Question about the 3400 swap
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Junior Member
Joined: Sep 2008
Posts: 14
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From: Indianapolis
Car: 1988 Camaro
Engine: 2.8
Transmission: Auto
Question about the 3400 swap
Im about to do the 3400 swap here in about a month or so and ive noticed everyone who did the swap i think used an older 3400 pre OBD2. My question is, is there a problem with using a newer OBD2 3400?
Senior Member

Joined: Mar 2009
Posts: 790
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From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Question about the 3400 swap
Are you talking about using the front wheel drive 3400 or a hybrid or a rear wheel drive 3.4 ?
Senior Member

Joined: Mar 2009
Posts: 790
Likes: 0
From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Question about the 3400 swap
I can't remember who but several members have done this and could help . did you do a search on the topic or look in the v6 threads for the topic ? Maybe one of them will get in here and help you out as there is some fab work to do to get the front wheel drive engine mounted right . If you wanted to get a 3.4 and put it in all you need to do is pull the 2.8 , put your intake setup on the 3.4 w/injectors for the 3.4 , add your sensors and all that . Then you could do a hybrid on the 3.4 with the 3400 topend .
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From: right behind you
Car: '85 maro
Engine: In the works...
Transmission: TH700 R4
Axle/Gears: 3.73 posi
Re: Question about the 3400 swap
Look at what mars did with his. If you want to drop in a 3x00 motor you need to notch the k member or get a tubular k and make motor mounts. A hybrid takes some trickery as well. Don't waste your time with the older stuff if you're going to do this, get a newer 3400 or a 3500.
Last edited by bl85c; Mar 4, 2011 at 09:32 PM.
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From: Davenport, Iowa
Car: Still a 3rd Gen
Engine: 450HP 355
Transmission: TH350
Axle/Gears: 9" with 4.11's
Re: Question about the 3400 swap
all 3400's were run on OBD2 from the factory but that doesn't matter for this swap, there are hundreds swapped into older OBD1 cars. With a good tune they run just fine and in some cases better than they did from GM.
as mentioned you'll need to notch the K member and make some motor mounts, you'll also need to flip the LIM and UIM around, swap to a RWD timing cover and accessories, play around with the wiring and a few other small things like fuel lines and exhaust setup.
as mentioned you'll need to notch the K member and make some motor mounts, you'll also need to flip the LIM and UIM around, swap to a RWD timing cover and accessories, play around with the wiring and a few other small things like fuel lines and exhaust setup.
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