71454Chevelle's T56 Magnum install [Archive] - Chevelle Tech

: 71454Chevelle's T56 Magnum install


72BB Nova
Jul 4th, 11, 11:48 PM
Hey guy's, I wanted to post this for my brother Darren since we've completed his T56 magnum install. It wasn't as bad as we first thought it was going to be. Before we did anything we checked driveline angle to see what we had starting out with. Next he pulled the motor and installed his new Center Force DFX clutch and New Quick Time bellhousing, and he did some other things to the motor while it was out. Got the motor back in, headers on, cooling system done, all wiring complete, now we're ready for the tranny. We cut the trans hump out and we used an engine hoist to help pick it, (akward and heavy). Once in place we tried to use the new crossmember he bought but it wasn't going to work out at all, wouldn't work with the exhaust and there was alot of transmission movement up and down,(springy). So we used his 4 speed crossmember and modified it, it worked perfect. Driveline angle was dead on. Next we had to modify the exhaust, the X pipe was hitting the crossmember because the crossmember now moved back about 6", so we lengthen between the headers and the X pipe and shorten between the X pipe and mufflers. I finished welding the exhaust up and put in an exhaust bung for his wide band thingy, (can't remember the full name )He got the driveshaft shortened and installed, finished everything up and now it's ready for a test drive. It was amazing how well everything worked on this thing, there was absolutely no issues with anything. Now for the floor, we used a trans hump patch panel that he bought and modified it to fit. I made the hump removeable so if he ever had to get into the shifter plate he wouldn't have to drop the trans, just pull up the carpet and remove the hump. I have alot of pics of this install from start to finished floor, hopefully Darren will post some pics of the finished product with carpet and seats installed. This transmission in my opinion totally changed the way his car drives. He can get it into 6th gear doing 60 MPH and it does very well, a very slight surge at that speed, but just ease the throttle a little bit and it cleans right up. The T56 magnum is a great shifting trans. Sorry for the loooooong winded post. Jeff

http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission001.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission005.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission008.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission035.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission037.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission041.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission043.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission045.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission063.jpg

72BB Nova
Jul 5th, 11, 12:01 AM
More pics
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission064.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission067.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission077.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission079.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission081.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission082.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission084.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission086.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission087.jpg

72BB Nova
Jul 5th, 11, 12:06 AM
And the last ones :D
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission088.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission090.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission091.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission094.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission095.jpg
http://i176.photobucket.com/albums/w171/72BBNova/DarrensTransmission096.jpg

Dean
Jul 5th, 11, 12:17 AM
Nice work!

Pipe vise looks familiar. :D


.

MarkP
Jul 5th, 11, 2:50 AM
Does Daren's car use a console?

69-CHVL
Jul 5th, 11, 8:20 AM
Nice work! What was the driveline angle?

71454Chevelle
Jul 5th, 11, 8:58 AM
Thanks Jeff! :thumbsup: I hadn't got around to posting the install yet. I'll try and post some additional photo's later today.

Does Daren's car use a console?

Mark..............No console, which probably made this install a lot simpler.

Nice work! What was the driveline angle?

Vince............Driveline angle ended up around 2.5 degrees down. Zero vibrations, the fastest I driven this so far (at a constant speed ;) ) is 85mph and all was well.

427L88
Jul 5th, 11, 9:45 AM
Nice work you Hoosiers!

69-CHVL
Jul 5th, 11, 9:51 AM
Darren, so what's the cruise rpm/mph in OD? Having that extra gear IMO is the game-changer when it comes to getting this motors to cruise good.

71454Chevelle
Jul 5th, 11, 10:18 AM
Nice work you Hoosiers!

Thanks Gene. I could not have done this swap without my brother Jeff. He's a very good fabricator and a perfectionist. :yes:

71454Chevelle
Jul 5th, 11, 10:50 AM
Darren, so what's the cruise rpm/mph in OD? Having that extra gear IMO is the game-changer when it comes to getting this motors to cruise good.

