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#1042968 - 08/30/16 11:07 PM T56 6spd Manual Transmisson install into a Gbody  
Joined: Nov 2010
Posts: 828
the_merv Offline
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the_merv  Offline
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Joined: Nov 2010
Posts: 828
Northern, Florida
Someone asked me if there was info about this so I figure this would help some people out.

Putting a T56 6spd into a Gbody is pretty simple and straighforward, not much to it, just like installing any other Transmission pretty much.

It's good to start with getting all the parts:

T56 6spd Transmission (LT1/LS1 Fbody or GTO Type)
Clutch, Flywheel, Pressure Plate, Pilot Bushing/Bearing
Clutch Pedal & Hydraulics
Shifter & Crossmember (several companies make one now for Gbodies)
Depending on what you have in the car you may need a driveshaft or work done to the current one you have if you do not want to buy a new one. It uses the standard GM 27 Spline Slipyoke

I bought and built up a low mileage (like 20k miles on it) Tremec T56 6spd Transmission. Along with it, I bought the GM LS7 Clutch Kit with ARP Flywheel Bolts., I have a 6.0l LS Engine in my car, you guys with the Gen 1 & 2 SBC just get the appropriate parts & LT1 Fbody style T56 Transmission.

Since most of these cars were factory automatic there is no factory Clutch Pedal that will work with this. You can buy one from the few people that build them, or you can build your own.

I installed the Master Cylinder on the fire wall like it would have come in a LS Fbody. Once I did this I built a Clutch Pedal using parts from an early 90's S10 Pedal. This seemed to work perfectly for the geometry and full movement of the Master Cylinder. The geometry and movement are critical in this case, it has to have full movement as straight as possible so the rod will not bind and bend.

$7 at the junkyard and a few hours of time I had a Clutch Pedal built..



I used a longer grade 8 bolt and mounted it next to the factory Brake Pedal. I cut the Brake Pedal down so it would clear the Clutch Pedal and use the proper size Pedal Pad..





I bought the T56 and got to the shop with it, then tore it down for inspection. Everything looked pretty much new but I always upgrade them..



Parts showed up a couple days after to build it with the LS7 Clutch Kit. If going LS buy a Speed Bleeder, they are worth it.



I re-built the T56 with the upgrades and it was ready for install..



Pilot Bushing installed and LS7 Flywheel was bolted to the back of the 6.0l..



LS7 Clutch Disc and Pressure Plate installed..



Slave Cylinder with Speed Bleeder mounted on the Transmission ready for install into the car..



T56 and Crossmember installed into the car and driveshaft installed..



The Shifter was then installed and the Center Console put back together. I made a custom Shifter Plate for my SS..



Then bleed the Clutch out and take it for a drive. Nothing much to it really and it's pretty fun to row gears with..



1984 MONTE CARLO SS 6spd
6.HO | LS6 INTAKE | CUSTOM CAM | BUILT T56 | CUSTOM 9" REAR | 3.89 GEARS
2002 EBM C5 Z06 | FREE MODS | BOLTONS WITH TUNE
#1042969 - 08/30/16 11:21 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: the_merv]  
Joined: Nov 2010
Posts: 828
the_merv Offline
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the_merv  Offline
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Joined: Nov 2010
Posts: 828
Northern, Florida

Couple pics for you guys of the car and setup..









1984 MONTE CARLO SS 6spd
6.HO | LS6 INTAKE | CUSTOM CAM | BUILT T56 | CUSTOM 9" REAR | 3.89 GEARS
2002 EBM C5 Z06 | FREE MODS | BOLTONS WITH TUNE
#1043199 - 09/05/16 03:38 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: the_merv]  
Joined: Feb 2000
Posts: 3,930
Dalt10 Offline
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Dalt10  Offline
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Member

Joined: Feb 2000
Posts: 3,930
Orlando,FL
Car looks good. I'm sure it's a blast to drive with the LS motor and the T-56. Makes it a complete different car.


"Make the rules up as you go"
US Army 1977- 1981
101st Airborne 31st Field Artillary FT Campbell, KY
1/1 Cav 280th ORD Schwabach, Germany
#1043200 - 09/05/16 03:45 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: Dalt10]  
Joined: Sep 2007
Posts: 3,184
1 Slow SS Offline
10+ Year
1 Slow SS  Offline
10+ Year
Member

Joined: Sep 2007
Posts: 3,184
Small town KY
Merv puts together LS swaps like most people choose that days outfit. The dudes a machine man!

