Does the 3.8 90*V6 have the same bellhousing pattern as a 3.4, 3.1, 2.8 60*V6? Or is it the SBC Bellhousing pattern?

they gonna have the B-O-P bolt pattern.

so in other words a 5 speed that is on a 3.4 will not bolt up to a 3.8?

if you switch bellhousings it should, but I'll let those who've worked on 3rd gen sticks answer that one.

the 3.8 is a 90 degree engine, the 3.4 is a 60 degree, so the bellhousings are definitely different, probably the same as the 4.3 or the v8s. it is likely that the 3.8 has the same input shaft as the other 90 deg engines, you would probably have to get an adapter clutch and a diff flywheel as well.

speculation however. all i can guarantee is that the bellhousings are different.

If you use a 3.8 from a front wheel drive, It uses the metric bolt pattern of the 2.8 and 3.1. If you use a rear wheel drive 3.8 block from the 80's, It will use the b-o-p pattern. McLeod sells a bellhousing that bolts to both che*y and B-O-P engines and has the tilted bolt pattern for the t-5 in the 3rd gen. You must buy a Buick even fire v-6 flywheel but it is drilled for the same bolt pattern as v-8 clutches. Also check the back of the crank. Some 3.8's were not machined for a pilot bearing.

Nate, doesn't the 3800 you put into your car have the metric bolt pattern? I had a 3800 out of a Firebird and I swear it had the metric bolt pattern. Sorry, if I'm wrong. I just want to clarify because of a 'future' project.

the 3.8 is a rwd out of a late model Camaro

the 5 speed is out of a 95 camaro 3.4

WHen I hear 3.8 I think of teh 80's GN/TT/A engine, not the 3800 Series II. Just my mind set.


The 2.8~3.4 rwd blocks have teh same tranny bolt pattern as the Series II sos the tranny combo is 2.8~ 3800 II.


There shouldn't be any issues w/that combo.

thank you very much, yeah i should of mentioned it earlier.