Heres the deal I just blew my 4l60 so want to get a manual which one would be better in my 1993 z28?
And if anyone knows what is the diffrence between a hydraulic clutch and the other type? Which one is better

 

All of the vehicles you listed have hydraulic clutches. The other types of trannies use a cable (tremec, Richmond, etc.)
There are differences between the LT1 and LS1 trannies. The Lt1 is a pull type and the LS1 is a push type. I think the spline count on the input shaft is different as well. Not sure about if the LS1 T56 and LT1 T56 are interchangeable.

Good question. Would like to know myself.

 

Depends on your rear gearing you have now. The 93's had two T56's. Cars with 2:73 rears got the M28 and cars with 3:23's got the M29. Both of these T56's are geared "steeper" the 94 and up's. My 3:23 car runs like a auto car with 3:73's....food for thought!!!

 

If you are looking for a direct bolt-in replacement for your 1993, the LT1 T56 is the only one that will work. You can install an LS1 or a Viper T56 using the McLeod SFI-rated "universal" bell housing. But you are now talking some substantial $$$$.

The LS1 as noted in the post above uses a conventional "pusher style" clutch.... the throwout bearing is pushed forward on the input shaft to release the clutch. The T/O bearing is moved by the hydraulic "slave" cylinder, which is bolted to the front cover plate on the tranny.

The LT1 uses a "pullbak" style clutch, meaning the T/O bearing moves backward on the input shft to release the clutch. The T/O bearing is moved by a clutch "fork" that is mounted on a ball on the front cover of the T56. A hydraulic slave cylinder moves the fork. The slave clinder is bolted to the bell housing....

And, the LS1 has a longer input shaft, necessitating a different bell housing length. Hence the use of the McLeod "universal" adapter bell housing.

The Viper T56 has a larger diameter input shaft, and I believe the shifter location is further back on the tranny, meaning it wouldn be in the correct position for a 4th Gen interior. The McLeod would let you bolt the Viper T56 to the LT1 engine, and there may be an option on changing out the shifter.

There's nothing here that can't be adapted or altered in some way.... just depends how much groundbreaking development work you want to do, and how much money you want to spend. I think Taner was able to take his LT1 T56 into the mid-9's with a few minor upgrades, so there is really nothing wrong with the LT1 T56 unless you start producing outrageous HP.

 

Well thanks for the replies guys, so Injuneer ur saying any t56 93-97 will bolt up right? As far as shifting how fast can u shift those lt1 t56s, because I really want to powershift, and what clutch do you guys recommend for a car with about 450 hp ? The spec stage 4?

 

The Viper shifter is further forward, I believe - I think it sits in the rectangular hole on the main case, which is just covered by a block-off plate on the F-body T56 (this is where the CAGS solenoid, internal gate, and detent-ball assembly are located).

If you want to use the stock F-body shifter location on a Viper trans, you'll need to swap to the F-body tailshaft housing. But, the Viper uses a larger mainshaft (which forms the output shaft), and so you need to machine out the tailshaft housing to accomodate the bushing and seal. You'll also need to hack about 3/4" off the Viper mainshaft.

All in all, it's probably easiest to buy a '93-'97 trans for the LT1 and upgrade it to the Viper mainshaft, upgrading the 3-4 shift fork and blocking rings along the way (some people also think that going to billet synchro keys is a worth-while upgrade, but I'm still running the stock stamped keys in my trans). That's basically what I'm running in my car right now, and it seems to be pretty tough. I did start with an LS1 T56 because the price was very right, but ended up just swapping over to the LT1 midplate, bellhousing, and input shaft (this was before the McLedo bellhousing became available).

How fast can you shift them? Well, the stock blocking rings are OK when cold, but start causing problems as they get warmer. That's where the carbon-composite blocking rings are nice - they're a bit slower when the transmission is cold, but much better as the fluid gets hotter. It's like the difference between organic and metallic brake pads. I'm not sure how that affects drag racing, because I'm more concerned about running in the twisties.

As far as the clutch goes, I like my McLeod Street Twin. It was a bit of a bear when new, but is now behaving very well.

 

The easiest way to go is certainly the LT1 style T56 with the pull clutch. I'm just now finishing the conversion of my LT1 T56 with pull clutch to an true Mcleod blowproof bell housing with the GM aftermarket style T56. This combo puts the shifter back in its original location, changes the clutch over to a long finger push style. This conversion is some substantial $$$ but will allow me to run a soft loc PP with iron disk, and have an SFI approved system.

Steve

 

ok cool where can I buy this Mcleoud bellhousing?

 

>So this McCleod SFI bell housing will bolt up to my 1994 Z28 with a 6 speed ?
I also would like to know where to get this .

 

http://www.mcleodind.com/

or you can try thunderracing.com

 

Any distributor that sells McLeod products should be able to get it for you. You might want to look over the notes on the catalog page, because it appears that they are only using the LS1 style pusher clutch, the longer LS1 input shaft, etc.

McLeod Modular Bell Housing

 

Fred is probably correct in that the new modular system is ready for the LS1 style system only. My conversion is not using the new modular system. I'm using the good old reliable standard off the shelf Mcleod housing with a D&D performance "GM aftermarket style" T56. This puts every thing back where it's supposed to be.The conversion is not for the faint of heart (or someone on a budget). Would probably only make sense for a regular bracket racer who really wants to go to a standard clutch arrangement and is skeerd of blowing off their tootsies (like me). I can post all of the details (PN's etc) of the conversion if anyone is really interested. I'm 95% complete (as in every thing fits) and won't have the system tested until March.

 

Ok guys thanks for your time, but Im a little confused since my tranny knowledge is limited. So should I get the lt1 t56 or the ls1?
Im going to be pushing around 450 hp max and I have about $2500 dollars to spend on the complete tranny.

 

And what do you think about buying one from a junk yard and just changing some parts in it ?