Engine Swap Question
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 95
Likes: 0
From: Indiana
Car: 1990 Pontiac Firebird
Engine: V8,350,5.7 L.
Transmission: Automatic - 700r4
Engine Swap Question
Hey everyone. I just bought a 350 Chevy Small Block 5.7 Liter engine to swap into my 1990 Pontiac Firebird. The question I have is, Will this engine bolt up to my stock transmission or do I need to get a different one?? Just get back to me as soon as possible. Thank You.
Any an all feedback will be appreciated.
Any an all feedback will be appreciated.
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Joined: Mar 2007
Posts: 3,525
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Engine Swap Question
v8 and v6 trans have different bolt patterns on the bell. youll need a v-8 700r4.
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 95
Likes: 0
From: Indiana
Car: 1990 Pontiac Firebird
Engine: V8,350,5.7 L.
Transmission: Automatic - 700r4
Re: Engine Swap Question
Are you sure. Cause all the research I've done says other wise. I just found this website like 5 minutes ago (http://www.nastyz28.com/chevy-transm...tification.php). And this is what I found - THM700-R4 - 4 Speed transmission used in GM cars and light trucks with the 2.8, 3.1, 4.3, V6, Chevrolet built 305, 350 and 454 engines from 1982 to 1992. I'm thinking it will work no problem. i could be wrong but that's what I'm beginning to believe.
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iTrader: (1)
Joined: May 2007
Posts: 255
Likes: 1
From: Binghamton ny
Car: 87 Iroc
Engine: 350tpi
Transmission: 700r4
Axle/Gears: 10 bolt, unsure of gears yet
Re: Engine Swap Question
Its the same very general tranny. Diff bell housings with diff bolt patterns.
Joined: Oct 2007
Posts: 1,375
Likes: 6
From: Wyoming
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: Engine Swap Question
You may just need a different bellhousing. Someone ought to know this on here for sure.
Supreme Member
iTrader: (1)
Joined: Mar 2007
Posts: 3,525
Likes: 7
From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Engine Swap Question
the bell housing is part of the trans, not separable. 100% sure you need a 700r4 from a v8.
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 95
Likes: 0
From: Indiana
Car: 1990 Pontiac Firebird
Engine: V8,350,5.7 L.
Transmission: Automatic - 700r4
Re: Engine Swap Question
Yes okay I see now. I hope you didn't think I was trying to offend you lol. Thanks for your help though. but like "New2Chevy" said, can I just get a different bell housing??
Supreme Member
iTrader: (1)
Joined: Mar 2007
Posts: 3,525
Likes: 7
From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Engine Swap Question
no, the bellhousing is cast into the case, its all 1 peice.
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