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04-06 GTO MN12 Transmission questions

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Old 07-11-2011, 07:24 AM
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Default 04-06 GTO MN12 Transmission questions

I did search and know the differences between an F-body T56 and MN12 but heres what i dont know:

-Is it possible to bolt up a stock/or aftermarket trans mounted TQ arm to an MN12?

-Can i swap an F-body bell onto it to rid myself of only using the GTO starter?

-Is the stock GTO clutch/flywheel set-up compatible with the F-body bell?

I can buy a MN12 from my work with everything included but i guess its the whole TQ arm thing thats really getting me, i really need to use a stock TQ arm for now since my budget is getting slim. Thank You in advance for any help.

FYI- this trans would be going into a 91 Trans Am as im swapping a 5.3/T56 or in this case, maybe a 5.3/MN12 into it.
Old 07-11-2011, 08:58 AM
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Originally Posted by 91FormulaKiller
I did search and know the differences between an F-body T56 and MN12 but heres what i dont know:

-Is it possible to bolt up a stock/or aftermarket trans mounted TQ arm to an MN12?

-Can i swap an F-body bell onto it to rid myself of only using the GTO starter?

-Is the stock GTO clutch/flywheel set-up compatible with the F-body bell?

I can buy a MN12 from my work with everything included but i guess its the whole TQ arm thing thats really getting me, i really need to use a stock TQ arm for now since my budget is getting slim. Thank You in advance for any help.

FYI- this trans would be going into a 91 Trans Am as im swapping a 5.3/T56 or in this case, maybe a 5.3/MN12 into it.
-Yes. The GTO MN12 uses the same tail housing as the f-body M6 trans
-Yes. The GTO and f-body share the same bellhousing bolt pattern.
-Yes. The flywheel uses the same tooth count and the stack height of the clutch is the same.

As long as it is out of a GTO and not a Corvette or CTS-V the MN12 will bolt directly into an f-body with only changing the offset lever for the shifter.
Old 07-11-2011, 09:28 AM
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Thanks Jeremy, appreciate it!



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