318 swap to a 401?? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 02-06-2006, 08:02 PM
New Member
Last photo:
Join Date: Jun 2002
Location: Redmond ,Oregon
Age: 75
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
318 swap to a 401??

I am not a mopar person, but my son is, his question to me is will a 401 jeep(amc) bolt up to a 1973 dodge 727 trannie, his 1973 dodge dart 6 pack,
had a 340 in it he put in a 318 , now has a chance to get a 401 the guy who has it says all stuff will bolt up, any thoughts. Thanks

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 02-06-2006, 09:21 PM
97Z28's Avatar
NTI Grad.
Last photo:
Join Date: Jul 2005
Location: Chardon, Ohio
Age: 35
Posts: 607
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
For all intents and purposes it should bolt right up. dont quote me on it, im not 100% sure. but it should.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-07-2006, 06:59 AM
farna's Avatar
Last wiki edit: AMC V-8s Last photo:
Join Date: Sep 2002
Location: Batesburg-Leesville, SC
Age: 55
Posts: 1,720
Wiki Edits: 14

Thanks: 0
Thanked 26 Times in 24 Posts

AMC DID use a 727 transmission from 72-78 in cars behind the AMC 360 and 401, and in the Jeep full size Wagoneers from 1980-91. The GM TH-400 was used in Jeeps only from 65-79. 65-68 was behind an AMC 327 (yes, AMC, not Chevy!) with an adapter (Buick Nailhead bell pattern, also sold as a "universal" by GM as the bell was ~2" shorter and easily used with an adapter), 69-70 behind a Buick 350 (with BOP pattern), and then 71 and later behind the AMC V-8s (AMC bought Jeep in 1970). 71-73 engines used an adapter and the "universal" TH-400 case. In 74 AMC was building enough Jeeps that they had GM cast special cases for them (some late 73s may have these also). GM may have discontinued the universal case at that time, not really sure.

Internally, the AMC and Chrysler 727s are identical in every way. The AMC version uses an AMC specific case with the AMC bell housing bolt pattern though. So you'll need an AMC case to put the 401 in your Chrysler. The big Jeeps only came with 4WD versions, but you can use the parts from any 2WD version (Chrysler or AMC) to convert one to 2WD. The driveshaft yoke from a Chrysler will fit also.

You're also going to have to check on the engine mounts. I'm sure they won't just drop right in, but they may be close. Likely just slotting or drilling new holes will fix that.

To be honest, you're probably better off finding a Chrysler engine and selling the 401 to an AMC performance guy. They are in pretty big demand by AMC people, but not necessarily Jeepers. Jeep guys just want to climb rocks for the most part, and don't mind swapping in cheaper to build when they brake them Chevys. AMC car guys are a different story! Post that ting for sale in the AMC section of e-pages.com or e-bay and it should go pretty fast. Check completed auctions on e-bay to see what they typically go for. A lot more than most Chrysler engines! I have to admit, an AMC powered Chrysler does have a certain ring to it, but then I'm an AMC guy!!
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-15-2006, 08:32 PM
Jeep's speed
Join Date: Oct 2005
Location: Cartersville,GA
Age: 35
Posts: 66
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Yeah that does have a certain ring to it then you get to see the look on the guy's face when he find's out that it was a AMC / chrysler hybrid that just waxed his chevy
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ideas for a Buick 401 Nailhead ckucia Engine 5 05-20-2005 09:51 AM
Found this site looking for swap info Roadrod Introduce Yourself 1 11-07-2004 10:16 AM
Swapping 273(or 318) to a 340/360 in Mopar A-body Gilligan Engine 7 09-18-2004 09:42 AM
cruisomatic to E4OD swap?? flamedfordbronco Transmission - Rearend 8 09-07-2004 06:56 PM

All times are GMT -6. The time now is 04:57 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.