Vince,

I'm so glad I went with this tranny over the TKO. With the 2 overdrive gears, its very versatile which really helps with my setup. As you know I'm running a 4.30 rear gear with 30 inch diameter tires. I can start using 5th (.80 ratio) around 45mph. At this speed I'm turning a little over 1700 rpm. Every now and then I will get a very slight surge at this speed, speed up 1 or 2 mph and it goes away. 6th gear ( .63 ratio) can happen about 55mph (which is about 1650 rpm) and once again at a constant speed at this mph I will have a faint surge. By 60 mph (around 1800 rpm) its gone. 65 mph is 2k rpm. 70 mph is a little over 2100 rpm 80 mph is 2400. This thing is beautiful. The one thing that really surprises me about this setup is I didn't think my motor would like the low rpms in over drive. With a cam duration of 256 intake and 264 exhaust on a 108 lsa, I thought the OD gears (even 5th) would not be usable until higher speeds (well over 2k rpm). I was pleasantly surprise how well it works. Another surprise is the DFX clutch. IMO, its very streetable. Every now and then it will chatter a "little", but I can easily tailor my driving style to avoid it (slip it a little more).

Also as far as shifting goes this thing is awesome. Very short throws and very crisp. I thought I knew what a good shifting transmission was. My old Super T-10 had some modifications to the syncos performed by S-K Speed and shifted very well but it wont hold a candle to the T-56. :noway: My RPM shifting is a non-issue also. I have not done any speed shifting yet, but 6500+ rpm shifts (even 2nd to 3rd) were perfect.

Again, I'll try and get some additional photos posted soon.

kboorman
Jul 5th, 11, 1:42 PM
Very cool Darren. Did you go with a hydraulic or mechanical t/o bearing?

z27
Jul 5th, 11, 2:30 PM
NICE JOB DARREN! FIRST CLASS ALL THE WAY. WHERE DID YOU GET THE FORMED SHEET METAL OR DID YOU BEND IT YOURSELVES.:thumbsup::yes:ALEX

bzack
Jul 5th, 11, 4:00 PM
Nice to see another person install a Magnum, different approach than me, slightly more professional :p.

I love these transmissions though, big and heavy but amazing.

69-CHVL
Jul 5th, 11, 4:13 PM
Vince,

I'm so glad I went with this tranny over the TKO. With the 2 overdrive gears, its very versatile which really helps with my setup. As you know I'm running a 4.30 rear gear with 30 inch diameter tires. I can start using 5th (.80 ratio) around 45mph. At this speed I'm turning a little over 1700 rpm. Every now and then I will get a very slight surge at this speed, speed up 1 or 2 mph and it goes away. 6th gear ( .63 ratio) can happen about 55mph (which is about 1650 rpm) and once again at a constant speed at this mph I will have a faint surge. By 60 mph (around 1800 rpm) its gone. 65 mph is 2k rpm. 70 mph is a little over 2100 rpm 80 mph is 2400. This thing is beautiful. The one thing that really surprises me about this setup is I didn't think my motor would like the low rpms in over drive. With a cam duration of 256 intake and 264 exhaust on a 108 lsa, I thought the OD gears (even 5th) would not be usable until higher speeds (well over 2k rpm). I was pleasantly surprise how well it works. Another surprise is the DFX clutch. IMO, its very streetable. Every now and then it will chatter a "little", but I can easily tailor my driving style to avoid it (slip it a little more).

Also as far as shifting goes this thing is awesome. Very short throws and very crisp. I thought I knew what a good shifting transmission was. My old Super T-10 had some modifications to the syncos performed by S-K Speed and shifted very well but it wont hold a candle to the T-56. :noway: My RPM shifting is a non-issue also. I have not done any speed shifting yet, but 6500+ rpm shifts (even 2nd to 3rd) were perfect.

Again, I'll try and get some additional photos posted soon.

You'll find that very light throttle is where you get the surge, and just a little bit of gas clears it away. Kind of annoying if your just trying to maintain speed. But again having that extra gear will allow you to keep the rpms in a better spot. Now, could you imagine that trans w/o the .80 gear? I live that dream every day :(

71454Chevelle
Jul 5th, 11, 6:16 PM
Very cool Darren. Did you go with a hydraulic or mechanical t/o bearing?

Kirk,

I went with the mechanical clutch and the oem z-bar.

