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

Cts-v t56

Thread Tools
 
Search this Thread
 
Old Aug 24, 2010 | 09:49 PM
  #1  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default Cts-v t56

First of all this is going into a 1967 GTO, with a 5.3L to power it, i can get a T56 out of a CTS-v for about $700, now i know the tail shafts are different, so is the output shaft, and the input shaft takes a specific pilot bearing. what else would i need to do to make this work if i were to go this route?

already those two parts make me want to look for something else.
Reply
Old Aug 25, 2010 | 06:27 AM
  #2  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

The small shift parts (shift lever, offset lever, shift rail, guide plate, etc.)

You'll end up with a GTO MN12 clone, triple/double cone synchros, solid 1-2 synchro keys, steel 3-4 fork already included.

It's not too bad.
Reply
Old Aug 25, 2010 | 08:36 AM
  #3  
scatillac's Avatar
TECH Enthusiast
iTrader: (12)
 
Joined: Jun 2006
Posts: 585
Likes: 2
From: Ruckerville, Ky
Default

The 04-07 V's T56 requires a truck pilot bearing (4.8L w/NV3500). The clutch slave will require a spacer to function with an F or Y-car clutch/flywheel configuration. Both of these issues are because the transmission is located rearward from the standard LS1/6 location due to the V's dual-mass flywheel.

The slave spacer is available from Katech or TPIS.

The shifter is another issue altogether if you retain the stock CTS-V tailshaft/extension housing. The Keisler forward-mount shifter will work by fabricating a bushing for the reverse blocking solenoid's op rod.

It is a good transmission and is worth the trouble.
Reply
Old Aug 25, 2010 | 10:26 AM
  #4  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

Originally Posted by scatillac
The clutch slave will require a spacer to function with an F or Y-car clutch/flywheel configuration. Both of these issues are because the transmission is located rearward from the standard LS1/6 location due to the V's dual-mass flywheel.
Are you positive of that? The CTSv slave is longer, but it's also lipped and located the TOB at the exact same location as the F-body slave which rests on the front plate lip:

http://www.eecis.udel.edu/~davis/z28...TSv-GTO-slave/
Reply
Old Aug 25, 2010 | 12:33 PM
  #5  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

Originally Posted by 85MikeTPI
The small shift parts (shift lever, offset lever, shift rail, guide plate, etc.)

You'll end up with a GTO MN12 clone, triple/double cone synchros, solid 1-2 synchro keys, steel 3-4 fork already included.

It's not too bad.
okay so im thinking if i can get away with it, to just use the CTS-V tail shaft housing and output shaft. just possibly switch to the Keisler shifter that installs in the front inspection plate area that scatillac was talking about.

does that sound like a bad idea or a good one?

one other question....will the transmission mount be in the same location???

thanks a bunch for your help guys!

EDIT: just thought about this....the CTS-V tailshaft doesnt have a slip yoke, and since this is going into a 1967 GTO i will obviously need the driveshaft to move with the flex of the suspension

Last edited by 67goatman455; Aug 25, 2010 at 01:05 PM.
Reply
Old Aug 25, 2010 | 02:40 PM
  #6  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

The trans mount would be in the same approx location.

You'd need to get the CTSv damper that mounts to the output flange and the slip tube for the driveshaft.. Not impossible, but not fun IMHO..

One of the conversions I did is phone-documented here:
http://www.eecis.udel.edu/~davis/z28...0813-CTSv-GTO/

The Keisler mid-shift conversion I did on an LT1 T56 is here for reference:
http://www.eecis.udel.edu/~davis/z28...100116_LT1T56/
Reply
Old Aug 25, 2010 | 04:28 PM
  #7  
scatillac's Avatar
TECH Enthusiast
iTrader: (12)
 
Joined: Jun 2006
Posts: 585
Likes: 2
From: Ruckerville, Ky
Default

Originally Posted by 85MikeTPI
Are you positive of that? The CTSv slave is longer, but it's also lipped and located the TOB at the exact same location as the F-body slave which rests on the front plate lip.
I've measured the amount of main drive that extends beyond the bellhousing on both an F-body T56 and the V T56 (using the bellhousing for each specific vehicle). The V T56 measures the same a the truck NV3500, which, by the way, is the same as the measurement for an SBC/Monza bellhousing/T10 configuration.

