E30 Driveshaft

[Kwanzi30Boy]

Got A M20 With A 5speed From A 525i
and A Driveshaft From A Manual E30
I Got The Engine Got The Engine In And Now I’ve Run
Into A Problem The Flange From The Transmission Doesn’t
Match The Drive Shaft. What I Do?

[Panici]

Do you have any pictures of the flange and driveshafts?

I know there were both small and big Giubo driveshafts made depending on model/year.

[bangn]

I assume you know there is a rubber donut "Giubo" between the tailshaft and transmission? There are a couple types of gearbox output flanges depending on year which suit the corresponding giubo.. from memory the E34 5 series had a larger flange. What's the bolt spacing measurement on your gearbox flange?

Basically you will need to either source the gearbox flange to suit your shaft (best option) OR get the tailshaft from the 5 series and have the flange transferred onto the e30 tailshaft you have. (which will be a fair bit of money as the shaft will then need to be balanced)

You will need a deep thinwall socket to get the nut off off that flange, idealy with a rattle gun as they can be a jerk to remove. Not bad if you have power/airtools tho.

[McGyver]

Looks like OP got their answer!

When I m30 swapped my car, I had to transfer smaller transmission output shaft flange onto the g265 so that I could use my stock e30 driveshaft. You're going to need an air or heavy duty electric impact to break the nut free.

[Kwanzi30Boy]

I’m Waiting On My Mechanic To Get Back To Me With Pics And Measurements

[Kwanzi30Boy]

Looks like OP got their answer!

When I m30 swapped my car, I had to transfer smaller transmission output shaft flange onto the g265 so that I could use my stock e30 driveshaft. You're going to need an air or heavy duty electric impact to break the nut free.

Do You Remember The Size Flange You Got For It?

[McGyver]

Do You Remember The Size Flange You Got For It?

Sorry, no clue