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GMC V6 and V12 Engines Engine repair and rebuilding

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  #11  
Old March 5th, 2014, 03:00 AM
tommr tommr is offline
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Default Re: GMC Medium Duty Flywheel Size SAE 2

Yes I want to lose this flywheel.. I don't need the extra rotating mass. got prices under $1000 18 months ago for a copy of this pot style flywheel. swapping out the non synchro Spicer 4 spd for a 5 speed OD Spicer. wasn't thinking heavy duty applications. thanks.
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  #12  
Old March 5th, 2014, 10:50 PM
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Default Re: GMC Medium Duty Flywheel Size SAE 2

Here is the flywheel that came on the 401M;
16" across tooth to tooth diameter.
Not as concave as your tommr and used a 13" clutch.
Unsure of what size truck it was off of; Older Gent said a tractor trailer
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  #13  
Old March 6th, 2014, 01:18 PM
tommr tommr is offline
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Default Re: GMC Medium Duty Flywheel Size SAE 2

thanks for taking the time to post those flywheel pics. I think V6 has it right that I need a GMC 7500/8500 flywheel. thanks much.
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