304 flywheel

I would find a shop that will match balance the found 304 flywheel to the current 304 flexplate. And you will need the flywheel to be correct for the year of your engine.

1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box

If you have not messed with the balance of the engine in the first place thus it now has original OEM balance, locating a new flywheel for a standard transmission that is correct for a 304 V8 should not require anything to rebalance the engine. It is a non issue.

But if you locate a flywheel for a 360 or some other displacement AMC V8 and purchase it, the thing can be rebalanced by machine shops that do those things to AMC 304 V8 specifications.

As to where one might be obtained, I would start with the auto supply shops including Rock Auto or aftermarket rebuilding shops or run a google search and see what comes up or even put a wanted request here on the forum. A flywheel from any 304 v8 should work for you.

Here is the first place on line where I would check

http://https://www.google.com/search?hl=en&source=hp&q=FLYWHEEL+AMC+304&gbv=2&oq=FLYWHEEL+AMC+304&gs_l=heirloom-hp.13..0i22i30l7.1625.12234.0.16156.16.13.0.3.3.0.203.2297.0j12j1.13.0.msedr...0...1ac.1.34.heirloom-hp..0.16.2438.kGMfr88Vk3A

Edited by uncljohn - Dec/18/2014 at 7:36am

70 390 5spd Donohue
74 Hornet In restoration
76 Hornet, 5.7L Mercury Marine Power
80 Fuel Injected I6 Spirit
74 232 I-6, 4bbl, 270HL Isky Cam

American part depot has a listing for new 304 flywheels! #910 5601C, Doug sells them for $195.00.

Dennis

Former Owner of:
The Craig Breedlove "AERO AMX"

Still Owner:
SS/AMX #9 replica (THE BIG MENACE)
70 AMX 416, EFI, Nash 5 speed
70 Javelin 401, 727 (Wife's car)
72 Gremlin Autocross Project.

Be real careful here, I got the heck bomb-blasted out of me for posting a photo of a 79 304 flywheel that came from the factory on a 79 Spirit AMX with the SR4 four speed manual. The later and last versions of the 304 may actually have a six cylinder flywheel that was fitted and drilled for Detroit balance. I know someday someone else is going to come forward and say the same thing.
just sayin,

Armand

70 Javelin SST, second owner, purchased 1972

I'll send you a PM on flywheel.

Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar)
68X,GoPac,390,4sp,52A
69X,GoPac,390,4sp,64A
70X,GoPac,390,4sp,87A,8
70X,GoPac,390,4sp,BBO,8
70 Jav SST,390,AT,BSO
74MatX,401,AT,Prototype
74MatX,401,AT

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Javelin69 Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Dec/11/2013 Location: Madison wi Status: Offline Points: 187	Post Options Post Reply Quote Javelin69 Report Post Thanks(0) Quote Reply Topic: 304 flywheel Posted: Dec/17/2014 at 11:57pm
	My son wants to convert his 304 auto to aT5. The way a 304 is balanced, how important is it (if at all) to have the motor/flywheel re-balanced after a correct flywheel is obtained? This leads to the next issue of finding a 304 flywheel, so any help there would be welcome.

1970390amx Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314	Post Options Post Reply Quote 1970390amx Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 12:04am
	I would find a shop that will match balance the found 304 flywheel to the current 304 flexplate. And you will need the flywheel to be correct for the year of your engine.
	1970 390 4speed Bittersweet shadow mask AMX 1970 Amx missing most everything, or in a box

Javelin69 Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Dec/11/2013 Location: Madison wi Status: Offline Points: 187	Post Options Post Reply Quote Javelin69 Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 7:17am
	I never thought of that if they could match the flywheel balance to the flexplate that should work. Anybody have any ideas where to obtain a flywheel?

