center force heavy flywheel? - Rubicon Owners Forum
 19Likes
  • 1 Post By moho
  • 1 Post By Mouse
  • 2 Post By aeroshots
  • 3 Post By Norminator
  • 3 Post By moho
  • 4 Post By stangmata
  • 2 Post By Beltway Bandit
  • 3 Post By Norminator
 
LinkBack Thread Tools
post #1 of 9 (permalink) Old 12-11-2019, 01:03 PM Thread Starter
Rubi Noobie
 
Join Date: Mar 2019
Posts: 2
center force heavy flywheel?

hello new here own 2005 rubicon lj getting ready to replace the clutch and of course the flywheel throw out bearing etc. Any way wondering anyone have experience with heavier fly wheel ?
Wildrat likes this.
moho is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 12-12-2019, 08:45 AM
Administrator
 
johncanfield's Avatar
 
Join Date: Oct 2010
Location: Texas Hill Country
Posts: 10,414
Garage
Your first post - welcome! Have never heard of a heavier flywheel for a TJ/LJ. By the way, don't let a shop resurface the flywheel as its surface is concave by design.

John - WB5THT
=======================
2006 LJ, not stock
johncanfield is online now  
post #3 of 9 (permalink) Old 12-12-2019, 08:50 AM
Official WebWheeler
 
Mouse's Avatar
 
Join Date: Mar 2007
Location: West Ogden, UT
Posts: 3,310
Garage
Quote:
Originally Posted by johncanfield View Post
Your first post - welcome! Have never heard of a heavier flywheel for a TJ/LJ. By the way, don't let a shop resurface the flywheel as its surface is concave by design.
We know some folks who have a heavier than stock flywheel on an old CJ. The heavy flywheel helps at low speed; acts like additional engine torque. I haven't heard of anyone using one in a TJ either, but I wouldn't be surprised to hear about one.
johncanfield likes this.

Lives in garage:

2004 Red Jeep TJ "X", big tires, suspension, stereo delete, dent in cowl.


1982 Red Jeep Scrambler, small block chevy on 35's.

"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." -Benjamin Franklin
Mouse is offline  
 
post #4 of 9 (permalink) Old 12-12-2019, 12:38 PM
Rubicus Maximus
 
aeroshots's Avatar
 
Join Date: Sep 2010
Location: Gulf Breeze
Posts: 582
Garage
The theory is sound. I've also never experience the result or know of anyone trying it.
I've used lightened flywheel on sandrails where we wanted high rpm quickly and rpm back to idle quickly--works excellent.
johncanfield and Desert Dog like this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
aeroshots is offline  
post #5 of 9 (permalink) Old 12-12-2019, 09:22 PM
Rubicus Maximus
 
Norminator's Avatar
 
Join Date: Jun 2004
Location: Southern California
Posts: 1,286
Garage
Good to have you aboard. Are you going to do the work? We would benefit from your write up.
Mouse, johncanfield and Desert Dog like this.

It doesn't matter who you are until you are whom you are supposed to be.
Norminator is offline  
post #6 of 9 (permalink) Old 12-15-2019, 10:19 AM Thread Starter
Rubi Noobie
 
Join Date: Mar 2019
Posts: 2
yes i will do the work thanks for everyone's welcome and replies being here in illinois this will happen in spring and ias to a write up which i have never tackled not sure how well it would be but guess i could try i also own a 98 cherokee with a ax15 5 speed and i installed a luc clutch in it, so i do not feel it is much different
Mouse, johncanfield and Desert Dog like this.
moho is offline  
post #7 of 9 (permalink) Old 12-23-2019, 12:48 PM
RubiconOwnersForum.com Premium
 
stangmata's Avatar
 
Join Date: Jun 2010
Location: STL
Posts: 1,201
Welcome!

The stock flywheel is a dual mass concave design. I did a lot of flywheel research when I first replaced my clutch several years ago. My recommendation is to stay with the factory flywheel and like John said, do not have it resurfaced. Just hit it with a little emery and some simple green.

I personally don't see the benefit of the heavier flywheel. The dual mass works well with the 6-speed and the 4.0L. If you need more low end grunt due to tire size, etc, then I recommend you look at gears - cause mine climbs like a damn billy goat in 1st with the clutch out.

If you're near the STL area, let me know if you need some help. I've had my trans out several times. The clutch on these isn't difficult at all, just a few small gotchas that you should be ready for...like the the external torx bolt holding the trans in that you should replace with a hex bolt while you're in there. PITA.

-Ian-
05 Rubicon Sahara Unlimited #362. 6 speed | Hard & Soft top/doors | Anti-Rock | Hanson bumpers | PS Sliders | 3" Susp lift | Superlift shocks | 285/75-16 GY MT/Rs | Supa-cheapo winch | Banks cat-back | MCAI | SOLID diff covers | RE Hand Throttle | ORO LiteDots | ORF Sport Cage | Black Magic Brakes | Cobra 18WXSTII | Fancy seat covers
stangmata is offline  
post #8 of 9 (permalink) Old 12-27-2019, 10:21 AM
Rubi Noobie
 
Join Date: Sep 2010
Posts: 1
Concave flywheels designed for noobs

I had my clutch replaced a little over a year ago on my 2005 Rubicon unlimited. Used a Luk Gold series, and tossed the cheesy plastic throwout bearing, I think for a SKF branded one. Had the flywheel taken down a one thousandths of an inch. The machine shop that performed it said they've done dozens of them, and showed me their shop manual pertaining to that model of Mopar flywheel and that the limit is three thousandths of an inch. They also explained the reason behind the "factory concave finish" is for persons unfamiliar with clutching, providing a 'smooth engagement' for the uninitiated. It's mostly for the sales people to show how it easy it was, 15 years ago to drive a standard transmission. I asked the machinist why the Jeep service manual 'recommends not surfacing and buying a new flywheel', and he stated "because they want you to buy expensive parts that are not needed." and he further stated "your flywheel is fine, no scoring or burn marks, what is it about five years old?" and he was surprised when I told him 13 years old. And I wasn't gentle with it either. Was almost certain I'd burned on at least two occasions. But after I had the flywheel and clutch installed, I noticed no difference on engagement whatsoever, and that was over 10,000 miles ago. So, in finality, don't believe that crap about it being concave permanently, it wears flat anyways. But above all, stay away from the Centerforce brand. I'm sure for the rice burners, and boulevard blasters that produce their torque and horsepower curves above 7K RPM, it does no real benefit for a trail haulin Jeep.
Mouse and johncanfield like this.
Beltway Bandit is offline  
post #9 of 9 (permalink) Old 12-27-2019, 02:02 PM
Rubicus Maximus
 
Norminator's Avatar
 
Join Date: Jun 2004
Location: Southern California
Posts: 1,286
Garage
Thanks for posting. I see youíve actually been a member for a while. Mechanics are great insiders for information. His explanation sounds reasonable and satisfies the head scratching about the flywheel being concave. I would have wondered about his confidence except for his taking time with you and showing documentation. Iím not sure if I would trust other sources of flywheel surfacing to be as up to speed as he is.

Thanks for the info. Nice articulate recounting.
Mouse, johncanfield and Desert Dog like this.

It doesn't matter who you are until you are whom you are supposed to be.
Norminator is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Rubicon Owners Forum 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 email address for yourself.

Email Address:
OR

Log-in










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 On
Pingbacks are On
Refbacks are On

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