diff options

[mrgtsx]

hey guys im in the process of replacing my 320 diff with something stroger to handle the power. i want one that fits in right so i was leaning towards a 325is diff. is there a stroner diff that will fit in? a 5 series?

[E30Mark]

How much power?

5 seriers diff won't fit (internals might)

Double check the diff mounting point to the chassis, not uncommon for these to rip off the chassis! - also make sure your sub frame mounts are new.

Can't see you'll gain much in strength between a 320 / 325 diff just different ratio's, unless the 320 is a small case??

[mrgtsx]

wel an s50 is going in so i would need something that can hold together car is pretty much a band spanker. underneath is like new and if changed all bushed and all mounting points are tip top

[daimlerman]

Two sizes of diff cases are used on E30's.The small one(6 bolts to the rear cover)went in the 4 pot cars and most 230's.The medium case diff(8 bolts to the rear cover)was used in all 325's.Both came in a multitude of ratios and open/LSD.The medium case unit was also fitted in E28's,which opens up the ratio range still futher.An ex E28 diff will need it's output flanges swopping to fit the narrower E30,however.Use a Z3M diff mounting bush.