uncljohn Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jan/03/2013 Location: Peoria AZ Status: Offline Points: 5394	Post Options Post Reply Quote uncljohn Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 7:31am
	If you have not messed with the balance of the engine in the first place thus it now has original OEM balance, locating a new flywheel for a standard transmission that is correct for a 304 V8 should not require anything to rebalance the engine. It is a non issue. But if you locate a flywheel for a 360 or some other displacement AMC V8 and purchase it, the thing can be rebalanced by machine shops that do those things to AMC 304 V8 specifications. As to where one might be obtained, I would start with the auto supply shops including Rock Auto or aftermarket rebuilding shops or run a google search and see what comes up or even put a wanted request here on the forum. A flywheel from any 304 v8 should work for you. Here is the first place on line where I would check http://https://www.google.com/search?hl=en&source=hp&q=FLYWHEEL+AMC+304&gbv=2&oq=FLYWHEEL+AMC+304&gs_l=heirloom-hp.13..0i22i30l7.1625.12234.0.16156.16.13.0.3.3.0.203.2297.0j12j1.13.0.msedr...0...1ac.1.34.heirloom-hp..0.16.2438.kGMfr88Vk3A Edited by uncljohn - Dec/18/2014 at 7:36am
	70 390 5spd Donohue 74 Hornet In restoration 76 Hornet, 5.7L Mercury Marine Power 80 Fuel Injected I6 Spirit 74 232 I-6, 4bbl, 270HL Isky Cam

farna Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19689	Post Options Post Reply Quote farna Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 8:42am
	I agree with John. Unless you had the engine balanced by a machine shop when it was rebuilt, it will be ready to take a stock flywheel and still be in balance within factory specs if you get a 304 flywheel. Many have made the change from auto to stick and vice-versa this way over the years.
	Frank Swygert

THE MENACE Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Nov/04/2008 Location: So. California Status: Online Points: 4437	Post Options Post Reply Quote THE MENACE Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 11:44am
	American part depot has a listing for new 304 flywheels! #910 5601C, Doug sells them for $195.00. Dennis
	Former Owner of: The Craig Breedlove "AERO AMX" Still Owner: SS/AMX #9 replica (THE BIG MENACE) 70 AMX 416, EFI, Nash 5 speed 70 Javelin 401, 727 (Wife's car) 72 Gremlin Autocross Project.

401MATCOUPE Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367	Post Options Post Reply Quote 401MATCOUPE Report Post Thanks(0) Quote Reply Posted: Dec/18/2014 at 12:20pm
	I may have a 304 Flywheel, but first what year engine are we working with......need to know if it is 70-71 or 72 up...IE Flat Flange Crank (70-71) or Step Flange (72-up). Complete different animals, I have a 72 up flywheel for 304, just need to find....
	Ross K. Peterson 68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT

White70JavelinSST Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867	Post Options Post Reply Quote White70JavelinSST Report Post Thanks(0) Quote Reply Posted: Dec/19/2014 at 9:00am
	Be real careful here, I got the heck bomb-blasted out of me for posting a photo of a 79 304 flywheel that came from the factory on a 79 Spirit AMX with the SR4 four speed manual. The later and last versions of the 304 may actually have a six cylinder flywheel that was fitted and drilled for Detroit balance. I know someday someone else is going to come forward and say the same thing. just sayin, Armand
	70 Javelin SST, second owner, purchased 1972

Javelin69 Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Dec/11/2013 Location: Madison wi Status: Offline Points: 187	Post Options Post Reply Quote Javelin69 Report Post Thanks(0) Quote Reply Posted: Dec/20/2014 at 8:32am
	Did a few on line searches and all that comes up are 360 ones. Don't know why APD didn't show up. (Usually does in such cases). My son would like something cheaper, but at least we've got that option. Thanks! PS the engine is a 74 in case anyone's got one for sale.

401MATCOUPE Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367	Post Options Post Reply Quote 401MATCOUPE Report Post Thanks(0) Quote Reply Posted: Dec/20/2014 at 9:05am
	I'll send you a PM on flywheel.
	Ross K. Peterson 68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT