Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

Spec twin disc

Thread Tools
 
Search this Thread
 
Old Sep 15, 2014 | 08:05 PM
  #1  
99VetteFRC's Avatar
Thread Starter
TECH Fanatic
 
Joined: Oct 2011
Posts: 1,356
Likes: 2
From: Felton Pa
Default Spec twin disc

I have installed a Spec Super twin disc clutch with a OE replacement slave cylinder. I called Spec with the part number and they say it is a direct bolt in for an Fbody. They say it uses a OE slave. When I install it, the slave seems to be too long and is causing the cluch to disengage. Has anyone had this problem? Has anyone used a Spec super twin successfully? Advice would be appreciated.
Spec twin disc-dscn1790.jpg

Spec twin disc-dscn1789.jpg
Reply
Old Sep 16, 2014 | 09:41 AM
  #2  
MX6.0's Avatar
11 Second Club
 
Joined: Sep 2011
Posts: 390
Likes: 2
From: The Burnie, MD
Default

Originally Posted by 99VetteFRC
I have installed a Spec Super twin disc clutch with a OE replacement slave cylinder. I called Spec with the part number and they say it is a direct bolt in for an Fbody. They say it uses a OE slave. When I install it, the slave seems to be too long and is causing the cluch to disengage. Has anyone had this problem? Has anyone used a Spec super twin successfully? Advice would be appreciated.
Attachment 469387

Attachment 469388
I actually have the same clutch in my car. I used the same F-body slave cylinder but the throwout bearing is a Spec part. I seem to recall it being slightly shorter than the stock throwout bearing.

Other than that it's been flawless. No shims, no balancing, ect..
Reply
Old Sep 16, 2014 | 10:03 AM
  #3  
MX6.0's Avatar
11 Second Club
 
Joined: Sep 2011
Posts: 390
Likes: 2
From: The Burnie, MD
Default

I take that back about the Spec throwout being shorter. It's the same height but actually smaller in diameter than the stock unit.

Did you remove the throwout spring before taking your measurements?

Also, since the flywheel/pressure plate are already balanced, be sure to line up the corresponding #1's when putting them back together.

Here's a few picks from when I put mine together. Twin Clutch
Reply
Old Sep 17, 2014 | 02:39 PM
  #4  
99VetteFRC's Avatar
Thread Starter
TECH Fanatic
 
Joined: Oct 2011
Posts: 1,356
Likes: 2
From: Felton Pa
Default

After calling spec, I found out that the clutch needs rebuilt. I am just going to get rid of it and get a new clutch
Reply




All times are GMT -5. The time now is 11:23 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE