Will a LT1 T-56 work with a LQ9/4 block???

**D_blaze** · 12-21-2007, 08:23 PM

I have a Black 2 door 2000 s-10 Blaze with a 96 .040 over lt1 with ported and polished alum heads with 2.02 1.60 oversized stanless valves, high lift double valvesprings, Steel 1.52 roller rockers with a 502 lift 274 dir @ .50 cam, port matched intake with a twin 58mm throttlebody. It has a T-56 sixspeed trans with a 8.6 rear with a eaton p-track and 4.11's.

I am going to try and build a 500+RWHP lq9/4 to put in D_Blaze. And I need some advice to get that motor built and built right. I heard the is the place to go!!!

I have a 96 t-56 six speed, does anyone know if it will work with a lq9/4 and what flywheel would i use??? Any info is helpful. Thanks Dan

**Firebirdjones** · 12-22-2007, 05:22 AM

Nope,,,,bolt pattern is different on bellhousing/block,,,and the clutch setups are different as well.

One is a push system and the other is a pull system. I believe you will need to hunt down a T-56 for an LS series engine,,,as well as a new clutch setup.

**D_blaze** · 12-22-2007, 02:25 PM

Nope,,,,bolt pattern is different on bellhousing/block,,,and the clutch setups are different as well.

I was under the understanding that there was only one bolt hole that wouldn't line up with the LT1 bellhousing and LQ9/4 block. Is this true?? If this is so couldnt i drill and tap a new hole?? I heard about the input shaft being the thing that would be hard to make work but I talked to a local trans shop and they said they could put in a LS1 style input shaft in my LT1 trans. I kinda like the fork setup on the LT1 trans. Will the LT1 Flywheel bolt to the LQ9/4 crank??

Thanks Dan

**Firebirdjones** · 12-22-2007, 02:45 PM

I don't believe the flywheels are interchangable.

The bellhousing is more than 1 bolt different,,,,the LS engine has a series of bolts nearly all the way around, (9 bolts I believe if memory serves). The LT1 still mimics the old school gen 1 engine with 6 bolts.

Yes you can change the input shaft,,,since it is different between LS1 and LT1,,,,as you have found,,,the clutch setup is different, (push verses pull) which requires a different input shaft.
Changing it would require a near complete tear down of the trans. At that point you can simply swap out the LT1 bellhousing for an LS1 bellhousing,,,as they just bolt to the transmission case.

I hope my memory has served me here,,,as I have been rebuilding muncies lately,,,been a while since I have been into a 6 speed.

**D_blaze** · 12-24-2007, 03:57 PM

Ok Thanks for the info I will do some more looking around and see what i can come up with.

**D_blaze** · 12-27-2007, 03:17 PM

Anyone know where i can get a good cheep gen III t-56 bell housing?

**D_blaze** · 12-27-2007, 03:36 PM

Originally Posted by Firebirdjones

I don't believe the flywheels are interchangable.

The bellhousing is more than 1 bolt different,,,,the LS engine has a series of bolts nearly all the way around, (9 bolts I believe if memory serves). The LT1 still mimics the old school gen 1 engine with 6 bolts.

Yes you can change the input shaft,,,since it is different between LS1 and LT1,,,,as you have found,,,the clutch setup is different, (push verses pull) which requires a different input shaft.
Changing it would require a near complete tear down of the trans. At that point you can simply swap out the LT1 bellhousing for an LS1 bellhousing,,,as they just bolt to the transmission case.

So I think I would HAVE to use the new style clutch with the new bellhousing. Will that work with the front of the old t-56? Does the new slave run on the input shaft or against the trans??? Is the clutch, bellhousing, and input shaft the only differances between the LT1 and LS T-56's??

Thanks for all your help.

**Firebirdjones** · 12-28-2007, 01:37 PM

Originally Posted by D_blaze

So I think I would HAVE to use the new style clutch with the new bellhousing. Will that work with the front of the old t-56? Does the new slave run on the input shaft or against the trans??? Is the clutch, bellhousing, and input shaft the only differances between the LT1 and LS T-56's??

Thanks for all your help.

I believe the clutch, bellhousing, and input shaft are the only differences. Of course you will need the fork/throwout bearing and slave cylinder setup as well I think.