I've also used the 05 LS6 flywheel/clutch with the LS7 swap in my V and I can tell you, the clutch wouldn't have released without the spacer.

Oddly enough, the Katech spacer is quite a bit thicker than the TPIS spacer. The TPIS spacer is currently in the car with no issues.

Also, when I put the F-body T56 in my truck, I had to use the F/Y pilot bearing as the shaft went deeper into the crank.

This is also the unit that got the Keisler forward-mount shifter and while I was installing it, I opened my spare V T56 to check for the Keisler shifter's compatibility with the V trans, Except for the sleeve for the smaller rear rod it's a go! You'd also have to make a short-sectioned two-piece driveshaft or use the method you described.
Reply
Old Aug 25, 2010 | 05:51 PM
  #8  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

Originally Posted by 85MikeTPI

You'd need to get the CTSv damper that mounts to the output flange and the slip tube for the driveshaft.. Not impossible, but not fun IMHO..
as in the factory deal? basically it bolts to the outputshaft flange and has a male end of a slip yoke on it?

and also if i bought this CTS-V trransmission, the keisler shifter would basically bolt right in without disassembling the transmission correct?
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
Old Aug 25, 2010 | 06:06 PM
  #9  
85MikeTPI's Avatar
TECH Addict
iTrader: (9)
 
Joined: Jun 2008
Posts: 2,172
Likes: 10
From: Newark, DE
Default

Originally Posted by 67goatman455
as in the factory deal? basically it bolts to the outputshaft flange and has a male end of a slip yoke on it?

and also if i bought this CTS-V trransmission, the keisler shifter would basically bolt right in without disassembling the transmission correct?

Yes, the factory driveshaft setup, modified to fit your application.. Not fun, but doable.

You need to disassemble the trans to install the mid-shift kit, unless you don't plan on retaining the rev-lockout.
Reply
Old Aug 25, 2010 | 06:18 PM
  #10  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

Originally Posted by 85MikeTPI
Yes, the factory driveshaft setup, modified to fit your application.. Not fun, but doable.

You need to disassemble the trans to install the mid-shift kit, unless you don't plan on retaining the rev-lockout.
i have never hear of rev-lockout, but it doesnt sound like a fun thing to have. ill have to do some research on the drive shaft thing, if i can find any info
Reply
Old Aug 25, 2010 | 06:44 PM
  #11  
raven154's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (14)
 
Joined: Feb 2007
Posts: 2,342
Likes: 0
From: Owasso, OK
Default

rev-lockout=reverse lockout. He was just saying if you want to keep it, which is a good thing to have, you need to disassemble the trans to install the mid shift kit instead of the remote shifter.
Reply
Old Aug 25, 2010 | 06:55 PM
  #12  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

Originally Posted by raven154
rev-lockout=reverse lockout. He was just saying if you want to keep it, which is a good thing to have, you need to disassemble the trans to install the mid shift kit instead of the remote shifter.
now i feel stupid lol, thank you for clarifying.
Reply
Old Aug 25, 2010 | 11:52 PM
  #13  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

so lets say i do go with this CTS-V unit, I have checked and having the shifter that far forward (if moved to the front access hole) it would be too far out of reach, can the Stock CTS-V shifter mechanism be made to be more "performance oriented"? someone mentioned that "the stock shifter feel in a V has no place in a performance car" is why i ask.

Also would it be unreasonable to use the stock front section of the drives haft, then have a custom one made to utilize the slip yoke? or might i run into issues of the suspension having too much travel for how short the drive shaft would be?

thanks a lot for all your help so far guys!
Reply
Old Aug 26, 2010 | 06:32 PM
  #14  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

nothing?
Reply
Old Aug 26, 2010 | 07:41 PM
  #15  
raven154's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (14)
 
Joined: Feb 2007
Posts: 2,342
Likes: 0
From: Owasso, OK
Default

I can tell you that the shifter in the V does suck! You can mod the shifter to make it a short throw and it helps a ton but still not as nice as normal shifter. The remote shifter just sucks.
Reply
Old Aug 29, 2010 | 02:56 PM
  #16  
LS123's Avatar
Banned
iTrader: (11)
 
Joined: Mar 2004
Posts: 376
Likes: 0
From: Rowing 6 speeds Maryland
Default

It will be a quite a bit of work making the CTSV trans work in your application. First, you would have to disassemble the trans to replace the main shaft with a GTO unit (if you want to use the slip yoke) and while you're at it, install the forward shift position. You would need a F body/GTO tailshaft housing also. You mind as well upgrade to billet keys and bronze fork pads while you have everything apart.

