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5.3 with a t56?

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Old Jun 4, 2008 | 08:34 PM
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Default 5.3 with a t56?

Ok guys help me out! I just bought a 2004 5.3L LM7 Engine! I am swapin it into a Chevy S10! I want to use a t56 tranny! is the bolt pattern the same? or is this just a direct bolt in with like FBODY ls1 clutch and flywheel? What is the whole scoop on doin this?
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Old Jun 4, 2008 | 09:21 PM
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Yeah , it should work exactly the same as in a F body with a 5.7
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Old Jun 5, 2008 | 02:51 PM
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I thought there was a thing about the crankshft or something being longer back there by the flywheel?Seems I heard that somewhere...
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Old Jun 7, 2008 | 12:36 PM
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Nope, just slap it in.
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Old Jun 7, 2008 | 02:04 PM
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Originally Posted by s10-den
I thought there was a thing about the crankshft or something being longer back there by the flywheel?Seems I heard that somewhere...
That was if you were looking to put an ls1 t56 with an lt1 or an lt1 t56 into an ls1
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Old Jun 7, 2008 | 07:17 PM
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Default Thanks Guys!

Thanks Guys! I thought that was the case! I just bought a T56 this morning!
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Old Jun 10, 2008 | 06:08 AM
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One thing, a friend told me is (he has a lq4 6.0 not sure if its same or not but something to check) there is a spacer back there that changes where the flywheel is. He had to remove that to work with his starter correctly. Had to completely remove the trans again
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Old Jun 11, 2008 | 08:55 PM
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I am still waiting on mine to ship so i havent tried it yet! i will look into this though! Anyone else heard of this! I keep hearing direct bolt in! But i wanna hear about problems before the final install!!
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Old Nov 18, 2008 | 03:21 PM
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Originally Posted by Slow5.0.
One thing, a friend told me is (he has a lq4 6.0 not sure if its same or not but something to check) there is a spacer back there that changes where the flywheel is. He had to remove that to work with his starter correctly. Had to completely remove the trans again
the 99-00 6.0L motors had a 1/2" to 3/4" of extra material on the back of the crank only allowing it to work with the 4l80e, 01 and after it was the normal crank and could utilize the 4l60 or t56. I am currently trying to find out if this is the same story with the 5.3 or not as I am looking at the lm7's... I would think not since these motors came in the 1/2 ton trucks with a 4l60 or 4l65, but if anyone knows for sure whether there is a certain year or years where the t56 would not just bolt to the 5.3 please let me know.
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Old Nov 18, 2008 | 05:15 PM
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5.3 and 5.7 (ls1) use same crank
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Old Nov 19, 2008 | 01:52 PM
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I just finished putting a 1999 T56 behind my 2003 5.3l and ran into one snag. You need a Pilot BUSHING, not a pilot bearing, there is a big difference. The bushing can be had at Napa, carquest wherever for about $4. Other than that one hang up, the swap is super easy and it should go together easy for you.
Good luck.
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Old Aug 30, 2019 | 10:22 PM
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Originally Posted by MunsonAuto
I just finished putting a 1999 T56 behind my 2003 5.3l and ran into one snag. You need a Pilot BUSHING, not a pilot bearing, there is a big difference. The bushing can be had at Napa, carquest wherever for about $4. Other than that one hang up, the swap is super easy and it should go together easy for you.
Good luck.
Do you remember the part number?
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