Auto to 4 speed swap - Chevy Nova Forum
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Old 27th-April-2011, 11:54 AM   #1
Capt. Nova72
 
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Auto to 4 speed swap

Hey guys, its been a while since i have posted and i have made great progress...Chopping it to bits further and further is progress right??

Anyway i just had a question about how much of an undertaking it would be to convert the 3-speed automatic to a 4 speed manual.
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Old 27th-April-2011, 12:06 PM   #2
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Just need a clutch pedal, z bar, bellhousing, flywheel, trans., shifter, clutch, pressure plate, pilot and throw out bearing. The driveshaft, croossmember, and mount will all interchange between the 4 speed and a turbo 350 automatic.

Last edited by sbc1320; 27th-April-2011 at 12:20 PM.
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Old 27th-April-2011, 12:58 PM   #3
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Might need the bracket that attaches to the subframe and holds the end of the Z-Bar and speed-o cable if location where cable connects to 4-speed is different than th350. Have to plug Radiator a/t outlets. Does your car have a center console, if so you will need a few pieces there also to switch from a/t shifter to 4 spped shifter. I'm sure I'm missing something else. It would be nice to fine someone who has a factory set-up that is switching the other way. If I could find someone like that, I would purchase their set-up and make the change also. Good Luck
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Old 28th-April-2011, 12:29 PM   #4
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it doesn't have a center console, I guess that's because its a bench seat set up. I also was wondering if you had any idea of what kind of time and money i would be putting into it as well.
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Old 28th-April-2011, 01:36 PM   #5
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Quote:
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it doesn't have a center console, I guess that's because its a bench seat set up. I also was wondering if you had any idea of what kind of time and money i would be putting into it as well.
doing it yourself is time consuming, don't be in a rush unless you have done one before. Money.. over a grand easy.
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Old 28th-April-2011, 02:46 PM   #6
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After researching this myself and speaking with a few members, $2000.00 is a good price to figure on(includes used Muncie). Thats doing the work yourself and finding a few parts used. A rebuilt Muncie can go for as much as $1500.00 itself.
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Old 29th-April-2011, 08:27 AM   #7
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I got around 1500.00 in my conversion. That includes rebuild kit for muncie, if you can find a muncie that needs rebuilt for cheap get it. They are very easy to rebuild, I bought a book on how to do it with pictures, very easy.
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Old 29th-April-2011, 09:54 AM   #8
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if you use a muncie, you will need a whole in the firewall to accommendate the speedometer cable to the passenger side.
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Old 29th-April-2011, 10:52 AM   #9
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I'm considering swapping to a manual in my 71.

I know everyone goes for a Muncie transmission, but what are the other options? Would a manual from a later model car be able to be used? Like a transmission from a mid-90s Camaro?

What about a Saginaw 4 speed?
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Old 29th-April-2011, 12:54 PM   #10
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I'm considering swapping to a manual in my 71.

I know everyone goes for a Muncie transmission, but what are the other options? Would a manual from a later model car be able to be used? Like a transmission from a mid-90s Camaro?

What about a Saginaw 4 speed?
I was wondering the same thing. Is Muncie just "the way to go" for classic cars.
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Old 29th-April-2011, 09:48 PM   #11
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Dollar for dollar, the Muncie is the best tranny for a swap, most newer trannies aren't strong enough or are very pricey. TKO, Richmond, and Keasler(sp?) are over $2000, and as high as $3000 plus the floor needs to be modified, plus any other non stock items that are needed. A good muncie M21 or 20 can be had under $800 and all the accessories with clutch should be about $1000, but the information on how to, is everywhere, as are the parts and pieces with no fabbing or trick parts needed!

I've been debating a 5 spd swap, but don't want to modify my floor or hand out $3500.
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Old 1st-May-2011, 12:28 PM   #12
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Ive been thinking of doing a muncie swap on my 70. Are all tailhousing the same? I have a chance to get a 64 nova muncie. So a 70 nova mounting plate and shifter will bilt up the the tailhousing right?
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Old 1st-May-2011, 10:26 PM   #13
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They're the same length, but there are some that use a 400 yoke I believe (later Muncies, 70 up), and the other difference, is the speedo cable outlet maybe on the driver or passenger side.
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Old 2nd-May-2011, 08:31 AM   #14
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If the input shaft is fine spline than the output is 32(same as a turbo 400), and vice versa on a 10 spline input shaft it is a 27 output(same as a turbo 350). You will need the tail shaft #3857584 or #3978764 for the passenger exit speedo. This will allow the correct shifter to bolt on it for your car.
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