LS1TECH - Camaro and Firebird Forum Discussion

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

a4 and m6 crank diffrence

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Old Mar 13, 2008 | 06:46 PM
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Default a4 and m6 crank diffrence
Is there any diffrence in the crankshafts exclunding the balancing?I´ve heard something about it but never seen it
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Old Mar 13, 2008 | 06:57 PM
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The M6 crank should be the same BUT has a pilot bushing installed for the input shaft to slide into. Not really a crank difference but something you need to address if swapping auto to manual.
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Old Mar 13, 2008 | 06:59 PM
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ah ****, can this been done with the engine assembled? Upon reflection this sounds like a retarded question considering all the A4 to M6 swaps out there.
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Old Mar 13, 2008 | 07:22 PM
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sure it can be done engine assembled just have to have the tranny disconnected from it.

There are bearings available too but I believe most guys opt for bushings.
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Old Mar 13, 2008 | 08:11 PM
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Ok,thought so

I removed my m6 crank and replaced it wit an a4 but there wasent a bushin in the m6,i´ve driven it and seems fine,what could i damage other then the trans?
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Old Mar 13, 2008 | 08:24 PM
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I have auto b-body short block (auto) in my car and a 6 speed and everything related to that seems fine.
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Old Mar 13, 2008 | 08:41 PM
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I never ran a manual without a pilot bushing, I would guess though that it is hell on the input shaft bearings.

One of those I would never try it to find out sort of things.

http://www.autozone.com/R,APP265083/...ductDetail.htm
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