Is there a 5 speed that will bolt up to the 3800? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-26-2006, 11:26 PM   #1
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Default Is there a 5 speed that will bolt up to the 3800?

A 5 speed FWD standard transaxle?

I'd probably stick a series one 3800 (maybe modded) to a 5 speed, if one were avalible from a yard? Is it possible, or will GM'* 5 speeds bolt only to the 60 degree V6'* like the 2.8-2400?

This isn't for my lesabre, but for another project, and I wondered if it was possible? I have such high regard for the 3800 over gm'* other 60 degree v6'*.

If this isn't the right place to post it, kindly point me in the right direction.
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Old 02-26-2006, 11:46 PM   #2
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Idk maybe the Getrag 5-speed from back in the day, that might work. I know it bolts up to the 2.8'*, which have the same bellhousing as the 3.1, which came with both the THM125 and THM440, <---- which the 3800 came with, which would theoretically mean that the getrag 5-speed SHOULD hook up to the 3800, provided you have the flywheel custom made.
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Old 02-26-2006, 11:50 PM   #3
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What do Fiero modders use?
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Old 02-27-2006, 12:00 AM   #4
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They use an adapter plate with the Getrag-282 or 284, but the issue is that they don't handle higher HP too well in stock form. Some do, most don't. A 284, which is the stronger one and came with the 3.4L from 91-93 are also very hard to find.

Fiero guys have made them work.
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Old 02-27-2006, 01:44 AM   #5
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Either the 282 or 284 will bolt up but making it work properly is a chore. There is a guy on ClubGP that did an L67/282 in a earlier GP (like 96 IIRC). Then he ended up taking out the L67 and swapping in an L36 when he decided to sell the car to try to cut his losses. The transmission held up so far but he said that he'* not sure how much longer it would hold up.

So basically, Its possible but not practical.

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Old 02-27-2006, 01:27 PM   #6
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Hrmm, well, i figured i might have durability issues that could be resolved with a little work of the gearing and ratios, and installing durable gears.
Essentially, i'm looking for a torquey speedy machine capable of 0-100 (0-60 MPH) times like 6-7 seconds if possible.

Perhaps a 3400? Not as torquey?


I'm checking all of my options, and figured you guys might know a bit about something like this. I just gotta have a V6 and a standard, no 4 bangers, and no automatics.

A 4 speed will work fine, just as long as i can use a stick!
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Old 02-27-2006, 05:24 PM   #7
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What kind of car are we talking about putting this in. Weight will make a huge difference on what the trans can handle and how fast the car will go and whatnot.

But, just for the record, my 1990 Cutlass Calais with a 2.3L 5 speed did 0-60 in the range you are talking about. It doesn't take a 90* V6 like you are talking about if you have the setup in the right car.

Also, good luck beefing up a 282. 284'* can't be rebuilt, so that takes that option out, not to mention they are $$$.

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Old 02-28-2006, 12:14 AM   #8
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I really hate to say what I'm putting it in, and am still exploring all options.
Its an 84 Citation. Body is in excellent shape, wasn't driven since 94, and has only 80,000 clicks on it. Originally a parts car, the stock 2.5 was ruined, because the engine and transaxle was pulled for parts, and STUPID me left spark plugs out of the holes for water to fill. Ruined it quickly.

I'd paint it red, redo the interior, new seats, modify it to fit the engine and transaxle, and add the floor shift. Stupid idea for a Citation, but its light, and the body looks unique and mint!

The reason I'd take a 3800, is becuase it produces alot of HP, is durable, its a V6, and a proven motor. A 2.8 isn't something to squeal about, neither is a 3.1 or 3100. I could go with a 3400, but i'm not crazy about intake gaskets, yikes. I wouldn't take a series 2 3800 either, just something OBD 1, and powerfull.

Well, fellas, thanks for the help, and I know its a stupid thing to do, sheesh, I don't even own a bonnie, lol, again, thanks.
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Old 02-28-2006, 05:34 PM   #9
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The 3100 and 3400 are basically exactly the same except one has a larger bore than the other. That sounds like a fun project, and it would be very simple to make it as quick as you are looking for because that is a very light car. The thing about using a 60* is that those cars were available with a 2.8. Therefore it should be pretty easy to swap in any 60*, and 60*'* are a lot more reliable than you are making them sound. If you dropped in a 3400 with a 5 speed and did a little exhaust work, opened up the intake a little, put a cam in it, and an UD pulley, and you would probably be going AT LEAST as fast as you want, if not a LOT faster. Or you could swap in a Turbo 3.1 and go that fast without doing anything, and then you can do a chip and UD pulley and be going a lot faster than you want.

A 3800 would be more work then I think you are looking to do, plus since you are talking about doing a Series I, it wouldn't be making any more power than a 3100/3400. If you do some research on the 60** you will find that they can make power easier than you apparantly think they can, and they are pretty damn reliable as well. Not to mention they are lighter than the all iron 3800, so if it makes the same power obviously you'll be going faster. Maybe you should take a look over on www.60degreev6.com.

Shawn
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Old 03-01-2006, 12:38 AM   #10
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You know what, you're absolutly right. It'll be more practical, and probably cheaper, not to mention the transaxle will be able to fit on it better. I'll just find a 5 speed, modify the gear ratios if I can, and drop her in. I'll have a car very capable.
This car is absolutly not gonna be intended for a daily driver, Its gonna get full working, everything taken apart, rust-proofed, etc. I am thinking of a nice red color. Interior will be custom made, seats buckets, new carpet, gear shift console, etc. This is a project car, and its in excellent shape, virtually no rust at all.

I'll probably check in with the 60 degree V6 forum to find out what I need to do this. I know for sure, it'll need quite a bit of re-working to make it fit. I'm good with a torch, and have a MIG welder, do modding the frame isn't a problem.

Originally, I had wanted to rework it for a RWD, with a positrac rear axle, 4 speed muncie, or equivalent, with perhaps a re-worked 305 or 350. However, this would have involved extensive modifications to the frame, floor, etc. Everything would have to be reworked. I was talked out of it, since some people thought it was a silly waste of money. Still though, 0-100 times be close to race car specs, and man, it'd probably would rip itself apart with those times, besides, its just too small..
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