I really like that ball valve on the heater hose.... laugh


Last edited by 1 Slow SS; 09/05/16 03:46 PM.

Enjoy life, family first!
#1043215 - 09/06/16 12:00 AM Re: T56 6spd Manual Transmisson install into a Gbody [Re: the_merv]  
Joined: Nov 2010
Posts: 828
the_merv Offline
Member
the_merv  Offline
Member

Joined: Nov 2010
Posts: 828
Northern, Florida
Haha thanks man..I get bored I build stuff.

Yea that valve was $3 compared to the $25+ for the original vac one.


1984 MONTE CARLO SS 6spd
6.HO | LS6 INTAKE | CUSTOM CAM | BUILT T56 | CUSTOM 9" REAR | 3.89 GEARS
2002 EBM C5 Z06 | FREE MODS | BOLTONS WITH TUNE
#1043217 - 09/06/16 12:02 AM Re: T56 6spd Manual Transmisson install into a Gbody [Re: Dalt10]  
Joined: Nov 2010
Posts: 828
the_merv Offline
Member
the_merv  Offline
Member

Joined: Nov 2010
Posts: 828
Northern, Florida
Originally Posted By: Dalt10
Car looks good. I'm sure it's a blast to drive with the LS motor and the T-56. Makes it a complete different car.


It is tons of fun, power everywhere, it just goes. That and it gets a ton of attention.


1984 MONTE CARLO SS 6spd
6.HO | LS6 INTAKE | CUSTOM CAM | BUILT T56 | CUSTOM 9" REAR | 3.89 GEARS
2002 EBM C5 Z06 | FREE MODS | BOLTONS WITH TUNE
#1043626 - 09/17/16 08:05 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: the_merv]  
Joined: Sep 2007
Posts: 163
jrz126 Offline
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jrz126  Offline
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Joined: Sep 2007
Posts: 163
Erie PA
any pics of the firewall side of the master cylinder?

Did you have to enlarge the stock hole in the firewall at all?

Looks like mine lines up perfectly with the brake pedal if i use the hole as is.

#1043715 - 09/20/16 12:28 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: the_merv]  
Joined: Apr 2001
Posts: 2,099
345HP87SSAC Offline
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15+ Year
345HP87SSAC  Offline
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Posts: 2,099
Stanberry, MO
Nice write up. That is what I need behind my 6.0,


[Linked Image]
New BTR Stage 4 cam makes 449 HP and 380 TQ TQ at the wheels. 6.0 LY6 VVT and 4L85E!blackgoldaero http://www.cardomain.com/ride/671193
#1043720 - 09/20/16 02:18 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: 345HP87SSAC]  
Joined: Nov 2000
Posts: 2,393
Tunedss86 Offline
15+ Year
Tunedss86  Offline
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Posts: 2,393
Eastern Virginia
Originally Posted By: 345HP87SSAC
Nice write up. That is what I need behind my 6.0,


That's what I have behind mine. (Insert Tim Allen grunt here)

#1043905 - 09/26/16 09:48 PM Re: T56 6spd Manual Transmisson install into a Gbody [Re: jrz126]  
Joined: Nov 2010
Posts: 828
the_merv Offline
Member
the_merv  Offline
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Joined: Nov 2010
Posts: 828
Northern, Florida
Originally Posted By: jrz126
any pics of the firewall side of the master cylinder?

Did you have to enlarge the stock hole in the firewall at all?

Looks like mine lines up perfectly with the brake pedal if i use the hole as is.


I do have a picture, took one last weekend when I detailed the Engine Bay.

I hammered on the fire wall a little bit to mount the master where the geometry was proper with the Clutch Pedal that I built, it lines up with it about perfectly. It's mounted through the stock cruise control hole, I had to drill one other bolt hole to get it to line up right.



1984 MONTE CARLO SS 6spd
6.HO | LS6 INTAKE | CUSTOM CAM | BUILT T56 | CUSTOM 9" REAR | 3.89 GEARS
2002 EBM C5 Z06 | FREE MODS | BOLTONS WITH TUNE

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