Trans question for S52 swap

[bwh13]

OK I was told by a source that the trans from the 318is and 325is (92-95) are basically the same and that either one will work behind the S52. These are the 250 Getrag units. I don't plan on having more than 280-290hp max from this engine and want to make sure I don't have to step up to the 320 ZF box from the M3 or 328is.

Also can I use the M3/328is 240mm diameter flywheel/clutch in the 250 trans?

[FredK]

Yes, you can use the M3 clutch with the Getrag 250. It's a common upgrade for E36 non-M vehicles.

However, I think spending the extra $150 or so on a ZF is a wiser choice--it can take more power.

[DeM3n]

It can take more power... but it all depends on what you want to do with it. For FI... ZF.... for everything else I think the Getrag will take what ever you throw at it. Plus, its cheaper!

[matt]

The bellhousing on the 318 250 is smaller... my flywheel didn't fit in it. It fit in the 325 trans just fine.

As far as I know, they are the same otherwise.

[bwh13]

OK so which flywheel/clutch can I use with the 250? Do I have to use the 318 or will the M3 fit?

[matt]

The stock M3 clutch/ flywheel should fit, but some aftermarket ones don't.

[bwh13]

Do you know for sure if the stock M3 flywheel/clutch will fit? Anyway to know before I spend the $ on them?