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Converting the Slow-wagon to t-56

Questions, answers, help, tips and tech on transmissions.

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MISFITmalibu63
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Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Wed May 20, 2015 2:59 pm

well, i decided that im going to swap the 200-4r out of the wagon and change over to a t-56. i have probably read about 10 hours worth of information regarding swaps and parts to use. I already have the John Bzdel pedal. the rest i'll get from a donor car or most likely, craigslist. I apologize in advance, this is my first stick conversion. actually, its my first time working on a manual transmission \:D/

What parts should i replace or upgrade while doing this swap?
with a 2 piece rear gen 1 sbc i should be able to get by with the stock flywheel from an LT1?
what clutch is recommended for my power levels?

heres what my motor made for power in the previous owners car

Image

Image

i know i will need a new crossmember and driveshaft, and i also came across this website, as an alternative to getting the conversion box

http://www.t56cablespeedometer.com/" onclick="window.open(this.href);return false;

i think that covers the start of it, hopefully it goes as smooth as it looks!
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1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
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Doober
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Re: Converting the Slow-wagon to t-56

Post by Doober » Wed May 20, 2015 4:37 pm

http://www.thegearbox.org/T56.html" onclick="window.open(this.href);return false;

I'm not sure how hard some of those parts are to find, but they do sell an adapter plate that allows use of an older style bellhousing with the T56 case, so you could run a hydraulic t/o bearing, or use the stock G-Body bellhousing/clutch linkage with a clutch disc that fits the input shaft, and pressure plate of choice. The LT1 flywheel won't fit a 2pc rms, and I'm not 100% sure the LT1 flywheel is required with the stock T56 clutch fork/hydraulics. If you want to just use the stock T56 bellhousing I'm pretty sure you could still use a hydraulic t/o... there may also be clearance issues with the stock bellhousing/clutch slave setup but I'm not 100% sure.
Or you might get lucky and stumble on an aftermarket T56
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t5montecarlo
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Re: Converting the Slow-wagon to t-56

Post by t5montecarlo » Wed May 20, 2015 8:28 pm

The aftermarket T56 requires several updates to be dependable. They are not as good quality as the OEM F body T56. A friend bought one and it broke within a few days of installing it; one of the synchro keys fell out while at the track. It was behind his stock L69 305 in his 1986 MCSS.

The rebuild kit prices are staggering. It just realized it has been almost 20 years since I rebuilt a WC T5, but the premium kit was $165 and had absolutely everything in it.

For a flywheel, I got one from a junkyard for a 1986-1992 F body. There is a heavy and a lightened version; I happened to get the heavy version.

If you get a flywheel that needs to be cut, consider buying a new one. I have had a number of flywheels cut at different shops and every one resulted in clutch chatter. The one I got from a junkyard was in very good shape; I just sanded the surface, cleaned it, and installed it. Engagement is wonderfully smooth.

I bought a Hays street/strip disc and a parts store reman pressure plate in 1992 and am still using it. I specified 1978 Malibu with 350 for the pressure plate. It is likely the same pressure plate that fits many different applications, but my pedal pressure is much harder than a friend's car.

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Re: Converting the Slow-wagon to t-56

Post by Doober » Wed May 20, 2015 8:43 pm

Also, the TR6060 that's in the new Camaros, Mustangs, etc. use the T56 main case, but have different tailhousongs for the remote style shifters... I have yet to find some worthwhile info in one spot but I believe with an output shaft you can put the T56 housing on. Those are rated for 500-600lb.ft. depending on the ratios used.
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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Thu May 21, 2015 6:54 am

t5montecarlo wrote:For a flywheel, I got one from a junkyard for a 1986-1992 F body. There is a heavy and a lightened version; I happened to get the heavy version.

If you get a flywheel that needs to be cut, consider buying a new one. I have had a number of flywheels cut at different shops and every one resulted in clutch chatter. The one I got from a junkyard was in very good shape; I just sanded the surface, cleaned it, and installed it. Engagement is wonderfully smooth.

