360 vs 390 flywheel and clutch - Ford Truck Enthusiasts Forums



360 vs 390 flywheel and clutch

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 03-24-2011, 10:30 PM
bigred.102 bigred.102 is offline
New User
Thread Starter
 
Join Date: Mar 2011
Posts: 15
bigred.102 is starting off with a positive reputation.
360 vs 390 flywheel and clutch

I have a 390 that has a flywheel off of a 360 on it and I am in need of a new clutch.


I am wondering what the difference is between the 360 and 390 flywheels are, or the biggest clutch I can put on the 360 flywheel is or one with good holding power


the 390 has always slipped the clutch which is a stock one for the 360 so I am looking for more holding power.

and i have a np 435 tranny

Sorry about the confusing post and thanks for any help.
Reply With Quote
  #2  
Old 03-25-2011, 12:06 AM
Ziegelsteinfaust's Avatar
Ziegelsteinfaust Ziegelsteinfaust is offline
Posting Guru
 
Join Date: Dec 2010
Location: Chino Hills
Posts: 1,232
Ziegelsteinfaust is starting off with a positive reputation.
The clutchs and flywheels are the same.

You can get a McLoud or Centerforce to correct slipping issues, but as far as stock they were the same.
Reply With Quote
  #3  
Old 03-25-2011, 08:59 AM
Krewat's Avatar
Krewat Krewat is offline
Super Moderator
 
Join Date: Jul 2002
Location: Long Island USA
Posts: 37,078
Krewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputationKrewat has a superb reputation
Well, they SHOULD be the same. But after all this time, if anyone else owned it, or worked on it, you never know what someone might have done.

I did some up against this one time, where a 390 flywheel I got from somewhere had a bigger bolt pattern than the 360 I had, and no, it wasn't an FT flywheel, or a 428/410 flywheel that had been neutral-balanced.

I don't know for sure, but at the time, I just figured it was a year-related thing, and at some point, either with the 352, or some other reason, they went to a larger clutch.

I would get a "heavy-duty" pressure plate, NOT REBUILT, if indeed the clutch is actually slipping with the 390.

Does the flywheel have a step cut into it where the clutch plate contacts it?
Reply With Quote
  #4  
Old 03-25-2011, 09:08 AM
bigred.102 bigred.102 is offline
New User
Thread Starter
 
Join Date: Mar 2011
Posts: 15
bigred.102 is starting off with a positive reputation.
thanks for the responses. So it seems that it may be the same clutch depending on years. The clutch is sliping in ether 3rd or 4th gear I can bring it to the point of smoking just mashing the throttle
Reply With Quote
  #5  
Old 03-25-2011, 09:24 AM
bigred.102 bigred.102 is offline
New User
Thread Starter
 
Join Date: Mar 2011
Posts: 15
bigred.102 is starting off with a positive reputation.
The face of the flywheel (where the clutch goes) is flat acros the entier serface, if I remember right

Just realized I hadn't address addresed question
Reply With Quote
  #6  
Old 03-25-2011, 09:27 AM
fordman400's Avatar
fordman400 fordman400 is offline
Senior User
 
Join Date: Oct 2003
Location: wisconsin
Posts: 161
fordman400 is starting off with a positive reputation.
I have seen different size clutchs depending upon year and parts store. But from what I have come across is the 360 came with a 10.5 inch clutch replaced with 11 at most stores. 390 had 11.5 inch clutch disc now replaced by 12. Autozone and Advance auto list 11 for 360 and 12 for 390. In either long style pressure plate or diaphram.
I have put a 12 inch 390 flywheel and clutch kit on my 360.
Forgot to add that a lot of places list the 360 parts for both. I guess the 10.5 inch clutch and their 11 inch replacements are more common.
This is what I have seen.

Last edited by fordman400; 03-25-2011 at 09:36 AM. Reason: added statements
Reply With Quote
  #7  
Old 03-27-2011, 10:51 AM
notmyrealname notmyrealname is offline
Junior User
 
Join Date: Mar 2011
Location: Rock Hall,MD
Posts: 81
notmyrealname is starting off with a positive reputation.
The 390 flywheel has a bigger bolt circle
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Info on 360 and 390 ford_maniac-68 1967 - 1972 F-100 & Larger F-Series Trucks 1 03-04-2017 10:53 AM
360 to 390 or to 351m? Mejamz Ewe FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) 15 05-09-2011 04:57 PM
Will a 390 flywheel fit a pre-79 460? Catman 24 1973 - 1979 F-100 & Larger F-Series Trucks 15 02-15-2011 04:30 AM
390 Clutch Size Andy_Bracy FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) 4 08-24-2005 10:06 PM
11.5 inch clutch replacement paulbunyan22041 Clutch, Transmission, Differential, Axle & Transfer Case 1 04-02-2004 07:26 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
360, 390, 400, biggest, clutch, clutches, f250, fe, flywheel, flywheels, ford, plate, pressure, stepped, vs

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 09:05 AM.