Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Lq4 + th400 = ?

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Old Jan 19, 2009 | 08:35 PM
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Default Lq4 + th400 = ?

How do I mate my TH400 to my 2002 LQ4? Do I just need spacers/adapters or a full blown custom converter.
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Old Jan 19, 2009 | 08:39 PM
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i bought the GM spacer and the longer flexplates bolts through a search on here for the part numbers. This mated up perfectly to my existing TH400 converter.

http://jeepinpete.com/engine_trans_a...ans_adapt1.htm
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Old Jan 19, 2009 | 08:44 PM
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^^ great pictures of what is going on with the spacer.
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Old Jan 19, 2009 | 08:48 PM
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From: sneaking in your back door as you leave!/cartersville ga
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cheaper alternative

http://store.summitracing.com/partde...5&autoview=sku
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Old Jan 19, 2009 | 08:59 PM
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Cheaper yes, but I feel that the spacer which is bolted into the crankshaft is a stronger design if you're willing to spend $25 more plus you get brand new flexplate bolts in the process.
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Old Jan 19, 2009 | 09:09 PM
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well, i already had arp bolts. so i already had an advantage i guess.

but you can get new grade 10.9 bolts for less than 5.00 at most local hardware stores. i guess its all up to what you want to spend


if you buy a tci flexplate it will come w/ one also (flywheel spacer)


either way will work. its just up to what you want to do
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Old Jan 19, 2009 | 10:22 PM
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Great thanks guys
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Old Jan 19, 2009 | 10:28 PM
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Where can I find part numbers on the spacer and bolts in the jeepinpete article?
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Old Jan 19, 2009 | 10:32 PM
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look at the pictures, they're on the boxes and packaging
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Old Jan 19, 2009 | 11:24 PM
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Thanks
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Old Jan 19, 2009 | 11:26 PM
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So I can order that stuff through GM?
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Old Jan 19, 2009 | 11:32 PM
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I'm sure it will be cheaper through SDparts.
(They are a sponsor)
------------------------------->>>>>>
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Old Jan 20, 2009 | 12:13 AM
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Ok I was just meaning that they are just GM parts numbers
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Old Jan 20, 2009 | 12:18 AM
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My 2005 LQ4 had the flat flexplate with the spacer already installed when I picked it up...
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Old Jan 20, 2009 | 12:21 AM
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I don't see a part number on the spacer box. I tried the main ones and nothing turned up. But I did find the bolts. They want 5 bucks a piece for them? That seems like a lot but maybe I am just not used to buying Gen III stuff.
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Old Jan 20, 2009 | 12:22 AM
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Originally Posted by frojoe
My 2005 LQ4 had the flat flexplate with the spacer already installed when I picked it up...
I have the dished flexplate. Wanna trade?
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Old Jan 20, 2009 | 01:28 AM
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Can I use a flex plate from a Gen I SBC? I have a brand new SFI one in my garage that I would love to use.
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Old Jan 20, 2009 | 05:38 AM
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Originally Posted by luckyhenriksen
Can I use a flex plate from a Gen I SBC? I have a brand new SFI one in my garage that I would love to use.
no, diffrent bolt pattern. And why in those pics does it show the spacer mounted outside the flex plate. what purpose does that serve?
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Old Jan 20, 2009 | 08:41 AM
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Originally Posted by ForcedInduction
no, diffrent bolt pattern. And why in those pics does it show the spacer mounted outside the flex plate. what purpose does that serve?
I was wondering the same thing.
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Old Jan 20, 2009 | 08:58 AM
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the distance is the same on the feet of the converter. it is the pilot hub on the converter that is different.

you can physically bolt it up w/o the spacer or adapter and it will engage the pump and drive fine, but you will have the negative effects of the pilot hub on the converter not being 100% aligned w/ the crank. which in turns will cause really bad vibrations and alot of other really bad things
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