E34 Differential

[nimy]

I have question about interchangeable e34 diff 520 24v to 525 diff. It is plug and play? My existing diff is making sound right now and thinking to change to 525 diff coz i already change to 5 speed from 4 speed auto trans. How much the 525 diff right now? also which ratio to choose?

 

[fabianyee]

from what I know there are 2 different diff casing. So check to see which casing (and ratio) your E34 is using before looking for a replacement diff.

 

[nimy]

how i can know which type my differential? any tips for that?