71454Chevelle
Jul 5th, 11, 6:36 PM
You'll find that very light throttle is where you get the surge, and just a little bit of gas clears it away. Kind of annoying if your just trying to maintain speed. But again having that extra gear will allow you to keep the rpms in a better spot. Now, could you imagine that trans w/o the .80 gear? I live that dream every day :(

Vince,

I've noticed that if I "VERY" lightly let off and get back into the throttle ever so slightly, (feathering) I can get around the slight surging. I can do this without even being noticed. I also installed a wideband and was playing with the jetting and air bleeds. Leaned it out abit so it didn't cruise quite so rich but it made the surging at lower engine speeds worse. Put it back so it would drive better at light throttle. Cruise is high 13's to around 14:1. Seems to be happiest there. I guess I'm only going to get so good with a carb.
If I would have gone with a TKO, it would have had the .82 OD. It would have turned more on the interstate, but would have been more utilized driving the way normally do (under 60 mph). It is surprising how quickly you get spoiled with an OD. Running around in 5th gear seems like it is buzzing it quite abit. :D

Just got back from an afternoon of cruising on a nice sunny afternoon. About 60 miles on the interstate traveling about 75 mph, a little stop & go in-town driving and about 60 miles driving thru the hilly, curvy back roads of southern Indiana. I was able to get a little over 12 mpg. :hurray: I don't think that's half bad considering the engine combo.

71454Chevelle
Jul 5th, 11, 9:25 PM
Here's a link to additional photo's.

http://s989.photobucket.com/home/71454Chevelle/index

-SS454-
Jul 6th, 11, 2:15 AM
Great thread with great pics! I think having the air gap dual plane is really helping the sub 2000 rpm cruising. I really think a ported Air-gap is a great intake for a moderately sized big block.

How much further back is the shifter location on the T56 than on a ST-10 or Muncie?

72BB Nova
Jul 6th, 11, 6:02 AM
Great thread with great pics! I think having the air gap dual plane is really helping the sub 2000 rpm cruising. I really think a ported Air-gap is a great intake for a moderately sized big block.

How much further back is the shifter location on the T56 than on a ST-10 or Muncie?

If I recall, I think the shifter moved backed about 2" but not positive.

71454Chevelle
Jul 6th, 11, 6:38 AM
Great thread with great pics! I think having the air gap dual plane is really helping the sub 2000 rpm cruising. I really think a ported Air-gap is a great intake for a moderately sized big block.

How much further back is the shifter location on the T56 than on a ST-10 or Muncie?

Chris..............I think 2 inches sounds about right on the shifter.

As far as the AirGap, I love this intake. When I was building the motor I sent it to Bryce at Dr J's Performance for full porting throughout the intake. On his flow bench in as-cast stock form, the average runner flow was around 310 cfm. After porting the average flow was just under 400cfm. Bryce does real nice work. Even with almost 500 ci, above 6500 rpm, power has not fallen off (pulls great to 6800 rpm).

MarkP
Jul 6th, 11, 12:12 PM
Darren,

Did you have to order a special bearing retainer that allows for the mechanical throw out bearing to slide on?

71454Chevelle
Jul 6th, 11, 3:31 PM
Darren,

Did you have to order a special bearing retainer that allows for the mechanical throw out bearing to slide on?

Mark,

Yes, I ordered it from D&D Performance. I believe it is a McCleod part though.

http://www.ddperformance.com/

JIM
Jul 6th, 11, 4:42 PM
:thumbsup: I love it!

-SS454-
Jul 7th, 11, 1:58 AM
Chris..............I think 2 inches sounds about right on the shifter.

As far as the AirGap, I love this intake. When I was building the motor I sent it to Bryce at Dr J's Performance for full porting throughout the intake. On his flow bench in as-cast stock form, the average runner flow was around 310 cfm. After porting the average flow was just under 400cfm. Bryce does real nice work. Even with almost 500 ci, above 6500 rpm, power has not fallen off (pulls great to 6800 rpm).

I think the 2 inches would be nice, because I find my M22W with hurst shifter to be too far forward. After reading a few posts about the Dr J's ported Air-Gap, I am completely sold for when I start buying parts for my 509 (assuming I build the funds).

70 SS 454
Jul 8th, 11, 12:12 AM
I live that dream every day :(

Ditto ..... LOL

Scotch
Jul 8th, 11, 12:34 PM
What RPM are you turning at 65-75 mph?

I've never experienced any surge in mine. It's a 383 SB w/ and AirGap and I've geared it so it's at 1,200-1,500 at 65-75, and it's fine there even with a big solid roller cam. Because it's happy, I get 20 mpg.

The T56 is the best transmission I've ever worked with. LOVE my RS Gear Son of Tranzilla.

71454Chevelle
Jul 8th, 11, 12:47 PM
What RPM are you turning at 65-75 mph?

I've never experienced any surge in mine. It's a 383 SB w/ and AirGap and I've geared it so it's at 1,200-1,500 at 65-75, and it's fine there even with a big solid roller cam. Because it's happy, I get 20 mpg.

