Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Flywheel Issues?

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Old Dec 28, 2011 | 06:44 AM
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99VetteFRC's Avatar
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From: Felton Pa
Default Flywheel Issues?

I have an '03 4.8L engine to put in my Chevelle with a 700r4. I found on this web site somewhere that the flexplate to use is GM part# 12551367. The truck flexplate that is currently on the engine has an offset that will be closer to the converter than the conversion flexplate is FLAT. Any thoughts or insight on this issue would be helpful.
Attached Thumbnails Flywheel Issues?-dscn1056-copy.jpg   Flywheel Issues?-dscn1057-copy.jpg  

Last edited by 99VetteFRC; Dec 28, 2011 at 12:29 PM.
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Old Dec 28, 2011 | 08:15 PM
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i think that flat plate is meant to be used with a crankshaft spacer and a 4L80E trans.
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Old Dec 28, 2011 | 08:37 PM
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Well the truck flexplate that is on the engine is about 3/8 inch further from the block than the one I got for Chrismas. I am putting my 700r4 behind the 4.8 so I hope it all fits ok.
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