Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

The difference in RX and XT6 clutches.

  • Please log in to reply
11 replies to this topic

#1 gravelRX


    Driven with both feet.

  • Members
  • 885 posts
  • Roanoke, VA

Posted 26 January 2004 - 08:14 PM

Called Clutchmasters today and talked with Lonnie. I ask him the difference between the two. He put me on hold for a minute and came back and told me that from the mounting surface on the flywheel to the surface that the clutch engages is different by .012 inches.

The RX is 0.827 and the XT6 is 0.815.

He states that the difference of .012 will not let the XT6 pressure plate clamp fully onto the clutch disc and there MAY be slippage in the RPM range.

I have read that some people have used this cluch kit with the EA82 flywheel without problems.

I had ScotTM measure the flywheel I had lightened and resurfaced with a micrometer and he can't seem to get a consistent reading. (I'm 40 min. away) From 0.815 to 0.825.

Any thoughts from anyone?

I could take the flywheel back and have the pressure plate mounting surface milled but .... Hmmm Looking for a bit of input.



#2 GeneralDisorder


    Elite Master of the Subaru

  • Members
  • 21,312 posts
  • Portland

Posted 26 January 2004 - 08:20 PM

PM Qman - he's done it. He has an XT6 clutch with an EA82 flywheel on an EA81 mated to a D/R 5 speed. It's in his Brat, and went to the rubicon that way...... I'm sure he could tell you all about slippage if there is any.

I've seen it in action - doesn't look like there's any problem to me.


#3 Subarutex


    Oldschool Show Queen

  • Moderator
  • 2,551 posts
  • Mountlake Terrace

Posted 26 January 2004 - 08:31 PM

I have an xt6 flywheel and xt6 clutch and pressure plate in my RX. I've only slipped it once (not on purpose) and that was on an extremely hard launch (like redline clutch dump) on dry pavement.

#4 Qman


    Happiness is... no lag!!

  • Moderator
  • 11,119 posts
  • Sumner

Posted 26 January 2004 - 08:37 PM

Mine is an XT6 flywheel, pressure plate, and disc inside a 5sp D/R behind an EA81HO. This is for the '86 Brat

I will be using the EA82 flywheel turned to XT6 specs. Only reason is this flywheel has been lightened. This one will also go inside a 5sp D/R behind an EA81HO. This is for the '85 Brat

#5 gravelRX


    Driven with both feet.

  • Members
  • 885 posts
  • Roanoke, VA

Posted 26 January 2004 - 09:23 PM

By what has been posted, the easiest way to use the XT6 components would be to bring my flywheel into XT6 specs.

Anyone using the EA82 flywheel with the XT6 pp and clutch?

Thanks for the input.




    Elite Master of the Subaru

  • Members
  • 3,657 posts
  • Olympia

Posted 26 January 2004 - 09:39 PM

12 thou ain't much. I wonder what the wear tolerance is.
When the PP contacts the clutch disc, is it fully extended?
Or does it have additional travel as the disk wears?
When the flywheel is turned, do they turn the PP mounting surface too?

#7 gravelRX


    Driven with both feet.

  • Members
  • 885 posts
  • Roanoke, VA

Posted 26 January 2004 - 10:51 PM

Well, when mine was lightened and the surface turned, the performance shop that did it turned both the clutch surface and the pp surface.

guess he gets a bit more business.


#8 Dr. RX

Dr. RX

    Elite Master of the Subaru

  • Members
  • 9,984 posts
  • Sammamish, WA

Posted 27 January 2004 - 07:44 AM

I'm using a XT6 flywheel and an EA82T clutch assy, works great.

#9 Dennis ex24

Dennis ex24

    Subaru Disaster

  • Members
  • 2,683 posts
  • Phila, Pa

Posted 27 January 2004 - 10:04 AM

even the XT6 clutch isnt enough for modded EA82Ts in my opinion, mine will sit and burn through hard launches and i still havent figured out how im going to get around that at the track.

its alot better than the stock unit though...ive smoked brand new ones at mild boost levels before with out really trying.

#10 ShawnW


    Subaru Master Technician

  • Administrator
  • 12,953 posts
  • Denver, Colorado

Posted 27 January 2004 - 12:23 PM

So what do I tell a machine shop to do to an ea82T flywheel that I am using an XT6 clutch kit on then?

#11 gravelRX


    Driven with both feet.

  • Members
  • 885 posts
  • Roanoke, VA

Posted 27 January 2004 - 06:19 PM

From what I've gathered, you have to ask them to cut .012 off of the pressure plate mounting surface to get the correct depth in the "step" for the clutch disc.

XT6= 0.815
Ea82= 0.827


I learned of these measurements from clutchmasters, I would really like another source to verify it though.




#12 WJM



  • Members
  • 7,828 posts

Posted 27 January 2004 - 11:13 PM

I used an EA82T flywheel (to my knowledge), and XT6 (for sure) clutch and pres plate...BUT, my flywheel was lightened and had some other special work done....by the Skip'ster himself.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users