Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

Which roller pilot bearing?

Thread Tools
 
Search this Thread
 
Old Mar 9, 2014 | 09:43 PM
  #1  
70sPontiacs's Avatar
Thread Starter
Teching In
 
Joined: Nov 2010
Posts: 5
Likes: 0
Default Which roller pilot bearing?

I've never installed a newer transmission & clutch. The last clutch install I did on my 72 Firebird had the bronze bushing and mechanical linkage. So I've been researching a lot.
Here's why: I bought a LS3 crate engine from Pace Performance with the t56 install kit and a brand new T56 Magnum. However the kit from Pace included two pilot bearings. I'm guessing I need only one and it appears to me that I just need to use the smaller one because of the length of the input shaft on the trans. With the trans and bell housing bolted to the engine it looks like the splines enter the opening in the crank about 1/8", maybe a little more since I am just eyeballing it. Does that sound right, use the smaller one?
Attached Thumbnails Which roller pilot bearing?-bearings.jpg  
Reply
Old Mar 10, 2014 | 11:58 AM
  #2  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

It will depend on the trans/bell housing you're using.
The 98-02 F body and GTO T56 uses the smaller one in the inner flange. The CTS-V T56, corvette LS7, and 10+ F body 6060 has a longer bell and uses the outer flange with the larger bearing.

Since you have both, would you do me a favor and get an accurate ID and OD of the larger bearing? I think there are specs online quoting the wrong dimensions for that piece.

Originally Posted by 70sPontiacs
I've never installed a newer transmission & clutch. The last clutch install I did on my 72 Firebird had the bronze bushing and mechanical linkage. So I've been researching a lot.
Here's why: I bought a LS3 crate engine from Pace Performance with the t56 install kit and a brand new T56 Magnum. However the kit from Pace included two pilot bearings. I'm guessing I need only one and it appears to me that I just need to use the smaller one because of the length of the input shaft on the trans. With the trans and bell housing bolted to the engine it looks like the splines enter the opening in the crank about 1/8", maybe a little more since I am just eyeballing it. Does that sound right, use the smaller one?

Last edited by garys 68; Mar 10, 2014 at 12:06 PM.
Reply
Old Mar 10, 2014 | 05:53 PM
  #3  
70sPontiacs's Avatar
Thread Starter
Teching In
 
Joined: Nov 2010
Posts: 5
Likes: 0
Default

Originally Posted by garys 68
It will depend on the trans/bell housing you're using.
The 98-02 F body and GTO T56 uses the smaller one in the inner flange. The CTS-V T56, corvette LS7, and 10+ F body 6060 has a longer bell and uses the outer flange with the larger bearing.
Thanks Gary.
I am using the Quick Time RM8020 and the transmission is the TUET11012.

Originally Posted by garys 68
Since you have both, would you do me a favor and get an accurate ID and OD of the larger bearing? I think there are specs online quoting the wrong dimensions for that piece.
Here's the bearing sizes.
Attached Thumbnails Which roller pilot bearing?-imag0473.jpg   Which roller pilot bearing?-imag0475.jpg  
Reply
Old Mar 10, 2014 | 06:48 PM
  #4  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

Thanks for the confirmation, there's a lot of info out there indicating the bearing has an ID of 22.7mm or (.894"). Don't know where it started, but I've seen it on Rock Auto, Jegs, Summit, etc.
Good to know they're all wrong.
Reply
Old Mar 10, 2014 | 10:36 PM
  #5  
70sPontiacs's Avatar
Thread Starter
Teching In
 
Joined: Nov 2010
Posts: 5
Likes: 0
Default

You're welcome.

I'll go with the smaller bearing and see what happens.
Reply
Old Mar 11, 2014 | 07:56 AM
  #6  
cajundragger's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jan 2007
Posts: 345
Likes: 0
Default

I would measure. It isnt very hard and saves SO much headache...just search my posts lol.

bolt the bell house to the engine without the trans and it gives you an easy way to measure the depth of the input with a straight edge and tape measure.

you should also measure for the slave to see which slave you'll need and if you'll need any shims...again, search my name and you'll see all the grief I have had.
Reply
Old Mar 11, 2014 | 12:27 PM
  #7  
70sPontiacs's Avatar
Thread Starter
Teching In
 
Joined: Nov 2010
Posts: 5
Likes: 0
Default

I knew I needed to measure the slave cylinder. I don't know why it didn't occur to me to measure the input shaft the way you described.
Yes, the smaller is the correct one for my application. The splined portion of the input shaft is about 1/4" too long to use the larger one.
Thank you!!!
Reply
Old Mar 13, 2014 | 10:44 AM
  #8  
SNLPerformance's Avatar
FormerVendor
iTrader: (15)
 
Joined: Feb 2008
Posts: 3,335
Likes: 2
From: Ft. Worth, TX
Default

That should take a small bearing as that bell housing is the 4th Gen Fbody part number.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo




All times are GMT -5. The time now is 11:19 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE