
-        alias_method :valid?, :valid_with_callbacks
-
-        alias_method :create_without_callbacks, :create
-        alias_method :create, :create_with_callbacks
-
-        alias_method :update_without_callbacks, :update
-        alias_method :update, :update_with_callbacks
-
-        alias_method :destroy_without_callbacks, :destroy
-        alias_method :destroy, :destroy_with_callbacks
+        [:initialize, :create_or_update, :valid?, :create, :update, :destroy].each do |method|
+          alias_method_chain method, :callbacks
+        end
       end
 
       CALLBACKS.each do |method|
diff --git a/activerecord/lib/active_record/locking.rb b/activerecord/lib/active_record/locking.rb
index 3e0c47e706..ee4224c004 100644
--- a/activerecord/lib/active_record/locking.rb
+++ b/activerecord/lib/active_record/locking.rb
@@ -23,8 +23,7 @@ module ActiveRecord
   module Locking
     def self.included(base) #:nodoc:
       base.class_eval do
-        alias_method :update_without_lock, :update
-        alias_method :update, :update_with_lock
+        alias_method_chain :update, :lock
       end
     end
 
diff --git a/activerecord/lib/active_record/timestamp.rb b/activerecord/lib/active_record/timestamp.rb
index 44936a1432..26fb0c17ac 100644
--- a/activerecord/lib/active_record/timestamp.rb
+++ b/activerecord/lib/active_record/timestamp.rb
@@ -8,11 +8,9 @@ module ActiveRecord
   module Timestamp
     def self.included(base) # :nodoc:
       base.class_eval do
-        alias_method :create_without_timestamps, :create
-        alias_method :create, :create_with_timestamps
-
-        alias_method :update_without_timestamps, :update
-        alias_method :update, :update_with_timestamps
+        [:create, :update].each do |method|
+          alias_method_chain method, :timestamps
+        end
       end
     end
 
diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb
index 01bbdf4c8a..c222e18097 100644
--- a/activerecord/lib/active_record/transactions.rb
+++ b/activerecord/lib/active_record/transactions.rb
@@ -13,11 +13,9 @@ def self.included(base)
       base.extend(ClassMethods)
 
       base.class_eval do
-        alias_method :destroy_without_transactions, :destroy
-        alias_method :destroy, :destroy_with_transactions
-
-        alias_method :save_without_transactions, :save
-        alias_method :save, :save_with_transactions
+        [:destroy, :save].each do |method|
+          alias_method_chain method, :transactions
+        end
       end
     end
 
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index d66c5934fb..4194e68b2f 100755
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -217,14 +217,9 @@ module Validations
     def self.included(base) # :nodoc:
       base.extend ClassMethods
       base.class_eval do
-        alias_method :save_without_validation, :save
-        alias_method :save, :save_with_validation
-
-        alias_method :save_without_validation!, :save!
-        alias_method :save!, :save_with_validation!
-
-        alias_method :update_attribute_without_validation_skipping, :update_attribute
-        alias_method :update_attribute, :update_attribute_with_validation_skipping
+        alias_method_chain :save, :validation
+        alias_method_chain :save!, :validation!       
+        alias_method_chain :update_attribute, :validation_skipping
       end
     end
 
diff --git a/activesupport/CHANGELOG b/activesupport/CHANGELOG
index 7d20611df2..16052680da 100644
--- a/activesupport/CHANGELOG
+++ b/activesupport/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace alias method chaining with Module#alias_method_chain. [Marcel Molina Jr.]
+
 * Strip out punctuation on predicates or bang methods being aliased with alias_method_chain since target?_without_feature is not a valid method name. Add tests for Module#alias_method_chain. [Marcel Molina Jr.]
 
 * Replace Ruby's deprecated append_features in favor of included. [Marcel Molina Jr.]
diff --git a/activesupport/lib/active_support/core_ext/time/calculations.rb b/activesupport/lib/active_support/core_ext/time/calculations.rb
index 7c60d5bed5..8511a74d5c 100644
--- a/activesupport/lib/active_support/core_ext/time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/time/calculations.rb
@@ -3,8 +3,7 @@ module CoreExtensions #:nodoc:
     module Time #:nodoc:
       # Enables the use of time calculations within Time itself
       module Calculations
-        def self.append_features(base) #:nodoc:
-          super
+        def self.included(base) #:nodoc:
           base.extend(ClassMethods)
         end