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Old 06-23-2007, 12:31 PM
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Manual swap in my G-body? Lots of questions/Long!

Hello all. The information I gather here could be the start of something big or the end of something very short lived.

1988 Cutlass Supreme Classic, 350 Chevrolet, 2.84:1 ( I think) rear end. The transmission is going, which is a 200-r4. For what it will cost to get that rebuilt to handle power, or to swap in a t-400 or likewise, Id rather do what I want.

I would like to put a manual transmission in. I was thinking either a t-10 or a 5 speed from a 3rd gen F-body.

I am not opposed to doing work myself, but I dont have alot of skill and tools. This is my only vehicle, so I think Id need alot of time to gather everytihng and spend a weekend installing it.

Now for the questions...

If the transmission hooks up to the engine, what would I have to get custom made? I know a transmission mount and a driveshaft at least. How thick does the Xmember need to be?

Hydraulic Clutch? My understanding is a 'hydraulic clutch' is standard now-adays, and makes live much more enjoyable. Is this a 'unti' I could take off a donor vehicle, or something far more complex. I am not opposed to a manual style clutch, as long as it wont cramp my leg in town

Shifter location. I have a bench seat, and actually am looking forward to the old-school look with the shifter coming straight up through the floor. Im sure I could manage to find a shift lever that would suit my needs.

What will fit best. I dont know very much, let alone what is tolerable for gaps between floorpans/transmissions etc. best fit?

I dont have a shop, but I do know some people who do. My main concern is if this is doable, and for less than the cost of a performance rebuild of my 200-r4.

Help and advice is grealty appreciated. Thanks alot

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Old 06-23-2007, 01:01 PM
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manual shift trans

Hi, i think most all the parts you will need,can be found on a 1988 camaro or firebird. (there may be some specific parts for those cars,that you may have to buy. go to a junk yard and ask them.they have a book, that shows all the interchangeable parts between gm vehicles. ,ask if they can get you all of the parts,and HOW is not hard to change over,but you will need,Flywheel,clutch,pressure plate and throw out bearing. plus the foot lever for the clutch,and of course a way to activate the clutch,either hydraulic,or manual,plus the transmission,and the crossmember,and probably have to either shorten or lengthen the drive shaft,depends on length of transmission. if you can find a complete car (junker or wreck)for parts that will be the way to go. ,then sell whats left of the car to recoup some of your money.Buy a chiltons repair manual for the car,it will give you a lot of how to info.(about $20.00) worth its weight in gold.

Last edited by boatbob2; 06-23-2007 at 01:10 PM. Reason: more info
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Old 06-23-2007, 01:05 PM
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It is doable but see if you can find the pedals and linkage from a G-body that came with a manual..that is first..Once that is in hand then the install of a manual is a straight forward will need a manual flywheel, clutch and pressure plate. Bellhousing will be needed as well as the tranny.

Tranny will be an issue as the cost of a trans to handle power will be as much or more than getting the 200 r-4 built..Not to mention the work of making the swap..Since it is your only car and you need it I think it may be a good idea to stick with what you have..Been there done that..

I have tried most all of it and now do what is known to work..
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Old 06-25-2007, 10:27 PM
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If you can find a junker G-body with a stick, get the whole car. It will have virtually everything you need as far as conversion parts. Rare as hen's teeth, I imagine.
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Old 06-29-2007, 03:41 AM
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Manual swap in my G-body? Lots of questions/Long!

Not too many G bodies came with standard tranny's,the only ones that I am sure about are early-mid 80's Malibu's with a six cylinder and a stick shift.I'm pretty sure mine has a stock crossmember,the tranny was in it when I bought the car.
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