Can I use an LS1 T56 in my 91 Z28 if I swap the bellhousing off of an LT1? What about flywheels? I'm looking to put a 6 speed in my car but not sure where I can find one or even which one would be better...
Thanks,
Adam

 

No, the input shaft and clutch setup is different on LS1s. It may be able to be done, but not without a lot of $$$$ in fabrication and/or replacing parts. The LT1 T56 is a direct bolt in with LT1 T56 hydraulics and a Spohn or Skulte crossmember.

 

I also belive the bellhousing is different too.
Chris

 

Bellhousing, clutch setup, tranny front cover, and input shaft are all different. The input shaft alone costs almost $400 new, so unless the LS1 tranny is free it's probably not worth it.

 

Can't you use the clutch setup from your first gen (oops ment third) with the T-56 if it's hydrolic?

 

First gen's had mechanical clutches. Most 3rd gens have hydro clutches, but the mainline (goes from master cyl to slave cyl) isn't long enough to use with a T-56. The T-5 slave mounts from the front and the T-56 slave mounts from the rear (to accomodate the pull-style clutch.) And the LS1 hydros are totally different...the slave cylinder mounts to the tranny front cover, around the input shaft. The throwout bearing is built into it. The LS1 hydros have 2 lines from the master to the slave, whereas the T-5 and LT1 style T-56 hydros only have one.

 

So there is no way to use the 3rd gen clutch? Ithough I heard of someone who did, can you instead just get a new slave cylinder with the longer hose?

 

bump

 

thank you all for the much needed help!!!!!!!!!
Adam

 

Nope, not gonna happen. Unless maybe you find a used one and/or do some fab work on a used one or make one from scratch. GM only sells the hydraulics as a pre-bled one-piece master/slave/reservoir/hydraulic line assembly. You can use the thirdgen pedals though.....

 

Matt is correct, they only come from GM complete and pre-bled, for a little over $100. However, if you are lucky enough to find someone who has had to replace their hydros (due to a leaky master cylinder or something) then the line can be swapped with a very small amount of "massaging" with a file. The mainline is held onto the master and slave cylinders with a roll pin...punch the pin out and remove the lines and compare them. You will see that the only difference in the fittings is that the T-56 line has a ridge about 1/8" wide and less than 1/16" high around the tip of the fitting. File it off and it fits the T-5 master/slave perfectly. Make sure you use the T-5 slave though, because you'll have to bleed the clutch when you get done and the T-56 slave has no bleeder valve.

 

T-56 has no bleeder valve? WTF I don't want to t-56 setup if thats the case. I think I might be fabing up my own if I have to

 

They say you can bleed the air bubbles up through the system by unbolting the slave and pumping it in and out.....didn't sound too good to me so I stuck a T-5 slave on my T-56 hydros. That's how I found out about the difference in the line fittings. It's been a year and a half and I haven't had a problem with it yet.

 

It does sound goofy, but you can even leave the slave mounted and pump it in and out (by depressing the pedal that is) at varying rates and it will eventually bleed out. I doubted it myself when I heard about it but I have done it a few times and it will work. I have even used this on systems that have bleeders that get stuck or just won't bleed out the normal way..... The trick is to try to get as much fluid down into the line and slave before you start with the pumping...