C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

T-56 vs 4+3 shifter placement

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Old 06-04-2011, 11:14 AM
  #21  
cv67
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Pretty sure the shifter is an avg of 3 in farther back not sure how far over.


There was someone who posted up a week or so ago about thiers they made. Cant find it.


On the LT1 PP it may come with bolts hopefully, the GM LT1 bolts are NLA
ARP lists a # but it is for a LS1 dont buy it.

McCleod is getting a ton made for themselves, its a special bolt do NOT use some hardware type bolt youll regret it. They may have them in stock need to order some.
Old 06-04-2011, 05:31 PM
  #22  
87bob
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Originally Posted by dclafleur
I'm doing mine this winter too, I tend to take my car apart at the beginning of November, I think I've had it in pieces every year for the last four years. One of the key issues we face is that we have a two piece rear main seal which means we need a special flywheel. So far I've seen centerforce, spec, ram and maybe mcleod offer a 153 tooth flywheel for an 11" clutch that will mount to an engine with a 2 piece rear main seal.
Results

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It is my understanding that you can use your Factory Flywheel, your Factory Pressure Plate and your Factory Clutch Disk with the Mcleod Throwout Bearing Part Number 1400-22. I am waiting to hear back from Red at McLeod verifying this. I will qualify this and say this is for a swap in a an 87 Corvette using a T-56 with the LT-1 Bell Housing. The McLeod Throwout Bearing is adjustable. And from recollection is to be set with .100 clearance from the pressure plate fingers. From my previous conversation with him I recall him saying that this throwout bearing has set screws that lock it in place on the nose of the output shaft of the transmission.

Iformation from the McLeod website:

The 1400 series slip on bearing is intended to slip over your existing bearing retainer when your "A" dimension is greater than 3". These bearings are made of the finest hard anodized billet aluminum, along with quality elbow swivel fittings and high pressure stainless steel braided lines. These high quality components make the Mcleod slip on hydraulic throw out bearing extremely durable, and the best in the market today! These assemblies may be used to eliminate the need to fabricate complex clutch linkage when swapping transmissions.

Kit Includes: Internal Bearing/Slave cylinder assembly with (2) 11" stainless steel braided lines, (1) for bleeding (1) for input.

Note: Installation Instructions are listed under the pics & video tab listed below.

There is more on the web site! I did down load the install instructions and it spells out the process. It looks like it would work to convert any pull style to push style provided the diameter of the pressure plate fingers are the right diameter for the bearing and the trans collar is the diameter for the i.d. of the throwout bearing.

Last edited by 87bob; 06-04-2011 at 05:57 PM.
Old 06-06-2011, 08:12 AM
  #23  
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I just wanted to add a little more knowledge to this thread. I've found another flywheel option which I've seen priced lower than the Centerforce or RAAm flywheels.

The Spec SC66s will go behind a two piece rear main seal and is designed for T56 conversions. The person I've been in contact with at Spec also indicated that it would work with a stock LT1 style clutch. There's also an aluminum version for those who want a lighter flywheel.
Old 06-06-2011, 09:43 AM
  #24  
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Guys I don't want to complain but I still haven't got what I need from this post. I understand the stock loaction of the shifter is to the left and rear of where the T-56 shifter comes up. I just don't know how much. So I'm still looking for someone who has done the swap to jump in.
Old 06-06-2011, 11:34 AM
  #25  
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This thread seems to indicate the shifter position between a ZF6 and a T56 is really close, I wonder if there was a difference in the console for an '89 with a manual transmission compared to a 4+3 console. I'll be at a show this weekend with corvettes, I'll bring a tape measure and see if I can measure my buddies '89 out.

http://forums.corvetteforum.com/c4-t...-searched.html
Old 06-06-2011, 09:42 PM
  #26  
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Originally Posted by 87bob
Guys I don't want to complain but I still haven't got what I need from this post. I understand the stock loaction of the shifter is to the left and rear of where the T-56 shifter comes up. I just don't know how much. So I'm still looking for someone who has done the swap to jump in.
87Bob, I really wish I could help you with this one. You have been a big help with my questions. Out of necessity i am going to have to do this swap next month. If you haven't done yours by then I will post the measurements I use. I would think someone has done this swap by now, hopefully they will chime in.
Old 06-20-2011, 09:31 AM
  #27  
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Default My decision.........

I decided to go ahead with the swap and cutout the trans tunnel yeasterday. Since the car is on a lift I am going to mock up the install. I plan to use a empty engine block with the T-56 mounted to it. This way I can get it in place and then measure where the orginal shifter came up and center the new shifter left to right and front to back in the opening. Anyone monitoring this thread wanting pictures please respond and let me know.
Bob
Old 06-20-2011, 09:37 AM
  #28  
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I do! I'm still gathering pieces for my swap so I'll add this to the list.
Old 06-20-2011, 09:47 AM
  #29  
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Originally Posted by dclafleur
I do! I'm still gathering pieces for my swap so I'll add this to the list.
I will have pictures posted later. I have removed the 4+3 shifter assembly and the the bump in the trans tunnel for it. It went fairly easy I am also going to post the tools I used to cut it out. On the vibrating saw shown in the tool picture, I used a wood cutting blade. The fiberglass and metal reinforcements wore them extremely fast but it was what I had on hand.