The T56 is the best transmission I've ever worked with. LOVE my RS Gear Son of Tranzilla.

Scott,

65mph is just under 2k in 6th. 75mph is between 2200 and 2300.

Is the Son of Transzilla transmission comparable (strength wise) to the Tremec Magnum?

PUD'S BOY
Jul 24th, 11, 2:40 PM
If you don't mind me asking. What shifter is that? It looks like a good unit and fits exactly like I want mine to. I have the GTO shifter on mine and need to change to another to get it more forward.Yours looks like the direction to go. Great looking install.The ease of maintenance will be very handy a few thousand miles down the road.Thanks for posting your thread.

Aaron Walker

71454Chevelle
Jul 24th, 11, 3:10 PM
If you don't mind me asking. What shifter is that? It looks like a good unit and fits exactly like I want mine to. I have the GTO shifter on mine and need to change to another to get it more forward.Yours looks like the direction to go. Great looking install.The ease of maintenance will be very handy a few thousand miles down the road.Thanks for posting your thread.

Aaron Walker

Aaron,

The shifter "stub" coming out of the transmission is what came with the tranny and I did not move the shifter location. The shifter stick is just a Hurst 7.5 inch straight stick that was originally on my Super Shifter 3 from my Super T-10.

http://s989.photobucket.com/albums/af19/71454Chevelle/T56%20Magnum%20Install/?action=view&current=IMG00096-20110602-2148.jpg

PUD'S BOY
Jul 25th, 11, 1:19 AM
thanks....... im doing the same with the hurst ****er...looks good.

Aaron

BigBlockPaulie
Mar 4th, 12, 2:42 PM
Wow, Jeff great work, good pictures, nice car Darren. I settled on a T-56 too, now to fab for it.

Paulie

cuisinartvette
Mar 4th, 12, 4:16 PM
nice write up

found that a 250@.050 cam on 110 worked perfect with 6th pulls it fine.
260@050 well lol not so much. Cruises in 5th where its happy though. Some surge could still be lean though.

Similar build as Scotches 4.11 26 in tire

Good move on raising the floor. I didnt, it clears but is very tight. removing the trans is a royal pita pulling it back it hits the tunnel.

Once you use this type of trans youll never go back to the old linkage style again specially with teh hydraulic clutch. They are fantastic.

Enjoy :beers:


To anyone else considering the swap its the best upgrade youll ever do 100% worth it.

Scotch
Mar 4th, 12, 8:52 PM
Scott,

65mph is just under 2k in 6th. 75mph is between 2200 and 2300.

Is the Son of Transzilla transmission comparable (strength wise) to the Tremec Magnum?

http://rsgear.com/products/transmissions/race-performance/dodge-viper.aspx

I'm sure they're comparable.

cuisinartvette
Mar 4th, 12, 11:21 PM
Scotch what headers are you running how do you like them?

Scotch
Mar 5th, 12, 12:28 PM
Scotch what headers are you running how do you like them?

I had Hedman shorties (3/4 length) for the last 3 yrs and have been fighting plug clearance/heat issues. I went to Accel shorty plugs and MSD boot covers (socks) on the wire boots and still had issues. Plus- I had to pull the header (loosen the flange bolts) to change plugs. Not ideal.

So, I did some research and went with Doug's Tri-Ys. Plenty of plug access and ground clearance. They weren't cheap, but they fit really nicely. I did have to modify them a bit to clear the hydraulic slave cylinder on the LT1 bellhousing though. It wasn't a big deal and now I have about 1/2-inch of air between them, so I'm not worried about it. I had an X-pipe fabricated and then got the new headers/X-pipe all tied into the rest of the existing (Flowmaster American Thunder 2.5-inch) exhaust system, which dumps after the mufflers. Now it's tight and right- plenty of ground clearance, good flow, plug access, and it sounds pretty cool too.

Tri-Ys were the way to go for me, but (like any header, probably) you'll have to keep an eye on clearance around the clutch hydraulics.

SS Shaun
Mar 5th, 12, 12:49 PM
great job on that tunnel! makes me scared to see what i am going to have to do with mine!

71454Chevelle
Mar 7th, 12, 7:03 AM
great job on that tunnel! makes me scared to see what i am going to have to do with mine!

Shaun,

If you have some fabrication ability or access to someone that does, it's not too bad of a swap. I was very lucky with my brother Jeff, who is a pretty good fabricator, but he is also a perfectionist. The swap was time consuming.

