lt1 t56 to ls different conversion option
lt1 t56 to ls different conversion option Ive read all the stuff on swapping input shafts and front plate etc, but im wondering am i missing something on why you cant run a flywheel spacer like the automatic guys do and a longer pilot bearing to be able to run the lt stuff as is?
Or is the gap way too much? Just figure guys run old style 4spds behind ls engines without too much trouble so there must be a way.
Or is the gap way too much? Just figure guys run old style 4spds behind ls engines without too much trouble so there must be a way.
Last edited by kballs; Feb 13, 2015 at 12:11 PM.
Staging Lane
Joined: Jan 2012
Posts: 56
Likes: 0
From: Santa Rosa, Ca
PN for the LS3 pilot bearing? Thanks in advance!
Staging Lane
Joined: May 2013
Posts: 67
Likes: 0
From: Rochester NY
There is a bushing and an actual bearing you can use... I went with the bearing option, let me try and find the P/N. Ill PM you if I can find it.
Ive read all the stuff on swapping input shafts and front plate etc, but im wondering am i missing something on why you cant run a flywheel spacer like the automatic guys do and a longer pilot bearing to be able to run the lt stuff as is?
Or is the gap way too much? Just figure guys run old style 4spds behind ls engines without too much trouble so there must be a way.
Or is the gap way too much? Just figure guys run old style 4spds behind ls engines without too much trouble so there must be a way.
Flywheel spacers are bad for starter engagement. Even 0.100"
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Staging Lane
Joined: Oct 2014
Posts: 80
Likes: 0
From: Littleton, CO
It's just like a 4 speed swap, it isn't rocket surgery. LS3 pilot bearing (larger sealed bearing that goes into the first register of the crank) for 4 speeds, TKOs, Richmond 5/6s, LT1 T56s, and later TR6060s, 4th gen camaro/traditional small block chevy pilot bearing or bushing for the longer LS1 input t56.
I'm not sure where the need to space the flywheel is coming from, the clutch should still be able to ride fine on the input shaft as the additional length is past the clutch disc, it might ride in a different spot on the input shaft than the LT1 clutch did but that's not the end of the world.
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On The Tree
Joined: Nov 2012
Posts: 152
Likes: 0
I bought an LT1 T56 in hopes of converting it for the LS and I called Tick performance before I bought it. They said the T56 from a 94 f-body is one of the most sought after. Not sure why though.
Launching!
Joined: Jun 2012
Posts: 244
Likes: 0
From: Huntersville NC
93 actually. It had a shorter 5th gear which is better for the track. At track days, my 97 with a 396 would fall on its face in 5th gear. Too tall.
Launching!
Joined: Jun 2012
Posts: 244
Likes: 0
From: Huntersville NC
What's wring with the pull style clutch? An honest question.
It just seems like there isn't the same aftermarket clutch support out there for the pull style clutch . I'll have to do so searching , but I'm fairly positive the first year, 93 t56 was rated for less torque then the 94+ t56 with the different gear ratios.
https://ls1tech.com/forums/lt1-lt4-m...ear-ratio.html
http://www.thirdgen.org/forums/trans...-1993-t56.html
https://ls1tech.com/forums/lt1-lt4-m...ear-ratio.html
http://www.thirdgen.org/forums/trans...-1993-t56.html
Staging Lane
Joined: Oct 2014
Posts: 80
Likes: 0
From: Littleton, CO
Realistically, I don't see why you could not just take the 5-6 gears from a 93 box and put them in a 94+ for a closer ratio transmission. It'd have to be the 5-6 pair to work though.
On The Tree
Joined: May 2021
Posts: 113
Likes: 78
From: Walton NY
Digging up an old thread here, but I have an LT1 T56 and a 4.8 I'd like to mate. Is this confirmed that the LT1 clutch and slave with an LS flywheel and LS3 pilot bearing works together? I'm fine with missing one bolt on the bellhousing.
On The Tree
Joined: May 2021
Posts: 113
Likes: 78
From: Walton NY
I did some homework on this, and it doesn't look like it will work. LT1 input shaft works with the truck pilot, but the ls1 flywheel isn't the correct bolt pattern for the LT1 clutch, and the bellhousing isn't physically big enough for the ls1 flywheel. Maybe you could clearance cut it and redrill/order an LS flywheel with the pattern for the LT1 clutch, but at that point you're probably better off just changing the input shaft, bellhousing and front plate to convert it to LS1 style.
TECH Regular
Joined: Mar 2015
Posts: 487
Likes: 10
There is a thread here somewhere about using SBC transmission options with an LS. I believe (will link the thread when I find it) you can use a BBC flywheel and clutch (with the correct spline count for the given transmission) and then use the hydraulic TOB kits that t10 guys are using to convert to the LS style.
Here is the link :
https://ls1tech.com/forums/conversio...-ls-motor.html
Here is the link :
https://ls1tech.com/forums/conversio...-ls-motor.html
On The Tree
Joined: May 2021
Posts: 113
Likes: 78
From: Walton NY
Teddy, thanks. I read that a couple weeks ago. The LT1 T56 has a short input shaft though. It won't reach with an old BBC bell housing (or bolt up, or have room for an adapter). And the LT1 bell housing won't fit the ls1 flywheel, so you can't use the lt1 clutch.
TECH Regular
Joined: Mar 2015
Posts: 487
Likes: 10
I may have misread but the way I read it was the BBC flywheel sticks out farther than the LS one and the input shaft will just sit rearwards .400" which is not part of the splined portion anyways?
