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Who make the adapters for LS to TH400?

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Old Nov 3, 2011 | 07:59 PM
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Default Who make the adapters for LS to TH400?

Are there options for the adapters to bolt up my 400 to my lq9? Brands, quality and pricing aprcd. Thanks.
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Old Nov 3, 2011 | 08:04 PM
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pretty sure it bolts right up...do you mean for the flywheel to converter?
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Old Nov 3, 2011 | 08:09 PM
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Bellhousing bolts up. You need a spacer for the flywheel, I know the 6.0s with 4L80Es have them. You can probably find a used one on ebay cheap enough. Not sure who sells them new. You need the longer bolts as well.
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Old Nov 3, 2011 | 08:35 PM
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mine bolted up straight away...
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Old Nov 3, 2011 | 09:15 PM
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The spacer is what i am after. I know the bellhousing lines up. I actually had to tap a blank on the trans that wasent used on whatever application it was in back in the day. I would like to get this adapter new as this is a very through and expenisve build...
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Old Nov 3, 2011 | 09:33 PM
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Images Google - ls1 crankshaft adaptor
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Old Nov 4, 2011 | 07:51 AM
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I would actually suggest an SFI flexplate over the stock plate with adapter. Does the converter have a dual bolt pattern?

Chris
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Old Nov 4, 2011 | 09:24 AM
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I have not selected a converter yet. I will fill out your form thing maybe you can help...
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Old Nov 7, 2011 | 09:40 AM
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Chris @ Circle D is the best, he built me a T400 converter 4600-4800 with a LS front. The converter hooks unreal, just like a daily driver.
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Old Nov 7, 2011 | 02:33 PM
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If you're looking for a bellhousing/scattershield I would suggest Quicktime Performance. The quality is the best I've seen so far. McLeod would be second to them but Quicktime makes a number of conversion bellhousings for cross platform/cross engine setups.
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Old Nov 7, 2011 | 02:39 PM
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If this is just a street car, all you need is a replacement flywheel kit for a truck equipped with the 4l80E. I paid $50 for the flyweel & spacer assembly brand new from GM.

GM #12621399 Flywheel & spacer assy (used to adapt LSX motors to old school automatic transmission)

I run mid 11s with this set up. If you plan to go real fast, hughs has a nice SFI flex plate and spacer set up.

X2 on Chris at Circle D. I am very please with my Circle D converter.
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Old Nov 7, 2011 | 04:07 PM
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Im going to have to go with the SFI flex plate. Making the car 100% nhra legal...eh. Im figuring on running mid-high nines. But prob not going to beat it to death on the strip (50 passes a year ish)

-LQ9 build here also!
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Old Nov 7, 2011 | 10:03 PM
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I bought a JW performance bellhousing for my th350 when I forgot to take a bellhousing bolt out and broke mine. (yea i know im an idiot) but it had the LS bolt pattern. Summit sells them.
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