M3/1M Differential bushings into non-M?

[E30ROB]

Im in need of differential mounts and I read somewhere that the M3 bushings can be used in the front two positions of the differential but not the rear position.

Is that correct?

I plan to run M3 front bushings and OEM 135i rear bushing and have them all poly filled with 80A polyurethane.

THANKS IN ADVANCE!

[bbnks2]

Originally Posted by E30ROB

Im in need of differential mounts and I read somewhere that the M3 bushings can be used in the front two positions of the differential but not the rear position.

Is that correct?

I plan to run M3 front bushings and OEM 135i rear bushing and have them all poly filled with 80A polyurethane.

THANKS IN ADVANCE!

That is correct. The rear bushings is different. You cannot "poly fill" the rear bushings either. It is foam. You are best off just getting a set of aftermarket poly bushings. The rear bushings is foam and will still have tons of deflection if you try to pair it with poly filled M3 front bushings.

[E30ROB]

Originally Posted by bbnks2

That is correct. The rear bushings is different. You cannot "poly fill" the rear bushings either. It is foam. You are best off just getting a set of aftermarket poly bushings. The rear bushings is foam and will still have tons of deflection if you try to pair it with poly filled M3 front bushings.

Good to know, I went ahead and ordered M3 front location bushings and 135is rear location bushing. Will have those all sent off to be filled with poly when they arrive! Thanks for the verification!!!!