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6 speed in a 3rd gen?

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Old 03-27-2002, 10:45 AM
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Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
6 speed in a 3rd gen?

Hi everyone,

I am thinking of putting a 6 speed in my z28. It is an automatic right now. Besides getting the clutch pedal, slave cylnder and lines what should be done??

Thank you.

I have a few basic ideas about the conversion but any further insight would be great,

thanks
Old 03-27-2002, 12:50 PM
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Car: grand prix/84 z28
Engine: 4.6 Northstar
Transmission: t-56
and...

IF anyone knows a brand name tranny or where I cold get on costum made tha would be great.

What gears would you reconmend?

Thanks again:hail:
Old 03-27-2002, 01:03 PM
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Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
IF you get a 6 speed from a 93-97 F-Body, you can re use your torque arm and driveshaft, since its the same length as the T5 or 700R4. The aftermarket 6 speeds made by companies like richmond are about 2" longer than the factory ones, so you would have to have the torque arm and driveshaft shortened.

You will however need a new cross member though. If you are good with welding and such, you could make your own, or you could buy the one already made from http://www.skulte.com/
There is also a great tech article on the conversion on that site.

Also, I am not ABSOLUTELY sure, but I think you have to extend the shifter hole a couple inches back.

Oh yea, almost forgot: the 93 6 speed is only rated at 400 ft-lbs and has liek a .67 overdrive, while the 94-97 is rated at 450 ft-lbs and has a .5 overdrive. I would look for a 94-97.
Old 03-27-2002, 02:22 PM
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Car: grand prix/84 z28
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Transmission: t-56
Also

What 6 speed can handle 600+ hp?
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