I'm currently building a GTO T56 trans for a 70 GTO. Working on the position of the shifter and the off-set needed to make it work.

If I solve the shifter loacation issue, I'll post it here.
Reply
Old Aug 29, 2010 | 10:50 PM
  #17  
67goatman455's Avatar
Thread Starter
TECH Fanatic
iTrader: (14)
 
Joined: Jun 2008
Posts: 1,109
Likes: 0
From: Wichita, KS
Default

Originally Posted by LS123
It will be a quite a bit of work making the CTSV trans work in your application. First, you would have to disassemble the trans to replace the main shaft with a GTO unit (if you want to use the slip yoke) and while you're at it, install the forward shift position. You would need a F body/GTO tailshaft housing also. You mind as well upgrade to billet keys and bronze fork pads while you have everything apart.

I'm currently building a GTO T56 trans for a 70 GTO. Working on the position of the shifter and the off-set needed to make it work.

If I solve the shifter loacation issue, I'll post it here.
thank you for the response. I ended up finding an f-body T56 today that scratched 3rd gear when removed, came with bellhousing, fresh LS7 clutch, slave cyl, and a stock hurst shifter for only $700!

lesson learned, just search for a while and eventually you can find a good deal
Reply
Old Apr 8, 2012 | 07:40 PM
  #18  
bobbyrandolph440's Avatar
Registered User
 
Joined: Apr 2012
Posts: 3
Likes: 0
From: cleveland tn
Default

I know this is old but I have a few questions about swaping the ctsv trans and swaping tail shaft
Reply
Old May 3, 2015 | 08:16 AM
  #19  
showdog75's Avatar
TECH Fanatic
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Mar 2014
Posts: 1,153
Likes: 252
From: Hixson TN
Default

Originally Posted by LS123
It will be a quite a bit of work making the CTSV trans work in your application. First, you would have to disassemble the trans to replace the main shaft with a GTO unit (if you want to use the slip yoke) and while you're at it, install the forward shift position. You would need a F body/GTO tailshaft housing also. You mind as well upgrade to billet keys and bronze fork pads while you have everything apart.

I'm currently building a GTO T56 trans for a 70 GTO. Working on the position of the shifter and the off-set needed to make it work.

If I solve the shifter loacation issue, I'll post it here.
Ok I know this is a old thread I'm resurrecting but I'm doing a ls swap with a cts-v t56 and i have questions and maybe a answer or two as well. First from my limited knowledge of this tranny it uses the forward shifter location just has the funky rear mounted shifter from the factory. I recently purchased a Core-shifter shifter that mounts in the forward location so the shifter will be in a normal location in my Chevy II. I'm likely going with ls7 clutch components including the slave since these trans had the cts-v duel mass flywheel and i don't want to use a spacer. My questions regard the driveshaft setup. What is the proper setup using the flanged output?
Reply
Old May 8, 2015 | 10:41 PM
  #20  
amargari's Avatar
Teching In
 
Joined: Nov 2007
Posts: 6
Likes: 0
Default

Originally Posted by showdog75
Ok I know this is a old thread I'm resurrecting but I'm doing a ls swap with a cts-v t56 and i have questions and maybe a answer or two as well. First from my limited knowledge of this tranny it uses the forward shifter location just has the funky rear mounted shifter from the factory. I recently purchased a Core-shifter shifter that mounts in the forward location so the shifter will be in a normal location in my Chevy II. I'm likely going with ls7 clutch components including the slave since these trans had the cts-v duel mass flywheel and i don't want to use a spacer. My questions regard the driveshaft setup. What is the proper setup using the flanged output?
You need a driveshaft with slip joint in it like this one





I used a CTS-V T56 in my swap and just built my own remote shifter. Click the link below for details.

http://www.apiem.com/camaro/LS6PT320140929.asp
Reply




All times are GMT -5. The time now is 10:03 PM.

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