At the time I purchased my transmission, Jeff also purchased one to install in his 72 Nova that he is working on. He used my swap as a "test bed" for his. Learn what works and what doesn't. Also, when I started my install it seemed like there was not alot of information out there for a T-56 Magnum into a Chevelle. Lots of TKO info, but not as much for the 6 speed. To help others I put together a list of the components that I used. Hopefully this will help you and others:

List of parts:
T-56 Magnum Transmission $2800 (I paid $2375 with Summit discount )
http://www.summitracing.com/parts/CMG-TUET11009/
Quicktime BH: $650 (This is when using oem z-bar linkage)
http://www.summitracing.com/parts/QTI-RM-6023PB/
This is the adjustable pivot ball I using in the bellhousing. It was too long, so I had to cut some length off. http://www.summitracing.com/parts/MCL-16908/
Clutch Fork:
http://www.jegs.com/i/JEGS+Performance+Products/555/60102/10002/-1).
Centerforce DFX Clutch and TO bearing: $400
http://www.summitracing.com/parts/CTF-01148552/
http://www.summitracing.com/parts/CTF-N1716/
Flywheel (already was running this with my Super T-10)
http://www.summitracing.com/parts/CTF-700120/
T.O. Bearing collar: $200 (got it from here: http://www.ddperformance.com/ Specify LS style tranny with a standard GM TO bearing)
Cable-X Speedometer converter box: $300
http://www.abbott-tach.com/cablex.htm
1350 yoke: $150
http://www.summitracing.com/parts/IED-SY-C6-1350/
Shifter handle (I reused my Hurst stick that I had been using on my Super T-10)
Misc parts (electrical connectors (3), speedometer plug): $120 (I got some misc stuff from here) http://www.5speedtransmissions.com/6_speed_prices.html
Crossmember: Reused oem but modified (see photos in this thread)
Driveshaft: shorten about 6.5 inches, 2 new 1350 Spicer joints, balanced (local $125)
Possible exhaust mods (I have an X-pipe that needed moved back. Jeff modded this for me.)
Sheetmetal material for tunnel mods

duramaxdarren
Sep 22nd, 12, 3:39 AM
darren i think we need to become close friends lol. we share a name and a 71 chevelle. how often does that happen? i see you have the t56, i wish it was available when i put my tko in. i run a 4:11 gear. in 5th at 75 its close to 3k. its alright though i cant complain but if i had the chance id go t56 after reading your posts and seeing your pics, impressive my friend. i see the msd is the same spot as mine...seemed like the only spot that made sense..love the pic with the tremec box in the trunk...truly the way i work as well. i didnt have to modify my crossmember..is the t56 longer i imagine? nice exhaust too. i ran 3" myself but no crossover. i wonder if my trans isnt high enough in the car? my exhaust is low to the ground i mean low that my v band clamps at the collector scrapes sometimes over rolling bumps. anywways love to talk to and chat with myself about our cars

Nebogloza24
Nov 18th, 13, 12:54 PM
Would this sawp work with a bench seat or is buckets required

Sent from AutoGuide.com Free App (http://www.autoguide.com/mobile)

71454Chevelle
Jan 1st, 14, 7:35 AM
I have no idea, but my guess would be yes since the Magnum has 3 shifter locations and I have mine in the rear-most position. :yes:

http://i989.photobucket.com/albums/af19/71454Chevelle/T56%20Magnum%20Install/IMG00096-20110602-2148.jpg (http://s989.photobucket.com/user/71454Chevelle/media/T56%20Magnum%20Install/IMG00096-20110602-2148.jpg.html)

http://i989.photobucket.com/albums/af19/71454Chevelle/T56%20Magnum%20Install/IMG00120-20110705-1432.jpg (http://s989.photobucket.com/user/71454Chevelle/media/T56%20Magnum%20Install/IMG00120-20110705-1432.jpg.html)

http://i989.photobucket.com/albums/af19/71454Chevelle/T56%20Magnum%20Install/IMG00123-20110705-1432.jpg (http://s989.photobucket.com/user/71454Chevelle/media/T56%20Magnum%20Install/IMG00123-20110705-1432.jpg.html)

http://i989.photobucket.com/albums/af19/71454Chevelle/T56%20Magnum%20Install/IMG00119-20110705-1431.jpg (http://s989.photobucket.com/user/71454Chevelle/media/T56%20Magnum%20Install/IMG00119-20110705-1431.jpg.html)