I bought a Hays street/strip disc and a parts store reman pressure plate in 1992 and am still using it. I specified 1978 Malibu with 350 for the pressure plate. It is likely the same pressure plate that fits many different applications, but my pedal pressure is much harder than a friend's car.

for the flywheel and clutch, i'd rather upgrade those while its all apart. i figure just get a new one, but im not sure if i should go with a 10.4" or an 11" clutch. will a 11" clutch fit with the t-56 bellhousing?
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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Re: Converting the Slow-wagon to t-56

Post by Doober » Thu May 21, 2015 11:32 am

I don't believe so, the F-Body flywheels are 153 tooth, never seen otherwise.
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'87 Fiero GT - 2.8/5-speed
'78 Malibu - Vortec 350/4-speed (for now)

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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Thu May 21, 2015 11:36 am

Thanks, I might as well stick with the stock size. Already found a few complete setups with everything between 1300-1600.
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Thu May 21, 2015 3:33 pm

put a deposit on a complete t-56 setup from a 97 camaro with 50,000 miles, pick it up the 30th
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Sat May 23, 2015 8:08 am

so, found out i need a special flywheel to adapt the t-56 to the older 2 piece rear main seal engine. this swap keeps adding up!!!

here are the choices i've found so far. anyone else know of anything available? preferably cheaper...

http://www.specclutch.com/conversion_combos/view/2" onclick="window.open(this.href);return false;

http://www.jegs.com/i/Centerforce/183/700107/10002/-1" onclick="window.open(this.href);return false;

http://www.jegs.com/i/RAM+Clutches/798/2555/10002/-1" onclick="window.open(this.href);return false;

i'm leaning to the spec one basically due to the price, but would i be better off with steel or billet aluminum?

im also trying to figure out if i should get the shifter relocation kit to move it forward so it doesn't interfere with the bench seat.

also just need a crossmember, and either have a driveshaft made or buy a whole new one. the one that Strange made for the 2 door is awesome
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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t5montecarlo
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Re: Converting the Slow-wagon to t-56

Post by t5montecarlo » Sat May 23, 2015 8:37 am

The T5 shifter absolutely interferes with the bench seat location, so I suspect the T56 will, tool. You also have an option to notch and reupholster the seat base.

What makes the T56 flywheel different? Is it thinner?

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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Sat May 23, 2015 11:39 am

From the looks of it I think it's actually thicker
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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Doober
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Re: Converting the Slow-wagon to t-56

Post by Doober » Sat May 23, 2015 12:51 pm

That's strange... I wonder if it has to do with the clutch setup being a little different. I'm wondering if it's possible to use the correct diameter/spline clutch disc for a T56 and use a stock G-Body flywheel/pressure plate with a hydraulic t/o bearing.

You could also send 388bu a message (not sure how often he's on) and see what he did, I know he used to have an SBC with a T56 but I don't know if it was 1 or 2pc.
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'92 Sierra - EBL/TBI-fed Vortec 383/700R4/3.08
'87 Fiero GT - 2.8/5-speed
'78 Malibu - Vortec 350/4-speed (for now)

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MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Thu May 28, 2015 7:48 am

there is sooo much information out there about these swaps and what people are using for parts, i'm actually sick of reading. once i pick up the parts on saturday, i'll figure out what i'll need to replace.
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

User avatar
MISFITmalibu63
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Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Sun May 31, 2015 3:47 pm

Well, got the transmission yesterday. Almost 500 miles round trip, saw an old friend, and stopped at White Castle. I'm going to replace the clutch, pressure plate, throwout bearing, flywheel and also might as well do the hydraulics at the same time. Kid couldn't find the shift as well, so he gave me a different one that will work until I find one that I like
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

User avatar
MISFITmalibu63
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Posts: 7164
Joined: Sat Feb 21, 2004 7:49 pm
Location: The Sticks... Tewksbury MA

Re: Converting the Slow-wagon to t-56

Post by MISFITmalibu63 » Wed Jun 10, 2015 8:44 am

i've picked up a few parts recently. grabbed a manual pedal setup, and swapped my john bzdel clutch pedal in. all is good except the bushings on the brake pedal need to be replaced, a little too worn for my liking. anyone know where i can pick these up?

i looked into a shifter relocation kit, and its $400!!! might just see how far back the stock location will be before i commit to it.

also found a way to "override" the electric solenoid for the reverse lockout.

I received the flywheel, 22 lbs of steel. it has weight bolted to the back, so im going to have to call spec and figure out if it should stay or go for my setup :roll:

i've been looking online, and i think i'll go with an upgraded "stock" clutch, seeing as how i don't plan to race this, and my engine doesn't make much more than the stock camaro setup.
Image
1979 Chevy C30 6bt Cummins, NV4500, NP205, 25,000 mile project
1980 Malibu Classic 460 BBC, th-350 3.73 strange S60....10.91 @ 122.62
1982 Malibu Station Wagon, 355, 200-4r, 3.42 8.5, 52,000 mile daily driver
2005 Chevy Silverado 2500 HD Extended cab, short bed, 4x4, 8ft plow
BREAK S#1T RACING!

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