quick transmission swap question - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 05-17-2013, 12:08 PM Thread Starter
iluvcowjuice
Registered User
1979 CJ7 
 
Join Date: May 2010
Location: Olney, MD
Posts: 515
quick transmission swap question

I'm getting a 360 that was mated to a 727 auto transmission. I have a 304 now with a t176 Dana 300 combo ready to go on it. Do I need a new fly wheel on the motor or will everything bolt up?

iluvcowjuice is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 05-17-2013, 12:21 PM
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert
Posts: 16,756
AMC V8s are externally balanced, meaning each displacement size has it's own specific flywheel and balancer. They don't interchange.

The manual and auto flywheels are also different.

So, the answer is, yes, you will need a new flywheel for the 360/T18 combo.

Matt
Matt1981CJ7 is offline  
post #3 of 8 Old 05-17-2013, 12:28 PM Thread Starter
iluvcowjuice
Registered User
1979 CJ7 
 
Join Date: May 2010
Location: Olney, MD
Posts: 515
Awesome, thank you.
iluvcowjuice is offline  
post #4 of 8 Old 05-17-2013, 12:32 PM
78FordF150
Registered User
1983 CJ7 
 
Join Date: Jul 2010
Location: Arkansas City
Posts: 838
I will add to what Matt said just to clarify. You need a AMC 360 specific flywheel and harmonic dampner for a manual transmission that is for a 360.
You can not use the dampner from a automatic transmission.

Measure with a Micrometer
Cutter with an ax
Beat it to fit
Paint it to match


My NP435 install http://www.jeepforum.com/forum/f8/ti...np435-1487201/
78FordF150 is offline  
post #5 of 8 Old 05-17-2013, 12:37 PM Thread Starter
iluvcowjuice
Registered User
1979 CJ7 
 
Join Date: May 2010
Location: Olney, MD
Posts: 515
Ok. Does the dampner mount to the front or back, and is it something I can get at a parts store?
iluvcowjuice is offline  
post #6 of 8 Old 05-17-2013, 12:49 PM
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 15,602
Wait, what?

I've been down this road before (a few times) and I've NEVER heard of a transmission type specific harmonic balancer. Sorry, but I'm not buying that one.

The flywheel and harmonic balancer (dampner) balance the engine's rotating assembly, not the transmission's.

The flywheel only has to change because an auto uses a flexplate, not a flywheel and a clutch isn't compatible with a flexplate. It has nothing to do with balancing.
CSP is offline  
post #7 of 8 Old 05-17-2013, 12:52 PM
78FordF150
Registered User
1983 CJ7 
 
Join Date: Jul 2010
Location: Arkansas City
Posts: 838
Mounts to the front of the crankshaft. It is what your lower center pulley on the front of the engine bolts to.
You might be able to get one locally. Just have to try.
Have them look up a 78 jeep j10 truck with manual transmission.

Measure with a Micrometer
Cutter with an ax
Beat it to fit
Paint it to match


My NP435 install http://www.jeepforum.com/forum/f8/ti...np435-1487201/
78FordF150 is offline  
post #8 of 8 Old 05-17-2013, 01:39 PM
78FordF150
Registered User
1983 CJ7 
 
Join Date: Jul 2010
Location: Arkansas City
Posts: 838
My first 360 swap I did years ago, (came out of a Cherokee with automatic) had a slight vibration from idle on up into the rpm range. One of the old guy's at the time that worked at the jeep dealership told me it was because the dampner was for a automatic transmission. We went to the parts department and they listed one for each transmission. So I ordered one for a manual tranny and it curred my vibrations. The one I took off and the new were visibly different.

I just looked online and can't find one listed specifically for a certain tranny. Just going by past experience.

Measure with a Micrometer
Cutter with an ax
Beat it to fit
Paint it to match


My NP435 install http://www.jeepforum.com/forum/f8/ti...np435-1487201/
78FordF150 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









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
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome