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Ly6 flex plate for 4L80e

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Old Nov 12, 2016 | 01:21 PM
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Default Ly6 flex plate for 4L80e

My Ly6 currently doesn't have a flex plate and I m looking to mate a 4L80e to it but I'm unsure of the flex plate and spacer needed. Can anyone give me a part number or direct me to where I can find what I'm looking for please? Thanks.
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Old Apr 12, 2020 | 09:51 PM
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I’m currently running into the same situation.. I have an ly6 with no flex plate and plan to run a 4l80..can you tell me what u ended up doing
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Old Apr 13, 2020 | 07:33 AM
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crank spacer and flat flexplate
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Old Apr 13, 2020 | 02:38 PM
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Thanks for the reply.. would you recommend upgrading the flexplate or would a stock gm work .. I am going to be around 500 hp but mostly street driven
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Old Apr 15, 2020 | 09:56 AM
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I'll never NOT recommend an SFI flexplate.
It's just the smart way to go

Now...I've had customers put WAY more power through a stock flexplate than you have...so spend money where you see fit
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Old Jun 3, 2020 | 05:55 PM
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What type of starter would I need to use for this set up
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Old Jun 4, 2020 | 07:03 AM
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Stock LS
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Old Jun 4, 2020 | 09:38 AM
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Originally Posted by MaroonMonsterLS1
crank spacer and flat flexplate
Is there a reason not to use curved flexplate??

That's what I will be using with my 6.0 and 4l80E. I was told by a converter company that it's fine.
I bought a PQX-1834610 made by PRW. Same as Hughes and many others.
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Old Jun 4, 2020 | 01:25 PM
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If you're ordering the converter with those specs. Then it is fine.
If you custom order a converter, they can make the bolt pattern match the dished flexplate and they can make the pilot longer so you don't need an adapter.
But, if you're just ordering a "normal" 4l80e converter with nothing custom, the pilot won't engage without the spacer. And the bolt pattern won't be right without using the flat flexplate.
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Old Jun 4, 2020 | 01:27 PM
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Originally Posted by MaroonMonsterLS1
If you're ordering the converter with those specs. Then it is fine.
If you custom order a converter, they can make the bolt pattern match the dished flexplate and they can make the pilot longer so you don't need an adapter.
But, if you're just ordering a "normal" 4l80e converter with nothing custom, the pilot won't engage without the spacer. And the bolt pattern won't be right without using the flat flexplate.
Thank you for explaining.
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Old Jun 4, 2020 | 01:46 PM
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Originally Posted by MaroonMonsterLS1
Stock LS
when you say stock LS ..does that mean any type of Ls starter .. so would a 5gen camaro starter work ? Cause in my case I’m using the gm spacer to push back the Flat flexplate .. would I need a truck starter?
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Old Jun 5, 2020 | 07:09 AM
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For starter ring gear placement

Flat flexplate with spacer between crank and flexplate

==

dish flexplate with no spacer

==

dish flexplate with spacer after the flexplate



so yea, your gen5 camaro starter should be perfectly fine.
The differences in starters are the size of the body and clocking of the solenoid. and some models have 2 long bolts and some have a long and a short. So, just pick whichever fits the chassis/trans bellhousing you have and it should be fine. Ring gear placement is the same as far as I know
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