UPDATE: Here are some pictures sorry about the blury one of the tools:







I have not cut the hole in the trans tunnel top for the T-56 shifter yet. Since I have the car on a lift I'll put a bare block in front of the T-56 and install them in the car. From that I can determine the proper placement of the hole for the factory location of the T-56 shifter stub. Then I can accurately measure for the offset. By doing it this way I hope to keep the patch pannel as small as possible. Also the bracket to join the "C" channel and the back of the trans does not come with holes in it. While I have everything mocked up I can mark them as well. Pull everything out drill and my holes. Updates to follow.

Last edited by 87bob; 06-20-2011 at 03:17 PM. Reason: adding pictures
Old 06-20-2011, 03:19 PM
  #30  
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Here is a photo of the block and tranny. 350 small block and T-56 trans.


Last edited by 87bob; 06-21-2011 at 07:51 AM. Reason: more info
Old 06-21-2011, 07:52 AM
  #31  
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Ttt
Old 06-21-2011, 03:46 PM
  #32  
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I am definitely keeping my eyes on this thread. Still waiting for a T56 so I can start my swap. Thanks for the updates and pictures!
Old 06-24-2011, 05:55 PM
  #33  
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Originally Posted by 87bob
Here is a photo of the block and tranny. 350 small block and T-56 trans.

Ha! The block looks tiny next to the transmission! These things are huge!
Old 07-14-2011, 08:09 PM
  #34  
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Bob? Bob?

Where did ya go? I got my 4+3 hump cut out and I need (well, it would really help) to know where the T56 hole is gonna go.

Old 07-15-2011, 08:52 AM
  #35  
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Originally Posted by DanZ51
Bob? Bob?

Where did ya go? I got my 4+3 hump cut out and I need (well, it would really help) to know where the T56 hole is gonna go.

I have been busy with work and honey doo's the trans and block are sitting in the same place as in the photo.
Old 07-31-2011, 09:45 PM
  #36  
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I posted on one of the other T56 threads. I post it here too, beings me and 87bob are close as far as progress goes.

Here is my trans tunnel after I fiberglassed the 4+3 shifter hole.


I sprayed the fiberglass patch with some rubberized undercoating. Here looking up at the tunnel is where the shift tower came to when I trial fitted it.


Another picture of the same.


Here's a view from the driver's seat. I 'glassed over the entire 4+3 hole, then made my new cut (for the t56 tower) from below.


As I write this I've just bolted the T56 in and it looks good! I've got alot more to do (tomorrow).
Old 08-01-2011, 08:26 AM
  #37  
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Default http://i38.photobucket.com/albums/e103/87bob/0602sr_15_zsix_speed_transmissionshifter

From your pictures I assume you are going to re-locate your shifter to the center of the console. I'd like to keep mine in the stock location which is to the left of center. Can you tell me what the difference is from where it comes up now to the stock location? I had heard that is it one inch forward and one and a half inch to the right of the stock location. McLeod makes a shifter with many availible off sets. Here is a link.

http://www.mcleodracing.com/products...TKO%2A2057.mcl

Here is a photo of some of the offsets

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Old 08-01-2011, 03:21 PM
  #38  
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A little more work today on the project. When I came home a surprise was waiting for me.



$150 brand new Hurst, with ****, and short shaft, with the shipping from Zchris off fleabay. Email said he was out-of-office for another week, so it was a pleasant surprise not waiting.

Now for a trial fit:


I need to trim just a little at the base, 'cause the Hurst tower is so offset on the base plate.


Here it is with the console just sitting on it and the lever pulled back into 4th gear (so the console is actually 1/2" further back than it will installed).


Here it is with the shifter in 3rd.


So for measurements? Right now I don't think I want much further back (maybe just 1/2" for the bracket) and no more than 2" over towards the driver. I don't see where someone would offset the shifter back much at all, I think those numbers must come from T5 conversions, not T56. My Hurst can have the shifter bolted to either side so I have a 1/2" leeway.

My grubby paw..


back to work
Old 08-01-2011, 03:37 PM
  #39  
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All I can say is wow. That does not look bad at all. I'm about ready to dry fit my T-56. Yours looks near perfect with out any real adjustments. Where did you buy your shifter and **** from?
Old 08-01-2011, 08:35 PM
  #40  
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It looks like it is a little bit further back than my T5 conversion. Glad you guys are doing this one - this may be my next step one day.

Here is where the T5 came up.


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