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LS engine with th400 flexplate?

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Old 12-09-2012, 07:38 PM
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Default LS engine with th400 flexplate?

which one to get for my setup?

part numbers would be great and or links!

hub adapter as well?

thanks
Old 12-09-2012, 08:07 PM
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http://www.summitracing.com/parts/hup-hp3795 hope this helps you should be ok with the factory flex plate from what I understand. Some one correct me if I'm wrong.
Old 12-09-2012, 08:50 PM
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Look up the parts for this offered by Hughes Transmissions.
Old 12-09-2012, 10:29 PM
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LS flexplate but you need to use a spacer like shown above....if you have a flat LS flexplate you need a different spacer that bolts to the crank then you bolt the fp to it but if you have the dished LS fp you can use the one above from hughes, it goes between the the fp and the tc
Old 12-09-2012, 10:33 PM
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Here's a thread about it....

https://ls1tech.com/forums/conversio...uto-trans.html
Old 12-09-2012, 10:55 PM
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I used a hughes performance HP4004X dished flexplate with the GM spacer. Worked great. Hope this helps. Eric L
Old 12-10-2012, 09:06 AM
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Prorac1-= you have part numbers?

I dont have a flexplate right now so any will do. I will need to find a stocker if it works and the whatever adapter for that FP...
Old 12-10-2012, 04:31 PM
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Yeah, HP4004X. Eric L
Old 12-10-2012, 04:41 PM
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so that will work with all ls1 and 5.3L engines to adapt a th400 with out the use of a extra spacer correct?
Old 12-10-2012, 05:10 PM
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Their are a few different options. Give us a call or PM and we will get you fixed up!
Old 12-10-2012, 07:49 PM
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I did the TCI plate on my LS/TH350 combo....

P/N 399753

SFI rated.
Old 12-11-2012, 12:51 PM
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Originally Posted by Doug G
I did the TCI plate on my LS/TH350 combo....

P/N 399753

SFI rated.
Same one I went with. And I had a converter from Lenny at Ultimate Converter Concepts which was built for a LS1 engine and th400 trans so I didn't need any spacer or anything.
Old 12-11-2012, 07:20 PM
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You will have to use the GM spacer with the flexplate. And yes it should work with any LS bolting to a TH trans. Watch out for the early motors with the extended crank. And its SFI approved. IIRC it cost me around $140. Eric L



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