BUICK 3.8L 231ci Manual Transmission Flywheel

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Living in the Past
Jul 19, 2009
Permanent Temporary
Did the Buick V6 ever get mated to a manual transmission? I have a kooky idea of putting a T5 behind a 231. I have a BOP Gbody bellhousing, ironically. RockAuto lists LFW131. Looks remarkably like a standard SBC neutral-balance 153-tooth flywheel. I have read about odd-fire and even-fire 231s. Also, would it bolt to a 400 or 455? No idea about Buick engine balance, tooth count, starter gear counts.

Any hints from the Buick community?
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Nov 15, 2014
Des Moines, Iowa
very few. there was a 78 3/4 speed (cant remember) stick regal for sale near me for way too much. completely rotted out.

TA makes odd and evenfire flywheels. $315, but no searching till one pops up.


Sep 14, 2014
Elderton, Pa
There was the 49 state base model A's for '78-'81 that did come standard with the 231 & the 3 speed. Believe there were Cutlass 231's that might of had the 5 speed (Cutlass guys will correct that thought). Then the BOP H-bodies had 3, 4, & 5 speeds behind the 231 & the 196. Even Firebirds with the 231 had the 3 speed. Don't forget the Jeep's with a Buick V6. One thing I'm not sure about is if there will be a balance difference between the even & odd fire 231's or even one from a V8.
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pontiac guy

G-Body Guru
Oct 28, 2016
Royse City, TX
Be very careful with rockauto's catalog. Over the years there have been a lot of consolidation by people who don't know what they're consolidating. I will bet that flywheel is the same one for the series 2 3800. as far as RockAuto is concerned the displacement is the same so it must be the same part.


Royal Smart Person
Feb 7, 2019
Yes they did! Here is my 1978 Buick Century Sport Coupe 3.8 V6 4 speed with a FACTORY installed Hurst shifter R.A.R.E.
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G-Body Guru
Sep 1, 2018
Southern New Jersey near Philly
I went through this years ago on a manual transmission project using an intercooled GN engine. Even if you get a factory flywheel from a 78-79 you will still need to rebalance the rotating assembly unless you are putting the flywheel on a factory 78-79 engine. Those engines are externally balanced and piston weights really vary a lot.
On my project I used a steel Centerforce flywheel. That was back in 2000. I am not sure if it's still available.
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